900 lines
		
	
	
		
			21 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			900 lines
		
	
	
		
			21 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
/**
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 * @license Fraction.js v4.2.1 20/08/2023
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 * https://www.xarg.org/2014/03/rational-numbers-in-javascript/
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 *
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 * Copyright (c) 2023, Robert Eisele (robert@raw.org)
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 * Dual licensed under the MIT or GPL Version 2 licenses.
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 **/
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/**
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 *
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 * This class offers the possibility to calculate fractions.
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 * You can pass a fraction in different formats. Either as array, as double, as string or as an integer.
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 *
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 * Array/Object form
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 * [ 0 => <numerator>, 1 => <denominator> ]
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 * [ n => <numerator>, d => <denominator> ]
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 *
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 * Integer form
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 * - Single integer value
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 *
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 * Double form
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 * - Single double value
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 *
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 * String form
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 * 123.456 - a simple double
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 * 123/456 - a string fraction
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 * 123.'456' - a double with repeating decimal places
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 * 123.(456) - synonym
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 * 123.45'6' - a double with repeating last place
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 * 123.45(6) - synonym
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 *
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 * Example:
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 *
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 * let f = new Fraction("9.4'31'");
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 * f.mul([-4, 3]).div(4.9);
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 *
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 */
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(function(root) {
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  "use strict";
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  // Set Identity function to downgrade BigInt to Number if needed
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  if (typeof BigInt === 'undefined') BigInt = function(n) { if (isNaN(n)) throw new Error(""); return n; };
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  const C_ONE = BigInt(1);
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  const C_ZERO = BigInt(0);
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  const C_TEN = BigInt(10);
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  const C_TWO = BigInt(2);
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  const C_FIVE = BigInt(5);
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  // Maximum search depth for cyclic rational numbers. 2000 should be more than enough.
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  // Example: 1/7 = 0.(142857) has 6 repeating decimal places.
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  // If MAX_CYCLE_LEN gets reduced, long cycles will not be detected and toString() only gets the first 10 digits
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  const MAX_CYCLE_LEN = 2000;
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  // Parsed data to avoid calling "new" all the time
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  const P = {
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    "s": C_ONE,
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    "n": C_ZERO,
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    "d": C_ONE
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  };
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  function assign(n, s) {
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    try {
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      n = BigInt(n);
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    } catch (e) {
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      throw InvalidParameter();
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    }
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    return n * s;
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  }
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  // Creates a new Fraction internally without the need of the bulky constructor
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  function newFraction(n, d) {
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    if (d === C_ZERO) {
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      throw DivisionByZero();
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    }
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    const f = Object.create(Fraction.prototype);
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    f["s"] = n < C_ZERO ? -C_ONE : C_ONE;
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    n = n < C_ZERO ? -n : n;
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    const a = gcd(n, d);
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    f["n"] = n / a;
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    f["d"] = d / a;
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    return f;
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  }
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  function factorize(num) {
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    const factors = {};
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    let n = num;
