38 lines
1.0 KiB
JavaScript
38 lines
1.0 KiB
JavaScript
import arraySampleSize from './_arraySampleSize.js';
|
|
import baseSampleSize from './_baseSampleSize.js';
|
|
import isArray from './isArray.js';
|
|
import isIterateeCall from './_isIterateeCall.js';
|
|
import toInteger from './toInteger.js';
|
|
|
|
/**
|
|
* Gets `n` random elements at unique keys from `collection` up to the
|
|
* size of `collection`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Collection
|
|
* @param {Array|Object} collection The collection to sample.
|
|
* @param {number} [n=1] The number of elements to sample.
|
|
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
|
|
* @returns {Array} Returns the random elements.
|
|
* @example
|
|
*
|
|
* _.sampleSize([1, 2, 3], 2);
|
|
* // => [3, 1]
|
|
*
|
|
* _.sampleSize([1, 2, 3], 4);
|
|
* // => [2, 3, 1]
|
|
*/
|
|
function sampleSize(collection, n, guard) {
|
|
if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
|
|
n = 1;
|
|
} else {
|
|
n = toInteger(n);
|
|
}
|
|
var func = isArray(collection) ? arraySampleSize : baseSampleSize;
|
|
return func(collection, n);
|
|
}
|
|
|
|
export default sampleSize;
|