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on this file since 571e0df was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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1 | var apply = require('./_apply');
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2 |
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3 | /* Built-in method references for those with the same name as other `lodash` methods. */
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4 | var nativeMax = Math.max;
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5 |
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6 | /**
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7 | * A specialized version of `baseRest` which transforms the rest array.
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8 | *
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9 | * @private
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10 | * @param {Function} func The function to apply a rest parameter to.
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11 | * @param {number} [start=func.length-1] The start position of the rest parameter.
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12 | * @param {Function} transform The rest array transform.
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13 | * @returns {Function} Returns the new function.
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14 | */
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15 | function overRest(func, start, transform) {
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16 | start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
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17 | return function() {
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18 | var args = arguments,
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19 | index = -1,
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20 | length = nativeMax(args.length - start, 0),
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21 | array = Array(length);
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22 |
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23 | while (++index < length) {
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24 | array[index] = args[start + index];
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25 | }
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26 | index = -1;
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27 | var otherArgs = Array(start + 1);
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28 | while (++index < start) {
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29 | otherArgs[index] = args[index];
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30 | }
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31 | otherArgs[start] = transform(array);
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32 | return apply(func, this, otherArgs);
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33 | };
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34 | }
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35 |
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36 | module.exports = overRest;
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