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    let i = C_TWO;
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    let s = C_FIVE - C_ONE;
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    while (s <= n) {
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      while (n % i === C_ZERO) {
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        n/= i;
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        factors[i] = (factors[i] || C_ZERO) + C_ONE;
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      }
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      s+= C_ONE + C_TWO * i++;
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    }
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    if (n !== num) {
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      if (n > 1)
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        factors[n] = (factors[n] || C_ZERO) + C_ONE;
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    } else {
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      factors[num] = (factors[num] || C_ZERO) + C_ONE;
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    }
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    return factors;
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  }
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  const parse = function(p1, p2) {
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    let n = C_ZERO, d = C_ONE, s = C_ONE;
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    if (p1 === undefined || p1 === null) {
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      /* void */
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    } else if (p2 !== undefined) {
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      n = BigInt(p1);
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      d = BigInt(p2);
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      s = n * d;
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      if (n % C_ONE !== C_ZERO || d % C_ONE !== C_ZERO) {
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        throw NonIntegerParameter();
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      }
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    } else if (typeof p1 === "object") {
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      if ("d" in p1 && "n" in p1) {
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        n = BigInt(p1["n"]);
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        d = BigInt(p1["d"]);
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        if ("s" in p1)
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          n*= BigInt(p1["s"]);
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      } else if (0 in p1) {
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        n = BigInt(p1[0]);
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        if (1 in p1)
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          d = BigInt(p1[1]);
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      } else if (p1 instanceof BigInt) {
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        n = BigInt(p1);
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      } else {
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        throw InvalidParameter();
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      }
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      s = n * d;
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    } else if (typeof p1 === "bigint") {
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      n = p1;
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      s = p1;
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      d = C_ONE;
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    } else if (typeof p1 === "number") {
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      if (isNaN(p1)) {
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        throw InvalidParameter();
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      }
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      if (p1 < 0) {
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        s = -C_ONE;
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        p1 = -p1;
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      }
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      if (p1 % 1 === 0) {
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        n = BigInt(p1);
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      } else if (p1 > 0) { // check for != 0, scale would become NaN (log(0)), which converges really slow
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        let z = 1;
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        let A = 0, B = 1;
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        let C = 1, D = 1;
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        let N = 10000000;
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        if (p1 >= 1) {
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          z = 10 ** Math.floor(1 + Math.log10(p1));
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          p1/= z;
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        }
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        // Using Farey Sequences
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        while (B <= N && D <= N) {
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          let M = (A + C) / (B + D);
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          if (p1 === M) {
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            if (B + D <= N) {
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              n = A + C;
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              d = B + D;
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            } else if (D > B) {
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              n = C;
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              d = D;
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            } else {
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              n = A;
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              d = B;
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            }
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            break;
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          } else {
