JS string to array, go to object method

1. Array to string join

    var aarr = [1,2,2,2,2,3]    varnull;     = Aarr.join ("-");    Console.log (SSTR)//1-2-2-2-2-3    sStr = aarr.join ("+");    Console.log (SSTR)//1+2+2+2+2+3

2. String to Array

    var sStr = "Abc,abcd,aaa";     var NULL ;     = Sstr.split (",")    Console.log (Aarr)//  ["abc", "ABCD", "AAA"]    Aarr = Sstr.split ("")    Console.log (Aarr)//["A", "B", "C", ",", "a", "B", "C", "D", ",", "a", "a" , "a"]    Aarr = Sstr.split ("-")    Console.log (Aarr)//["ABC,ABCD,AAA"] the    // string to array is cut into several strings by the split parameter and returned as an array

3. Transfer JSON string objects (note is JSON string)

    varOobj ={name:Beijing, Age:1800, Value:Capital    }    varSSTR =json.stringify (oobj); Console.log (SSTR)//{"name": "Beijing", "Age": 1800, "value": "Capital"}Console.log (typeofSSTR)//string    varSjsonstr = ' {' name ': ' Beijing ', ' age ': 1800, ' value ': ' Capital '} 'varOjsonobj =json.parse (SJSONSTR) console.log (ojsonobj)//{name: "Beijing", age:1800, Value: "Capital"}Console.log (typeofOjsonobj)//Object

4, non-string through Json.parse to object

var sstring = ' 121212 '    var sjsonstring = json.parse (sstring)    Console.log (sjsonstring)  //121212    console.log (typeof//number    var sstring = ' nanjign '    var//uncaught syntaxerror:unexpected token A in JSON at posit Ion 1

By running the code, it is known that JS converts a string to another type of data. Try not to error, every opportunity.

　

　　

JS string to array, go to object method