var baseFlatten = require('../internal/baseFlatten'), createWrapper = require('../internal/createWrapper'), restParam = require('./restParam'); /** Used to compose bitmasks for wrapper metadata. */ var REARG_FLAG = 256; /** * Creates a function that invokes `func` with arguments arranged according * to the specified indexes where the argument value at the first index is * provided as the first argument, the argument value at the second index is * provided as the second argument, and so on. * * @static * @memberOf _ * @category Function * @param {Function} func The function to rearrange arguments for. * @param {...(number|number[])} indexes The arranged argument indexes, * specified as individual indexes or arrays of indexes. * @returns {Function} Returns the new function. * @example * * var rearged = _.rearg(function(a, b, c) { * return [a, b, c]; * }, 2, 0, 1); * * rearged('b', 'c', 'a') * // => ['a', 'b', 'c'] * * var map = _.rearg(_.map, [1, 0]); * map(function(n) { * return n * 3; * }, [1, 2, 3]); * // => [3, 6, 9] */ var rearg = restParam(function(func, indexes) { return createWrapper(func, REARG_FLAG, undefined, undefined, undefined, baseFlatten(indexes)); }); module.exports = rearg;