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            if (p1 > M) {
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              A+= C;
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              B+= D;
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            } else {
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              C+= A;
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              D+= B;
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            }
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            if (B > N) {
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              n = C;
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              d = D;
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            } else {
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              n = A;
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              d = B;
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            }
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          }
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        }
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        n = BigInt(n) * BigInt(z);
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        d = BigInt(d);
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      }
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    } else if (typeof p1 === "string") {
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      let ndx = 0;
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      let v = C_ZERO, w = C_ZERO, x = C_ZERO, y = C_ONE, z = C_ONE;
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      let match = p1.match(/\d+|./g);
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      if (match === null)
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        throw InvalidParameter();
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      if (match[ndx] === '-') {// Check for minus sign at the beginning
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        s = -C_ONE;
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        ndx++;
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      } else if (match[ndx] === '+') {// Check for plus sign at the beginning
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        ndx++;
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      }
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      if (match.length === ndx + 1) { // Check if it's just a simple number "1234"
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        w = assign(match[ndx++], s);
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      } else if (match[ndx + 1] === '.' || match[ndx] === '.') { // Check if it's a decimal number
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        if (match[ndx] !== '.') { // Handle 0.5 and .5
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          v = assign(match[ndx++], s);
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        }
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        ndx++;
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        // Check for decimal places
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        if (ndx + 1 === match.length || match[ndx + 1] === '(' && match[ndx + 3] === ')' || match[ndx + 1] === "'" && match[ndx + 3] === "'") {
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          w = assign(match[ndx], s);
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          y = C_TEN ** BigInt(match[ndx].length);
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          ndx++;
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        }
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        // Check for repeating places
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        if (match[ndx] === '(' && match[ndx + 2] === ')' || match[ndx] === "'" && match[ndx + 2] === "'") {
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          x = assign(match[ndx + 1], s);
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          z = C_TEN ** BigInt(match[ndx + 1].length) - C_ONE;
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          ndx+= 3;
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        }
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      } else if (match[ndx + 1] === '/' || match[ndx + 1] === ':') { // Check for a simple fraction "123/456" or "123:456"
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        w = assign(match[ndx], s);
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        y = assign(match[ndx + 2], C_ONE);
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        ndx+= 3;
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      } else if (match[ndx + 3] === '/' && match[ndx + 1] === ' ') { // Check for a complex fraction "123 1/2"
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        v = assign(match[ndx], s);
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        w = assign(match[ndx + 2], s);
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        y = assign(match[ndx + 4], C_ONE);
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        ndx+= 5;
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      }
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      if (match.length <= ndx) { // Check for more tokens on the stack
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        d = y * z;
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        s = /* void */
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        n = x + d * v + z * w;
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      } else {
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        throw InvalidParameter();
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      }
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    } else {
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      throw InvalidParameter();
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    }
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    if (d === C_ZERO) {
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      throw DivisionByZero();
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    }
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    P["s"] = s < C_ZERO ? -C_ONE : C_ONE;
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    P["n"] = n < C_ZERO ? -n : n;
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    P["d"] = d < C_ZERO ? -d : d;
