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var apply = require('./_apply'); | |
/* Built-in method references for those with the same name as other `lodash` methods. */ | |
var nativeMax = Math.max; | |
/** | |
* A specialized version of `baseRest` which transforms the rest array. | |
* | |
* @private | |
* @param {Function} func The function to apply a rest parameter to. | |
* @param {number} [start=func.length-1] The start position of the rest parameter. | |
* @param {Function} transform The rest array transform. | |
* @returns {Function} Returns the new function. | |
*/ | |
function overRest(func, start, transform) { | |
start = nativeMax(start === undefined ? (func.length - 1) : start, 0); | |
return function() { | |
var args = arguments, | |
index = -1, | |
length = nativeMax(args.length - start, 0), | |
array = Array(length); | |
while (++index < length) { | |
array[index] = args[start + index]; | |
} | |
index = -1; | |
var otherArgs = Array(start + 1); | |
while (++index < start) { | |
otherArgs[index] = args[index]; | |
} | |
otherArgs[start] = transform(array); | |
return apply(func, this, otherArgs); | |
}; | |
} | |
module.exports = overRest; | |