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105 lines
2.9 KiB
JavaScript
105 lines
2.9 KiB
JavaScript
/**
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* lodash 4.3.0 (Custom Build) <https://lodash.com/>
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* Build: `lodash modularize exports="npm" -o ./`
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* Copyright jQuery Foundation and other contributors <https://jquery.org/>
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* Released under MIT license <https://lodash.com/license>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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*/
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var baseFlatten = require('lodash._baseflatten'),
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baseIteratee = require('lodash._baseiteratee'),
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rest = require('lodash.rest');
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/**
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* A faster alternative to `Function#apply`, this function invokes `func`
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* with the `this` binding of `thisArg` and the arguments of `args`.
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*
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* @private
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* @param {Function} func The function to invoke.
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* @param {*} thisArg The `this` binding of `func`.
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* @param {...*} args The arguments to invoke `func` with.
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* @returns {*} Returns the result of `func`.
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*/
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function apply(func, thisArg, args) {
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var length = args.length;
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switch (length) {
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case 0: return func.call(thisArg);
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case 1: return func.call(thisArg, args[0]);
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case 2: return func.call(thisArg, args[0], args[1]);
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case 3: return func.call(thisArg, args[0], args[1], args[2]);
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}
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return func.apply(thisArg, args);
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}
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/**
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* A specialized version of `_.map` for arrays without support for iteratee
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* shorthands.
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*
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* @private
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* @param {Array} array The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Array} Returns the new mapped array.
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*/
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function arrayMap(array, iteratee) {
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var index = -1,
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length = array.length,
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result = Array(length);
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while (++index < length) {
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result[index] = iteratee(array[index], index, array);
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}
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return result;
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}
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/* Built-in method references for those with the same name as other `lodash` methods. */
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var nativeMin = Math.min;
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/**
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* Creates a function that invokes `func` with arguments transformed by
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* corresponding `transforms`.
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*
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* @static
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* @since 4.0.0
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* @memberOf _
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* @category Function
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* @param {Function} func The function to wrap.
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* @param {...(Function|Function[])} [transforms] The functions to transform
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* arguments, specified individually or in arrays.
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* @returns {Function} Returns the new function.
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* @example
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*
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* function doubled(n) {
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* return n * 2;
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* }
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*
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* function square(n) {
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* return n * n;
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* }
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*
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* var func = _.overArgs(function(x, y) {
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* return [x, y];
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* }, square, doubled);
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*
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* func(9, 3);
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* // => [81, 6]
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*
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* func(10, 5);
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* // => [100, 10]
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*/
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var overArgs = rest(function(func, transforms) {
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transforms = arrayMap(baseFlatten(transforms, 1), baseIteratee);
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var funcsLength = transforms.length;
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return rest(function(args) {
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var index = -1,
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length = nativeMin(args.length, funcsLength);
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while (++index < length) {
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args[index] = transforms[index].call(this, args[index]);
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}
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return apply(func, this, args);
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});
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});
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module.exports = overArgs;
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