Javascript Auto Increment Code not working-CodePudding

I need to generate 1000 images each with different numbers. Doing this is found a script online which works fine, but it doesn't work with 00 in front of the increments.

I can't just add 00 in front of every number because when it hits 10 it's doing 0010 instead of 010 like I want it to.

That means I need to change the code a bit. And it's probably REALLY basic, but I just can't figure it out. There is no log sadly, because I am running the script in Photoshop.

Here is the code I have trouble with. And underneath is the result:

  for (var i=1; i <= numImages; i  ) {
    
    if(layer.textItem.contents < 10) {
      layer.textItem.contents = "00"   i.toString();
    } else if(layer.textItem.contents >= 10) {
     layer.textItem.contents = "0"   i.toString();
    } else {
      layer.textItem.contents = i.toString();
    }
    SavePNG(directory   imageName   '_'  i  '.png');
  };

Any assistance is highly appreciated! I don't need to be fed by a spoon! I need to learn from my mistakes!

CodePudding user response：

You can add the number to a string of zeroes, and then slice the resulting string based on desired length:

var template = "0000";
var num = 0;
var targetNumber = 1000;


for(let i = 0; i <= targetNumber; i  ) {
    // add i to the template. Javascript will automatically to this type-coerceon since we're adding string   number
  let numStr = template   i;
  // strip leading zeroes to match the template length
  numStr = numStr.slice(numStr.length - template.length);
  console.log(numStr);
}

CodePudding user response：

You could try it this way:

for (var i=1; i <= numImages; i  ) {
    var str = ""   i;
    var pad = "000";
    var ans = pad.substring(0, pad.length - str.length)   str;
    SavePNG(directory   imageName   '_'  ans  '.png');
  };

You can change pad template as you wish. The output of this will be:

1 -> 001

97 -> 097

999 -> 999

1234 -> 1234