[RESOLVED] Increment Number In String

[fotofx]

I have a string "Slide1.jpg"

I need to increment it by 1 to say "Slide2.jpg"

I have split and sliced but I keep getting SlideNaN.jpg

Rather then fix my mess of code... There has to be a simple way of doing this..

Help, Thanks

My Brain Is Fried..

[WolfShade]

for(i=1;i<10;i++) {
    fileName = "Slide"+i+".jpg";
    document.writeln(fileName+"<br />");
    }

Rather simplistic and not exactly what you are looking for. But it might give some assistance in your quest.

Was trying to do it with RegEx, but don't have time to get into that, right now.. sorry.

[fotofx]

That would work if I knew the starting slide. I am getting the slide through AJAX and want to be able to locally increment by 1 to preview the next slide.

[clueful]

This will increment the first integer found in a string:

<script type="text/javascript">

function bumpStringInt( str )
{
  var data = str.match(/(\D*)(\d+)(\D*)/), newStr = "";

  if( data )    
    newStr = data[ 1 ] + ( Number( data[ 2 ] ) + 1 ) + data[ 3 ];
  
  return newStr || str;
}

alert( bumpStringInt( "Slide1.jpg" ) );

</script>

[rnd me]

"Slide1.jpg".replace(/(\d+)\./,function(j,a){return a- -1 +".";})

[fotofx]

"Slide1.jpg".replace(/(\d+)\./,function(j,a){return a- -1 +".";})

That's the ticket... Thanks

If anyone else needs to do this, the final code using the above is:

       var newSlide = currentSlide.replace(/(\d+)\./,function(j,a){return a- -1 +".";});
       document.myimagepre.src = newSlide;