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  };
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  function modpow(b, e, m) {
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    let r = C_ONE;
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    for (; e > C_ZERO; b = (b * b) % m, e >>= C_ONE) {
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      if (e & C_ONE) {
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        r = (r * b) % m;
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      }
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    }
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    return r;
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  }
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  function cycleLen(n, d) {
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    for (; d % C_TWO === C_ZERO;
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      d/= C_TWO) {
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    }
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    for (; d % C_FIVE === C_ZERO;
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      d/= C_FIVE) {
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    }
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    if (d === C_ONE) // Catch non-cyclic numbers
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      return C_ZERO;
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    // If we would like to compute really large numbers quicker, we could make use of Fermat's little theorem:
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    // 10^(d-1) % d == 1
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    // However, we don't need such large numbers and MAX_CYCLE_LEN should be the capstone,
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    // as we want to translate the numbers to strings.
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    let rem = C_TEN % d;
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    let t = 1;
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    for (; rem !== C_ONE; t++) {
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      rem = rem * C_TEN % d;
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      if (t > MAX_CYCLE_LEN)
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        return C_ZERO; // Returning 0 here means that we don't print it as a cyclic number. It's likely that the answer is `d-1`
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    }
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    return BigInt(t);
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  }
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  function cycleStart(n, d, len) {
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    let rem1 = C_ONE;
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    let rem2 = modpow(C_TEN, len, d);
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    for (let t = 0; t < 300; t++) { // s < ~log10(Number.MAX_VALUE)
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      // Solve 10^s == 10^(s+t) (mod d)
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      if (rem1 === rem2)
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        return BigInt(t);
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      rem1 = rem1 * C_TEN % d;
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      rem2 = rem2 * C_TEN % d;
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    }
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    return 0;
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  }
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  function gcd(a, b) {
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    if (!a)
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      return b;
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    if (!b)
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      return a;
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    while (1) {
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      a%= b;
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      if (!a)
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        return b;
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      b%= a;
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      if (!b)
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        return a;
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    }
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  }
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  /**
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   * Module constructor
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   *
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   * @constructor
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   * @param {number|Fraction=} a
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   * @param {number=} b
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   */
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  function Fraction(a, b) {
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    parse(a, b);
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    if (this instanceof Fraction) {
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      a = gcd(P["d"], P["n"]); // Abuse a
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      this["s"] = P["s"];
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      this["n"] = P["n"] / a;
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      this["d"] = P["d"] / a;
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    } else {
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      return newFraction(P['s'] * P['n'], P['d']);
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    }
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  }
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  var DivisionByZero = function() {return new Error("Division by Zero");};
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  var InvalidParameter = function() {return new Error("Invalid argument");};
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  var NonIntegerParameter = function() {return new Error("Parameters must be integer");};
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  Fraction.prototype = {
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    "s": C_ONE,
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    "n": C_ZERO,
