How to add spaces between every character in a string?

I am trying to create a function that inserts spaces between the characters of a string argument then return a new string which contains the same charact开发者_运维知识库ers as the argument, separated by space characters.

E.g.

Hello

becomes

H e l l o

I'm a massive novice and I'm sure that this might seem like a no-brain'er to some people, but I just can't seem to get my head around it.

You can use the split() function to turn the string into an array of single characters, and then the join() function to turn that back into a string where you specify a joining character (specifying space as the joining character):

function insertSpaces(aString) {
  return aString.split("").join(" ");
}

(Note that the parameter to split() is the character you want to split on so, e.g., you can use split(",") to break up a comma-separated list, but if you pass an empty string it just splits up every character.)

That's quite easy... just call the replace method on the string as follow...

var str = "Hello";
console.info(str.replace(/\B/g, " ");

What am I doing here is replacing on non-word boundary which is inside the word. It's just reverse of the word boundary denoted by "\b", which is around the word; think it as if you are matching the border of the word.

function insertSpaces(aString)
{
  return aString.split('').join(' ');
}

Alternative for a split and join solution could be:

'Hello'.replace(/(.(?!$))/g,'$1 '); //=> H e l l o
 //               ^all characters but the last
 //                          ^replace with found character + space

Or in a function:

function insertChr(str,chr) {
  chr = chr || ' '; //=> default is space
  return str.replace(/(.(?!$))/g,'$1'+chr);
}
//usage
insertChr('Hello');     //=> H e l l o
insertChr('Hello','-'); //=> H-e-l-l-o

or as a String prototype function:

String prototype.insertChr(chr){
  chr = chr || ' '; //=> default is space
  return this.replace(/(.(?!$))/g,'$1'+chr);
}
//usage
'Hello'.insertChr();    //=> H e l l o
'Hello'.insertChr('='); //=> H=e=l=l=o