You can use number as function/variable name, the numberic name can't be accessed from parent scope, but can be accessed by 'this' in private scope. var o= { attr1:'value of attr1', 1:'private attr ,the index is 1', 301:function(){ console.log('priva…
来源 :http://www.codelifter.com/main/tips/tip_020.shtml The following are the rules for naming JavaScript variables: 1. A variable name cannot start with a numeral. For instance, 3x or 2goats or 76trombones would all be illegal variable names. You can,…
Objects Object Usage and Properties Everything in JavaScript acts like an object, with the only two exceptions being null and undefined. false.toString(); // 'false' [1, 2, 3].toString(); // '1,2,3' function Foo(){} Foo.bar = 1; Foo.bar; A common mis…
原文:https://www.infinum.co/the-capsized-eight/articles/running-javascript-in-an-ios-application-with-javascriptcore Although the JavaScriptCore framework has been officially available to iOS and Mac developers for quite some time now, its features are…
An alternative, that may get you rejected from the app store, is to use WebScriptObject. These APIs are public on OSX but are not on iOS. You need to define interfaces to the internal classes. @interface WebScriptObject: NSObject @end @interface WebV…
This article is a combined effort of Innofied Javascript developers Puja Deora and Subhajit Ghosh) We have been working on a project for past 8 months (ongoing). Over the course of this project, we have learnt that small tweaks to general coding prac…
comp.lang.javascript FAQ Version 32.2, Updated 2010-10-08, by Garrett Smith FAQ Notes 1 Meta-FAQ meta-questions 1.1 Which newsgroups deal with javascript? 1.2 What questions are on-topic for comp.lang.javascript? 1.3 What should I do before posting t…
MongoDB is very powerful, but it is still easy to get started with. In this chapter we’ll introduce some of the basic concepts of MongoDB: • A document is the basic unit of data for MongoDB, roughly equivalent to a row in a relational database manage…
Note to the Reader - Docs Being Revised for Selenium 2.0! Introduction Test Automation for Web Applications To Automate or Not to Automate? Introducing Selenium Brief History of The Selenium Project Selenium’s Tool Suite Choosing Your Selenium Tool S…
原文:http://www.bignerdranch.com/blog/javascriptcore-and-ios-7/ As a rule, iOS programmers don't think much about JavaScript. We spend our days swimming in C andObjective-C, while occasionally dipping our toes into the waters of C++. But JavaScript has…
原文链接:Understanding Data Types in JavaScript Data types are used to classify one particular type of data in programming languages. For instance, a number and a string of characters are different types of data that will be treated differently by JavaSc…
原文链接:ES6 Syntax and Feature Overview View on GitHub Keyword Scope Hoisting Can Be Reassigned Can Be Redeclared var Function scope Yes Yes Yes let Block scope No Yes No const Block scope No No No Understanding Variables, Scope, and Hoisting in JavaScr…
javascript里怎么检查一个未定义的变量? in JavaScript null is an object. There's another value for things that don't exist, undefined. The DOM returns null for almost all cases where it fails to find some structure in the document, but in JavaScript itself undefine…
https://stackoverflow.com/questions/762011/whats-the-difference-between-using-let-and-var-to-declare-a-variable-in-jav 答案1 The difference is scoping. var is scoped to the nearest function block and let is scoped to the nearest enclosing block, which…
https://stackoverflow.com/questions/767486/how-do-you-check-if-a-variable-is-an-array-in-javascript 1137down voteaccepted There are several ways of checking if an variable is an array or not. The best solution is the one you have chosen. variable.con…
