Angular service is struggling to execute the FOR LOOP, but surprisingly the WHILE LOOP is functioning perfectly

This particular issue was baffling me for a while, so I decided to address it here because it's quite unusual.

I attempted to cycle through a string within a service using a for loop, but unfortunately, I couldn't make it work as expected.

Here's how the service was defined:

.service('xtratxt', function()
 {
   var x = 0;
   var a = "";

   this.convert = function(srctxt)
   {
     this.a = "";
     this.x = 0;
     for (this.x=0; this.x++; this.x<srctxt.length)
     {
       this.a = ans + "X";
     }
     return ans;
   };
 })

When I called this method in my controller with 

$scope.newvalu = xtratxt.convert("Hello");

I was expecting to receive a string of X's like XXXXX. However, all I got back was an empty string "".

Surprisingly, when I switched to using a while loop instead, everything worked perfectly.

Does anyone have any insights into why this might be happening?

There were no errors showing up in the console either. As far as I can tell, it doesn't appear to even enter the for loop at all.

javascriptangularjsfor-loopservice

Answer №1

function encodeString(input) {
    let encoded = "";
    for (let i = 0; i < input.length; i++) {
        encoded += "X";
    }
    return encoded;
};

Concise version

var str = 'hello';
str.replace(/\w/gi, 'X');

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