mirror of
https://github.com/whoisclebs/lodash.git
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89 lines
2.5 KiB
JavaScript
89 lines
2.5 KiB
JavaScript
/**
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* lodash 4.0.1 (Custom Build) <https://lodash.com/>
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* Build: `lodash modularize exports="npm" -o ./`
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* Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2016 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 rest = require('lodash.rest');
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/**
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* A faster alternative to `Function#apply`, this function invokes `func`
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* with the `this` binding of `thisArg` and the arguments of `args`.
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*
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* @private
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* @param {Function} func The function to invoke.
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* @param {*} thisArg The `this` binding of `func`.
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* @param {...*} args The arguments to invoke `func` with.
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* @returns {*} Returns the result of `func`.
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*/
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function apply(func, thisArg, args) {
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var length = args.length;
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switch (length) {
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case 0: return func.call(thisArg);
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case 1: return func.call(thisArg, args[0]);
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case 2: return func.call(thisArg, args[0], args[1]);
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case 3: return func.call(thisArg, args[0], args[1], args[2]);
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}
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return func.apply(thisArg, args);
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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(_.noop);
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* // => true
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*
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* _.isObject(null);
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* // => false
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*/
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function isObject(value) {
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var type = typeof value;
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return !!value && (type == 'object' || type == 'function');
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}
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/**
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* Attempts to invoke `func`, returning either the result or the caught error
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* object. Any additional arguments are provided to `func` when it's invoked.
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*
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* @static
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* @memberOf _
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* @category Util
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* @param {Function} func The function to attempt.
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* @returns {*} Returns the `func` result or error object.
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* @example
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*
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* // Avoid throwing errors for invalid selectors.
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* var elements = _.attempt(function(selector) {
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* return document.querySelectorAll(selector);
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* }, '>_>');
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*
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* if (_.isError(elements)) {
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* elements = [];
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* }
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*/
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var attempt = rest(function(func, args) {
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try {
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return apply(func, undefined, args);
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} catch (e) {
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return isObject(e) ? e : new Error(e);
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}
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});
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module.exports = attempt;
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