格式
"zifuchuan"
""
'zifuchuan'
str.length
"micromajor".length; //10
str.charAt(index)
"micromajor".charAt(0); //"m"
str.indexOf(searchValue)
"micro-major".indexOf("-"); //5
"micro-ma-jor".indexOf("-"); //5
"micromajor".indexOf("-"); //-1
str.search(regexp)
"micromajor163".search(/[0-9]/); //10 找1
"micromajor163".search(/[A-Z]/); //-1
str.match(regexp)
"micromajor163".match(/[0-9]/);//["1"]
"micromajor163".match(/[0-9]/g);//["1","6","3"]
"micromajor163".match(/[A-Z]/); //null
str.replace(regexp|substr,newSubstr)
"micromajor163".replace('163','###')
"micromajor163".replace(/[0-9]/g,'###')
"micromajor163".replace(/[0-9]/g,'')
str.substring(index[,index])截取字符串
"micromajor".substring(5,7)//"ma"
"micromajor".substring(5)//"major163"
str.slice()
"micromajor".slice(5,7) //"ma"
"micromajor".slice(5) // "major163"
"micromajor".slice(1,-1)//"icromajo"
"micromajor".slice(-3)//"jor"
str.substr(,length)
"micromajor".substr(5,2) //"ma"
"micromajor".substr(5) //"major"
str.split([separator])
"micro major".split(" ") //["micro","major"]
"micro major".split(" ",1) //["major"]
"micro2major".split("/[0-9]/",1) //["micro","major"]
連接
"0571"+"-"+"88888888" //0571-88888888
String()
String(163)//"163"
轉(zhuǎn)義
"micro\"major" //"micro"major"
"micro\\major" //"micro\major"
"micro\tmajor" //"micro major"
