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44 lines
1007 B
JavaScript
44 lines
1007 B
JavaScript
6 years ago
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var arrayPush = require('./_arrayPush'),
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baseFlatten = require('./_baseFlatten'),
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copyArray = require('./_copyArray'),
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isArray = require('./isArray');
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/**
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* Creates a new array concatenating `array` with any additional arrays
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* and/or values.
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*
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* @static
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* @memberOf _
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* @since 4.0.0
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* @category Array
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* @param {Array} array The array to concatenate.
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* @param {...*} [values] The values to concatenate.
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* @returns {Array} Returns the new concatenated array.
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* @example
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*
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* var array = [1];
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* var other = _.concat(array, 2, [3], [[4]]);
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*
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* console.log(other);
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* // => [1, 2, 3, [4]]
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*
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* console.log(array);
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* // => [1]
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*/
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function concat() {
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var length = arguments.length;
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if (!length) {
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return [];
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}
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var args = Array(length - 1),
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array = arguments[0],
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index = length;
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while (index--) {
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args[index - 1] = arguments[index];
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}
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return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
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}
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module.exports = concat;
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