rearg.js (1023B)
1 var createWrap = require('./_createWrap'), 2 flatRest = require('./_flatRest'); 3 4 /** Used to compose bitmasks for function metadata. */ 5 var WRAP_REARG_FLAG = 256; 6 7 /** 8 * Creates a function that invokes `func` with arguments arranged according 9 * to the specified `indexes` where the argument value at the first index is 10 * provided as the first argument, the argument value at the second index is 11 * provided as the second argument, and so on. 12 * 13 * @static 14 * @memberOf _ 15 * @since 3.0.0 16 * @category Function 17 * @param {Function} func The function to rearrange arguments for. 18 * @param {...(number|number[])} indexes The arranged argument indexes. 19 * @returns {Function} Returns the new function. 20 * @example 21 * 22 * var rearged = _.rearg(function(a, b, c) { 23 * return [a, b, c]; 24 * }, [2, 0, 1]); 25 * 26 * rearged('b', 'c', 'a') 27 * // => ['a', 'b', 'c'] 28 */ 29 var rearg = flatRest(function(func, indexes) { 30 return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes); 31 }); 32 33 module.exports = rearg;