1
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var baseRest = require('./_baseRest'),
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2
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createWrap = require('./_createWrap'),
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3
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getHolder = require('./_getHolder'),
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4
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replaceHolders = require('./_replaceHolders');
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5
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6
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/** Used to compose bitmasks for function metadata. */
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7
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var WRAP_PARTIAL_FLAG = 32;
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8
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9
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/**
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10
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* Creates a function that invokes `func` with `partials` prepended to the
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11
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* arguments it receives. This method is like `_.bind` except it does **not**
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12
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* alter the `this` binding.
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13
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*
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14
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* The `_.partial.placeholder` value, which defaults to `_` in monolithic
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15
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* builds, may be used as a placeholder for partially applied arguments.
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16
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*
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17
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* **Note:** This method doesn't set the "length" property of partially
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18
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* applied functions.
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19
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*
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20
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* @static
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21
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* @memberOf _
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22
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* @since 0.2.0
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23
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* @category Function
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24
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* @param {Function} func The function to partially apply arguments to.
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25
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* @param {...*} [partials] The arguments to be partially applied.
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26
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* @returns {Function} Returns the new partially applied function.
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27
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* @example
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28
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*
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29
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* function greet(greeting, name) {
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30
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* return greeting + ' ' + name;
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31
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* }
|
32
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*
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33
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* var sayHelloTo = _.partial(greet, 'hello');
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34
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* sayHelloTo('fred');
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35
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* // => 'hello fred'
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36
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*
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37
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* // Partially applied with placeholders.
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38
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* var greetFred = _.partial(greet, _, 'fred');
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39
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* greetFred('hi');
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40
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* // => 'hi fred'
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41
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*/
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42
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var partial = baseRest(function(func, partials) {
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43
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var holders = replaceHolders(partials, getHolder(partial));
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44
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return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
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45
|
});
|
46
|
|
47
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// Assign default placeholders.
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48
|
partial.placeholder = {};
|
49
|
|
50
|
module.exports = partial;
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