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    "d": C_ONE,
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    /**
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     * Calculates the absolute value
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     *
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     * Ex: new Fraction(-4).abs() => 4
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     **/
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    "abs": function() {
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      return newFraction(this["n"], this["d"]);
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    },
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    /**
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     * Inverts the sign of the current fraction
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     *
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     * Ex: new Fraction(-4).neg() => 4
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     **/
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    "neg": function() {
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      return newFraction(-this["s"] * this["n"], this["d"]);
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    },
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    /**
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     * Adds two rational numbers
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     *
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     * Ex: new Fraction({n: 2, d: 3}).add("14.9") => 467 / 30
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     **/
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    "add": function(a, b) {
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      parse(a, b);
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      return newFraction(
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        this["s"] * this["n"] * P["d"] + P["s"] * this["d"] * P["n"],
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        this["d"] * P["d"]
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      );
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    },
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    /**
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     * Subtracts two rational numbers
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     *
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     * Ex: new Fraction({n: 2, d: 3}).add("14.9") => -427 / 30
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     **/
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    "sub": function(a, b) {
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      parse(a, b);
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      return newFraction(
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        this["s"] * this["n"] * P["d"] - P["s"] * this["d"] * P["n"],
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        this["d"] * P["d"]
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      );
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    },
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    /**
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     * Multiplies two rational numbers
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     *
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     * Ex: new Fraction("-17.(345)").mul(3) => 5776 / 111
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     **/
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    "mul": function(a, b) {
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      parse(a, b);
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      return newFraction(
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        this["s"] * P["s"] * this["n"] * P["n"],
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        this["d"] * P["d"]
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      );
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    },
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    /**
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     * Divides two rational numbers
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     *
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     * Ex: new Fraction("-17.(345)").inverse().div(3)
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     **/
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    "div": function(a, b) {
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      parse(a, b);
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      return newFraction(
 | 
						|
        this["s"] * P["s"] * this["n"] * P["d"],
 | 
						|
        this["d"] * P["n"]
 | 
						|
      );
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Clones the actual object
 | 
						|
     *
 | 
						|
     * Ex: new Fraction("-17.(345)").clone()
 | 
						|
     **/
 | 
						|
    "clone": function() {
 | 
						|
      return newFraction(this['s'] * this['n'], this['d']);
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Calculates the modulo of two rational numbers - a more precise fmod
 | 
						|
     *
 | 
						|
     * Ex: new Fraction('4.(3)').mod([7, 8]) => (13/3) % (7/8) = (5/6)
 | 
						|
     **/
 | 
						|
    "mod": function(a, b) {
 | 
						|
 | 
						|
      if (a === undefined) {
 | 
						|
        return newFraction(this["s"] * this["n"] % this["d"], C_ONE);
 | 
						|
      }
 | 
						|
 | 
						|
      parse(a, b);
 | 
						|
      if (0 === P["n"] && 0 === this["d"]) {
 | 
						|
        throw DivisionByZero();
 | 
						|
      }
 | 
						|
 | 
						|
      /*
 | 
						|
       * First silly attempt, kinda slow
 | 
						|
       *
 | 
						|
       return that["sub"]({
 | 
						|
       "n": num["n"] * Math.floor((this.n / this.d) / (num.n / num.d)),
 | 
						|
       "d": num["d"],
 | 
						|
       "s": this["s"]
 | 
						|
       });*/
 | 
						|
 | 
						|
      /*
 | 
						|
       * New attempt: a1 / b1 = a2 / b2 * q + r
 | 
						|
       * => b2 * a1 = a2 * b1 * q + b1 * b2 * r
 | 
						|
       * => (b2 * a1 % a2 * b1) / (b1 * b2)
 | 
						|
       */
 | 
						|
      return newFraction(
 | 
						|
        this["s"] * (P["d"] * this["n"]) % (P["n"] * this["d"]),
 | 
						|
        P["d"] * this["d"]
 | 
						|
      );
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Calculates the fractional gcd of two rational numbers
 | 
						|
     *
