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123 lines
3.2 KiB
JavaScript
123 lines
3.2 KiB
JavaScript
/**
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* lodash 3.1.3 (Custom Build) <https://lodash.com/>
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* Build: `lodash modern modularize exports="npm" -o ./`
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* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.8.2 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var baseIsMatch = require('lodash._baseismatch'),
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keys = require('lodash.keys');
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/**
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* The base implementation of `_.matches` which does not clone `source`.
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*
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* @private
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* @param {Object} source The object of property values to match.
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* @returns {Function} Returns the new function.
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*/
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function baseMatches(source) {
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var props = keys(source),
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length = props.length;
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if (!length) {
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return constant(true);
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}
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if (length == 1) {
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var key = props[0],
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value = source[key];
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if (isStrictComparable(value)) {
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return function(object) {
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return object != null && object[key] === value &&
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(typeof value != 'undefined' || (key in toObject(object)));
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};
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}
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}
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var values = Array(length),
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strictCompareFlags = Array(length);
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while (length--) {
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value = source[props[length]];
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values[length] = value;
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strictCompareFlags[length] = isStrictComparable(value);
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}
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return function(object) {
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return object != null && baseIsMatch(toObject(object), props, values, strictCompareFlags);
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};
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}
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/**
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* Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
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*
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* @private
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` if suitable for strict
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* equality comparisons, else `false`.
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*/
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function isStrictComparable(value) {
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return value === value && (value === 0 ? ((1 / value) > 0) : !isObject(value));
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}
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/**
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* Converts `value` to an object if it is not one.
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*
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* @private
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* @param {*} value The value to process.
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* @returns {Object} Returns the object.
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*/
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function toObject(value) {
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return isObject(value) ? value : Object(value);
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}
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/**
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* Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
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* (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
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*
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* @static
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* @memberOf _
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is an object, else `false`.
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* @example
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*
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* _.isObject({});
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* // => true
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*
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* _.isObject([1, 2, 3]);
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* // => true
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*
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* _.isObject(1);
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* // => false
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*/
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function isObject(value) {
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// Avoid a V8 JIT bug in Chrome 19-20.
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// See https://code.google.com/p/v8/issues/detail?id=2291 for more details.
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var type = typeof value;
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return type == 'function' || (!!value && type == 'object');
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}
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/**
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* Creates a function that returns `value`.
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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 {*} value The value to return from the new function.
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* @returns {Function} Returns the new function.
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* @example
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*
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* var object = { 'user': 'fred' };
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* var getter = _.constant(object);
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*
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* getter() === object;
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* // => true
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*/
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function constant(value) {
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return function() {
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return value;
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};
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}
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module.exports = baseMatches;
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