JavaScript表达式运算符简要学习笔记的相关内容

文章 2016-05-20 来自：开发者社区

JavaScript权威设计--JavaScript表达式与运算符(简要学习笔记五)

1.3种原始表达式 1.直接量： 1.23 //数字直接量 “hello” //字符串直接量 &n...

文章 2016-05-20 来自：开发者社区

JavaScript权威设计--JavaScript表达式与运算符,语句(简要学习笔记六)

1.delete是一元操作符，用来删除对象属性或者元素。 var a={ x:1, y:2 } delete a.x; //删除x属性 “x”in a //false；a对象中已经不存在x属性 alert(a.x) //undefined;这里还是存在“东西”的就如： var b=[1,2,3]; delete b[0]; b.length ...

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