 | 
						|
     * Ex: new Fraction(5,8).gcd(3,7) => 1/56
 | 
						|
     */
 | 
						|
    "gcd": function(a, b) {
 | 
						|
 | 
						|
      parse(a, b);
 | 
						|
 | 
						|
      // gcd(a / b, c / d) = gcd(a, c) / lcm(b, d)
 | 
						|
 | 
						|
      return newFraction(gcd(P["n"], this["n"]) * gcd(P["d"], this["d"]), P["d"] * this["d"]);
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Calculates the fractional lcm of two rational numbers
 | 
						|
     *
 | 
						|
     * Ex: new Fraction(5,8).lcm(3,7) => 15
 | 
						|
     */
 | 
						|
    "lcm": function(a, b) {
 | 
						|
 | 
						|
      parse(a, b);
 | 
						|
 | 
						|
      // lcm(a / b, c / d) = lcm(a, c) / gcd(b, d)
 | 
						|
 | 
						|
      if (P["n"] === C_ZERO && this["n"] === C_ZERO) {
 | 
						|
        return newFraction(C_ZERO, C_ONE);
 | 
						|
      }
 | 
						|
      return newFraction(P["n"] * this["n"], gcd(P["n"], this["n"]) * gcd(P["d"], this["d"]));
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Gets the inverse of the fraction, means numerator and denominator are exchanged
 | 
						|
     *
 | 
						|
     * Ex: new Fraction([-3, 4]).inverse() => -4 / 3
 | 
						|
     **/
 | 
						|
    "inverse": function() {
 | 
						|
      return newFraction(this["s"] * this["d"], this["n"]);
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Calculates the fraction to some integer exponent
 | 
						|
     *
 | 
						|
     * Ex: new Fraction(-1,2).pow(-3) => -8
 | 
						|
     */
 | 
						|
    "pow": function(a, b) {
 | 
						|
 | 
						|
      parse(a, b);
 | 
						|
 | 
						|
      // Trivial case when exp is an integer
 | 
						|
 | 
						|
      if (P['d'] === C_ONE) {
 | 
						|
 | 
						|
        if (P['s'] < C_ZERO) {
 | 
						|
          return newFraction((this['s'] * this["d"]) ** P['n'], this["n"] ** P['n']);
 | 
						|
        } else {
 | 
						|
          return newFraction((this['s'] * this["n"]) ** P['n'], this["d"] ** P['n']);
 | 
						|
        }
 | 
						|
      }
 | 
						|
 | 
						|
      // Negative roots become complex
 | 
						|
      //     (-a/b)^(c/d) = x
 | 
						|
      // <=> (-1)^(c/d) * (a/b)^(c/d) = x
 | 
						|
      // <=> (cos(pi) + i*sin(pi))^(c/d) * (a/b)^(c/d) = x
 | 
						|
      // <=> (cos(c*pi/d) + i*sin(c*pi/d)) * (a/b)^(c/d) = x       # DeMoivre's formula
 | 
						|
      // From which follows that only for c=0 the root is non-complex
 | 
						|
      if (this['s'] < C_ZERO) return null;
 | 
						|
 | 
						|
      // Now prime factor n and d
 | 
						|
      let N = factorize(this['n']);
 | 
						|
      let D = factorize(this['d']);
 | 
						|
 | 
						|
      // Exponentiate and take root for n and d individually
 | 
						|
      let n = C_ONE;
 | 
						|
      let d = C_ONE;
 | 
						|
      for (let k in N) {
 | 
						|
        if (k === '1') continue;
 | 
						|
        if (k === '0') {
 | 
						|
          n = C_ZERO;
 | 
						|
          break;
 | 
						|
        }
 | 
						|
        N[k]*= P['n'];
 | 
						|
 | 
						|
        if (N[k] % P['d'] === C_ZERO) {
 | 
						|
          N[k]/= P['d'];
 | 
						|
        } else return null;
 | 
						|
        n*= BigInt(k) ** N[k];
 | 
						|
      }
 | 
						|
 | 
						|
      for (let k in D) {
 | 
						|
        if (k === '1') continue;
 | 
						|
        D[k]*= P['n'];
 | 
						|
 | 
						|
        if (D[k] % P['d'] === C_ZERO) {
 | 
						|
          D[k]/= P['d'];
 | 
						|
        } else return null;
 | 
						|
        d*= BigInt(k) ** D[k];
 | 
						|
      }
 | 
						|
 | 
						|
      if (P['s'] < C_ZERO) {
 | 
						|
        return newFraction(d, n);
 | 
						|
      }
 | 
						|
      return newFraction(n, d);
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Check if two rational numbers are the same
 | 
						|
     *
 | 
						|
     * Ex: new Fraction(19.6).equals([98, 5]);
 | 
						|
     **/
 | 
						|
    "equals": function(a, b) {
 | 
						|
 | 
						|
      parse(a, b);
 | 
						|
      return this["s"] * this["n"] * P["d"] === P["s"] * P["n"] * this["d"]; // Same as compare() === 0
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Check if two rational numbers are the same
 | 
						|
     *
 | 
						|
     * Ex: new Fraction(19.6).equals([98, 5]);
 | 
						|
     **/
 | 
						|
    "compare": function(a, b) {
 | 
						|
 | 
						|
      parse(a, b);
 | 
						|
      let t = (this["s"] * this["n"] * P["d"] - P["s"] * P["n"] * this["d"]);
 | 
						|
 | 
						|
      return (C_ZERO < t) - (t < C_ZERO);
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Calculates the ceil of a rational number
 | 
						|
     *
 | 
						|
     * Ex: new Fraction('4.(3)').ceil() => (5 / 1)
 | 
						|
     **/
 | 
						|
    "ceil": function(places) {
 | 
						|
 | 
						|
      places = C_TEN ** BigInt(places || 0);
 | 
						|
 | 
						|
      return newFraction(this["s"] * places * this["n"] / this["d"] +
 | 
						|
        (places * this["n"] % this["d"] > C_ZERO && this["s"] >= C_ZERO ? C_ONE : C_ZERO),
 | 
						|
        places);
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Calculates the floor of a rational number
 | 
						|
     *
 | 
						|
     * Ex: new Fraction('4.(3)').floor() => (4 / 1)
 | 
						|
     **/
 | 
						|
    "floor": function(places) {
 | 
						|
 | 
						|
      places = C_TEN ** BigInt(places || 0);
 | 
						|
 | 
						|
      return newFraction(this["s"] * places * this["n"] / this["d"] -
 | 
						|
        (places * this["n"] % this["d"] > C_ZERO && this["s"] < C_ZERO ? C_ONE : C_ZERO),
 | 
						|
        places);
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Rounds a rational numbers
 | 
						|
     *
 | 
						|
     * Ex: new Fraction('4.(3)').round() => (4 / 1)
 | 
						|
     **/
 | 
						|
    "round": function(places) {
 | 
						|
 | 
						|
      places = C_TEN ** BigInt(places || 0);
 | 
						|
 | 
						|
      /* Derivation:
 | 
						|
 | 
						|
      s >= 0:
 | 
						|
        round(n / d) = trunc(n / d) + (n % d) / d >= 0.5 ? 1 : 0
 | 
						|
                     = trunc(n / d) + 2(n % d) >= d ? 1 : 0
 | 
						|
      s < 0:
 | 
						|
        round(n / d) =-trunc(n / d) - (n % d) / d > 0.5 ? 1 : 0
 | 
						|
                     =-trunc(n / d) - 2(n % d) > d ? 1 : 0
 | 
						|
 | 
						|
      =>:
 | 
						|
 | 
						|
      round(s * n / d) = s * trunc(n / d) + s * (C + 2(n % d) > d ? 1 : 0)
 | 
						|
          where C = s >= 0 ? 1 : 0, to fix the >= for the positve case.
