如何在javascript中的字符串的第二行添加文本？

Question

Suppose my string is:

 var string ="abcd                  
 acdcd  
 ejhwejeh  
 kjkjewkjkejw";  

and I want to add a text in front of the 2nd line called "hello " so it becomes.

string ="abcd                  
 hello acdcd  
 ejhwejeh  
 kjkjewkjkejw";    

How would I achieve this?

Answer 1

Split the string at the newlines with

var arr = string.split(/\r?\n/);

That gives you an array with the single words, which you can put together again with the new word.

var string2  = '';  

    for (var i = 1; i < arr.length; i++) {
      string2 = string2 + arr[i]
}

string2 = arr[0] + 'hello' + string2

Answer 2

You could split the string with linefeed and change the array with the wanted part and joinf the array to a new string.

 var string ="abcd\\nacdcd\\nejhwejeh\\nkjkjewkjkejw", temp = string.split(/\\n/); temp[1] = 'hello ' + temp[1]; console.log(temp.join('\\n'));