| 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; |