Javascript笔记03：易犯错的比较运算

1.比较两个值是否相等的常见运算：

""   == "0"                          //false
0    == ""                            //true
0    == "0"                          //true
false == "false"                  //false
false == "0"                        //false
false   == undefined           //false
false  == null                      //false
null == undefined              //false
"\t\r\n"   == 0                    //false

2.比较两个值是否全等的常见运算   

""   === "0"                          //false
0    === ""                            //false
0    === "0"                          //false
false === "false"                  //false
false === "0"                       //false
false   === undefined           //false
false  === null                      //false
null === undefined              //false
"\t\r\n"   === 0                    //false

3.无穷大的比较

Infinity>10                   //true
Infinity>"abc"              //false
Infinity<"abc"             //false
Infinity=="abc"           //false
Infinity==NaN            //false