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83 lines
2.4 KiB
JavaScript
83 lines
2.4 KiB
JavaScript
9 years ago
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var arrayCopy = require('../internal/arrayCopy'),
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arrayPush = require('../internal/arrayPush'),
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baseFunctions = require('../internal/baseFunctions'),
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isFunction = require('../lang/isFunction'),
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isObject = require('../lang/isObject'),
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keys = require('../object/keys');
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/**
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* Adds all own enumerable function properties of a source object to the
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* destination object. If `object` is a function then methods are added to
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* its prototype as well.
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*
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* **Note:** Use `_.runInContext` to create a pristine `lodash` function to
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* avoid conflicts caused by modifying the original.
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*
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* @static
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* @memberOf _
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* @category Utility
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* @param {Function|Object} [object=lodash] The destination object.
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* @param {Object} source The object of functions to add.
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* @param {Object} [options] The options object.
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* @param {boolean} [options.chain=true] Specify whether the functions added
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* are chainable.
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* @returns {Function|Object} Returns `object`.
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* @example
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*
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* function vowels(string) {
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* return _.filter(string, function(v) {
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* return /[aeiou]/i.test(v);
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* });
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* }
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*
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* _.mixin({ 'vowels': vowels });
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* _.vowels('fred');
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* // => ['e']
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*
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* _('fred').vowels().value();
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* // => ['e']
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*
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* _.mixin({ 'vowels': vowels }, { 'chain': false });
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* _('fred').vowels();
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* // => ['e']
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*/
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function mixin(object, source, options) {
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var methodNames = baseFunctions(source, keys(source));
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var chain = true,
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index = -1,
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isFunc = isFunction(object),
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length = methodNames.length;
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if (options === false) {
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chain = false;
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} else if (isObject(options) && 'chain' in options) {
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chain = options.chain;
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}
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while (++index < length) {
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var methodName = methodNames[index],
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func = source[methodName];
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object[methodName] = func;
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if (isFunc) {
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object.prototype[methodName] = (function(func) {
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return function() {
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var chainAll = this.__chain__;
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if (chain || chainAll) {
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var result = object(this.__wrapped__),
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actions = result.__actions__ = arrayCopy(this.__actions__);
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actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
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result.__chain__ = chainAll;
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return result;
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}
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return func.apply(object, arrayPush([this.value()], arguments));
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};
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}(func));
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}
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}
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return object;
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}
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module.exports = mixin;
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