KevinZou

邹明潮 AngularJS Promise

Promise

Promise is an attempt to address the problems caused by callback. It bundles the future results of an asynchronous call into an object. AngularJS Promise is implemented by pairs of deferred and promise objects that are made of a promise chain, and the…

邹明潮 Notes: YDKJS Promise

JavaScript

JavaScript is a single-threaded, non-blocking, asynchronous and concurrent language, because DOM-tree is not thread-safe.

• All our JavaScript code should run in the same execution context such as stack

邹明潮 Notes: YDKJS Scope & Closure

Scope

Scope is the set of rules that determines where and how a variable (identifier) can be looked up.

Lexical Scope