 | 
						|
      */
 | 
						|
 | 
						|
      return newFraction(this["s"] * places * this["n"] / this["d"] +
 | 
						|
        this["s"] * ((this["s"] >= C_ZERO ? C_ONE : C_ZERO) + C_TWO * (places * this["n"] % this["d"]) > this["d"] ? C_ONE : C_ZERO),
 | 
						|
        places);
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Check if two rational numbers are divisible
 | 
						|
     *
 | 
						|
     * Ex: new Fraction(19.6).divisible(1.5);
 | 
						|
     */
 | 
						|
    "divisible": function(a, b) {
 | 
						|
 | 
						|
      parse(a, b);
 | 
						|
      return !(!(P["n"] * this["d"]) || ((this["n"] * P["d"]) % (P["n"] * this["d"])));
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Returns a decimal representation of the fraction
 | 
						|
     *
 | 
						|
     * Ex: new Fraction("100.'91823'").valueOf() => 100.91823918239183
 | 
						|
     **/
 | 
						|
    'valueOf': function() {
 | 
						|
      // Best we can do so far
 | 
						|
      return Number(this["s"] * this["n"]) / Number(this["d"]);
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Creates a string representation of a fraction with all digits
 | 
						|
     *
 | 
						|
     * Ex: new Fraction("100.'91823'").toString() => "100.(91823)"
 | 
						|
     **/
 | 
						|
    'toString': function(dec) {
 | 
						|
 | 
						|
      let N = this["n"];
 | 
						|
      let D = this["d"];
 | 
						|
 | 
						|
      function trunc(x) {
 | 
						|
          return typeof x === 'bigint' ? x : Math.floor(x);
 | 
						|
      }
 | 
						|
 | 
						|
      dec = dec || 15; // 15 = decimal places when no repetition
 | 
						|
 | 
						|
      let cycLen = cycleLen(N, D); // Cycle length
 | 
						|
      let cycOff = cycleStart(N, D, cycLen); // Cycle start
 | 
						|
 | 
						|
      let str = this['s'] < C_ZERO ? "-" : "";
 | 
						|
 | 
						|
      // Append integer part
 | 
						|
      str+= trunc(N / D);
 | 
						|
 | 
						|
      N%= D;
 | 
						|
      N*= C_TEN;
 | 
						|
 | 
						|
      if (N)
 | 
						|
        str+= ".";
 | 
						|
 | 
						|
      if (cycLen) {
 | 
						|
 | 
						|
        for (let i = cycOff; i--;) {
 | 
						|
          str+= trunc(N / D);
 | 
						|
          N%= D;
 | 
						|
          N*= C_TEN;
 | 
						|
        }
 | 
						|
        str+= "(";
 | 
						|
        for (let i = cycLen; i--;) {
 | 
						|
          str+= trunc(N / D);
 | 
						|
          N%= D;
 | 
						|
          N*= C_TEN;
 | 
						|
        }
 | 
						|
        str+= ")";
 | 
						|
      } else {
 | 
						|
        for (let i = dec; N && i--;) {
 | 
						|
          str+= trunc(N / D);
 | 
						|
          N%= D;
 | 
						|
          N*= C_TEN;
 | 
						|
        }
 | 
						|
      }
 | 
						|
      return str;
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Returns a string-fraction representation of a Fraction object
 | 
						|
     *
 | 
						|
     * Ex: new Fraction("1.'3'").toFraction() => "4 1/3"
 | 
						|
     **/
 | 
						|
    'toFraction': function(excludeWhole) {
 | 
						|
 | 
						|
      let n = this["n"];
 | 
						|
      let d = this["d"];
 | 
						|
      let str = this['s'] < C_ZERO ? "-" : "";
 | 
						|
 | 
						|
      if (d === C_ONE) {
 | 
						|
