JavaScript中没有大括号的Lambda函数语法 [英] Lambda function syntax in JavaScript without curly braces

问题描述

  f = function（x）x + 1; 
f（17）//给出18 
  

有谁知道这到底是怎么回事？这是在任何标准？其他浏览器是否也接受它？ （我测试了IE 8，它给了我语法错误）

解决方案

这不是标准的一部分。该文档位于 https://developer.mozilla.org/en /New_in_JavaScript_1.8#Expression_closures_%28Merge_into_own_page.2fsection%29

关于在这些行中添加一些语法的讨论甚至更短的标准。请参阅 http://wiki.ecmascript.org/doku.php?id=strawman： short_function_syntax

I just found out that the following (awesome) syntax is accepted by Firefox

f = function(x) x+1;
f(17) //gives 18

Does anyone know what the hell is going on here? Is this in any standard? Do other browsers also accept it? (I tested IE 8 and it gave me syntax error)

解决方案

This isn't part of a standard. The documentation is at https://developer.mozilla.org/en/New_in_JavaScript_1.8#Expression_closures_%28Merge_into_own_page.2fsection%29

There's discussion about adding some syntax along these lines or even shorter to the standard. See http://wiki.ecmascript.org/doku.php?id=strawman:shorter_function_syntax

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