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on this file since 188ee53 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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[6a3a178] | 1 | var arraySampleSize = require('./_arraySampleSize'),
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| 2 | baseSampleSize = require('./_baseSampleSize'),
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| 3 | isArray = require('./isArray'),
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| 4 | isIterateeCall = require('./_isIterateeCall'),
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| 5 | toInteger = require('./toInteger');
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| 6 |
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| 7 | /**
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| 8 | * Gets `n` random elements at unique keys from `collection` up to the
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| 9 | * size of `collection`.
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| 10 | *
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| 11 | * @static
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| 12 | * @memberOf _
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| 13 | * @since 4.0.0
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| 14 | * @category Collection
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| 15 | * @param {Array|Object} collection The collection to sample.
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| 16 | * @param {number} [n=1] The number of elements to sample.
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| 17 | * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
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| 18 | * @returns {Array} Returns the random elements.
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| 19 | * @example
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| 20 | *
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| 21 | * _.sampleSize([1, 2, 3], 2);
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| 22 | * // => [3, 1]
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| 23 | *
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| 24 | * _.sampleSize([1, 2, 3], 4);
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| 25 | * // => [2, 3, 1]
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| 26 | */
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| 27 | function sampleSize(collection, n, guard) {
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| 28 | if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
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| 29 | n = 1;
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| 30 | } else {
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| 31 | n = toInteger(n);
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| 32 | }
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| 33 | var func = isArray(collection) ? arraySampleSize : baseSampleSize;
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| 34 | return func(collection, n);
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| 35 | }
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| 36 |
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| 37 | module.exports = sampleSize;
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