| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 1 | var baseRest = require('./_baseRest'), |
| 2 | createWrap = require('./_createWrap'), |
| 3 | getHolder = require('./_getHolder'), |
| 4 | replaceHolders = require('./_replaceHolders'); |
| 5 | |
| 6 | /** Used to compose bitmasks for function metadata. */ |
| 7 | var WRAP_PARTIAL_RIGHT_FLAG = 64; |
| 8 | |
| 9 | /** |
| 10 | * This method is like `_.partial` except that partially applied arguments |
| 11 | * are appended to the arguments it receives. |
| 12 | * |
| 13 | * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic |
| 14 | * builds, may be used as a placeholder for partially applied arguments. |
| 15 | * |
| 16 | * **Note:** This method doesn't set the "length" property of partially |
| 17 | * applied functions. |
| 18 | * |
| 19 | * @static |
| 20 | * @memberOf _ |
| 21 | * @since 1.0.0 |
| 22 | * @category Function |
| 23 | * @param {Function} func The function to partially apply arguments to. |
| 24 | * @param {...*} [partials] The arguments to be partially applied. |
| 25 | * @returns {Function} Returns the new partially applied function. |
| 26 | * @example |
| 27 | * |
| 28 | * function greet(greeting, name) { |
| 29 | * return greeting + ' ' + name; |
| 30 | * } |
| 31 | * |
| 32 | * var greetFred = _.partialRight(greet, 'fred'); |
| 33 | * greetFred('hi'); |
| 34 | * // => 'hi fred' |
| 35 | * |
| 36 | * // Partially applied with placeholders. |
| 37 | * var sayHelloTo = _.partialRight(greet, 'hello', _); |
| 38 | * sayHelloTo('fred'); |
| 39 | * // => 'hello fred' |
| 40 | */ |
| 41 | var partialRight = baseRest(function(func, partials) { |
| 42 | var holders = replaceHolders(partials, getHolder(partialRight)); |
| 43 | return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders); |
| 44 | }); |
| 45 | |
| 46 | // Assign default placeholders. |
| 47 | partialRight.placeholder = {}; |
| 48 | |
| 49 | module.exports = partialRight; |