3 conversion methods: 1. Use the join() function to put all the elements in the array into a string, the syntax is "array object.join (separator)"; 2. Use the toString() function, The syntax is "array object.toString()" or "array object.toString().replace(/,/gi,'separator')"; 3. Use the toLocaleString() function, the syntax is "array object.toLocaleString()".
The operating environment of this tutorial: Windows 7 system, ECMAScript version 6, Dell G3 computer.
Convert array to string (3 methods)
JavaScript allows conversion between arrays and strings. The Array method object defines three methods, which can convert arrays into strings, as shown in the table.
Array method |
Description |
|---|---|
toString() |
Convert the array into a string |
toLocaleString() |
Convert the array into a locally agreed string |
join() |
Joins array elements to build a string |
1: The join() method is used to put all the elements in the array into a string
The elements are specified by the delimiter Delimited
Separator specified by join() |
Description |
|---|---|
join() |
can be understood as directly becoming a string, with commas as default Separate |
join(' ') |
Empty connection |
join(',') or join(' - ') or join(' .') |
The comma in the middle is added manually, or it can be changed to something else such as,. ! -You can wait. |
// join() var a= ["00", "01", "02", "03", "04"] console.log(a) var b= a.join() console.log(b) console.log( typeof b) //打印结果 00,01,02,03,04
// join('') var a= ["00", "01", "02", "03", "04"] console.log(a) var b= a.join('') console.log(b) console.log( typeof b) //打印结果 0001020304
// join(',') var a= ["00", "01", "02", "03", "04"] var b= a.join(',') console.log(b) console.log( typeof b) //打印结果 00,01,02,03,04
// join('-') var a= ["00", "01", "02", "03", "04"] var b= a.join('-') console.log(b) console.log( typeof b) //打印结果 00-01-02-03-04
// join('！') var a= ["00", "01", "02", "03", "04"] var b= a.join('!') console.log(b) console.log( typeof b) //打印结果 00!01!02!03!04
2: The toString() method can convert a logical value into a string and return the result
var a= ["00", "01", "02", "03", "04"] console.log(a) var c = a.toString(); //把数组转换为字符串 console.log(c) console.log(typeof c); //返回字符串string，说明是字符串类型 //打印结果 00,01,02,03,04
The toString() method cannot specify the delimiter, but we can specify the replacement through the replace() method
var a= ["00", "01", "02", "03", "04"] var f = a.toString().replace(/,/gi,'-') console.log(f) //打印结果：00-01-02-03-04
3: toLocaleString()
Convert the array into a local agreed string
var a= ["00", "01", "02", "03", "04"] console.log(a) var e = a.toLocaleString(); console.log(e) console.log(typeof e); //打印结果：00,01,02,03,04
demo
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script ></script>
<title></title>
</head>
<body>
</body>
<script type="text/javascript">
var a= ["00", "01", "02", "03", "04"]
//1:
var b= a.join(',')
console.log(b)
console.log( typeof b)
//2:
var c = a.toString(); //把数组转换为字符串
console.log(c)
console.log(typeof c); //返回字符串string，说明是字符串类型
//3:
var d = a.join(); //把数组转换为字符串
console.log(d)
console.log(typeof d); //返回字符串string，说明是字符串类型
//4:
var e = a.toLocaleString(); //把数组转换为字符串
console.log(e)
console.log(typeof e); //返回字符串string，说明是字符串类型
</script>
</html>
Expand knowledge: Convert string to array (2 methods)
String method |
Description |
|---|---|
| # #split() method |
Convert a string into an array |
| Extension operation operator(...) |
Extension operator in es6 |
It is also used to split a string into a string array, split(','), split( ), split(' ') What is the difference?
|
|
|
|---|---|
|
|
|
|
|
2: The expansion operator in es6
var arr = 'aa,bb,cc,dd' var newStr = [...arr] console.log(newStr) //打印结果 ["a", "a", ",", "b", "b", ",", "c", "c", ",", "d", "d"][Related recommendations: javascript video tutorial,
programming video】
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