//用一般的字符，例如@或,等符号做分隔符
        let String = "2147, 7072,1505,7044";
        let objArray = String.split(",");
        console.log(objArray); //['2147', ' 7072', '1505', '7044']
        
        
        let arrString= '["陕西省", "西安市", "高新区"]'
        let objArray = eval("(" +  arrString  + ")" )
        console.log(objArray )  //  ["陕西省", "西安市", "高新区"]


        let arrString= '["陕西省", "西安市", "高新区"]'
        let objArray = eval(arrString)
        console.log(objArray)  //  ["陕西省", "西安市", "高新区"]

        
        //使用ES6扩展运算符
        var str ="今天天气真不错";
        console.log([...str]);  //  ['今', '天', '天', '气', '真','不','错']

        //语法：Array.from(str)
        var str ="今天天气真不错";
        console.log(Array.from(str));  // ['今', '天', '天', '气', '真','不','错']

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