        str+= n;
 | 
						|
      } else {
 | 
						|
        let whole = n / d;
 | 
						|
        if (excludeWhole && whole > C_ZERO) {
 | 
						|
          str+= whole;
 | 
						|
          str+= " ";
 | 
						|
          n%= d;
 | 
						|
        }
 | 
						|
 | 
						|
        str+= n;
 | 
						|
        str+= '/';
 | 
						|
        str+= d;
 | 
						|
      }
 | 
						|
      return str;
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Returns a latex representation of a Fraction object
 | 
						|
     *
 | 
						|
     * Ex: new Fraction("1.'3'").toLatex() => "\frac{4}{3}"
 | 
						|
     **/
 | 
						|
    'toLatex': function(excludeWhole) {
 | 
						|
 | 
						|
      let n = this["n"];
 | 
						|
      let d = this["d"];
 | 
						|
      let str = this['s'] < C_ZERO ? "-" : "";
 | 
						|
 | 
						|
      if (d === C_ONE) {
 | 
						|
        str+= n;
 | 
						|
      } else {
 | 
						|
        let whole = n / d;
 | 
						|
        if (excludeWhole && whole > C_ZERO) {
 | 
						|
          str+= whole;
 | 
						|
          n%= d;
 | 
						|
        }
 | 
						|
 | 
						|
        str+= "\\frac{";
 | 
						|
        str+= n;
 | 
						|
        str+= '}{';
 | 
						|
        str+= d;
 | 
						|
        str+= '}';
 | 
						|
      }
 | 
						|
      return str;
 | 
						|
    },
 | 
						|
 | 
						|
    /**
 | 
						|
     * Returns an array of continued fraction elements
 | 
						|
     *
 | 
						|
     * Ex: new Fraction("7/8").toContinued() => [0,1,7]
 | 
						|
     */
 | 
						|
    'toContinued': function() {
 | 
						|
 | 
						|
      let a = this['n'];
 | 
						|
      let b = this['d'];
 | 
						|
      let res = [];
 | 
						|
 | 
						|
      do {
 | 
						|
        res.push(a / b);
 | 
						|
        let t = a % b;
 | 
						|
        a = b;
 | 
						|
        b = t;
 | 
						|
      } while (a !== C_ONE);
 | 
						|
 | 
						|
      return res;
 | 
						|
    },
 | 
						|
 | 
						|
    "simplify": function(eps) {
 | 
						|
 | 
						|
      eps = eps || 0.001;
 | 
						|
 | 
						|
      const thisABS = this['abs']();
 | 
						|
      const cont = thisABS['toContinued']();
 | 
						|
 | 
						|
      for (let i = 1; i < cont.length; i++) {
 | 
						|
 | 
						|
        let s = newFraction(cont[i - 1], C_ONE);
 | 
						|
        for (let k = i - 2; k >= 0; k--) {
 | 
						|
          s = s['inverse']()['add'](cont[k]);
 | 
						|
        }
 | 
						|
 | 
						|
        if (Math.abs(s['sub'](thisABS).valueOf()) < eps) {
 | 
						|
          return s['mul'](this['s']);
 | 
						|
        }
 | 
						|
      }
 | 
						|
      return this;
 | 
						|
    }
 | 
						|
  };
 | 
						|
 | 
						|
  if (typeof define === "function" && define["amd"]) {
 | 
						|
    define([], function() {
 | 
						|
      return Fraction;
 | 
						|
    });
 | 
						|
  } else if (typeof exports === "object") {
 | 
						|
    Object.defineProperty(exports, "__esModule", { 'value': true });
 | 
						|
    Fraction['default'] = Fraction;
 | 
						|
    Fraction['Fraction'] = Fraction;
 | 
						|
    module['exports'] = Fraction;
 | 
						|
  } else {
 | 
						|
    root['Fraction'] = Fraction;
 | 
						|
  }
 | 
						|
 | 
						|
})(this);
 |