Function check number return to image in javascript

How to create function replace number to image? Example: var dd="123" I want to create function replace value of dd to image.

if 开发者_Go百科1=image1
if 2=image2
if 3=image3

How to do that? Please provide coding.

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function imageReplace ( str ) {
    var arr = str.split('');
    var returnArr = new Array();
    for(var i in arr ){
        returnArr.push("image"+arr[i]);
    }
    return returnArr;
}

I think thats what your looking for

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Hard to answer because of the lack of expected flow control, but something like this:

function concatFilename(str,index)
{
   return 'image'+str[index];
}

Usage:

var dd = 'abc123';
for (var i=0; i < dd.length; i++)
{
  console.log(concatFilename(dd, index));      
}

Or... easier:

dd[2] = 'c';

---

Does dd contain a single number, to be converted as a whole? If so:

var dd = '123';
dd.replace(/([\d]+)/, /image$1/);  // 'image123'

If you want each digit to be converted:

var dd = '123';
dd.replace(/([\d])/, /image$1/);  // 'image1image2image3'

Hope that helps. :)

Honestly, I'm assuming you almost certainly want the first of the two. (If in doubt, ask yourself -- what behavior do you expect if you're on image 10 or 11?)

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You can use a regular expression to replace each digit with an image tag:

dd = dd.replace(/(\d)/g, '<img src="image$1.gif" alt="$1" />');

This also works on a string containing numbers, like "Page 12 of 42" is turned into "Page <img src="image1.gif" alt="1" /><img src="image2.gif" alt="2" /> of <img src="image4.gif" alt="4" /><img src="image2.gif" alt="2" />".

---

var getImages = function(s) {
  var images=[], ss=(""+s).split(''), len=ss.length, i;
  for (i=0; i<len; i++) {
    images.push("image" + ss[i] + ".gif");
  }
  return images;
};
getImages(123); // => ["image1.gif", "image2.gif", "image3.gif"]
getImages(42); // => ["image4.gif", "image2.gif"]
getImages(0); // => ["image0.gif"]

[Edit] or perhaps something like this?

var getImageNames = function(s) {
  return (""+s).split('').map(function(x) {
    return '"image'+x+'.gif"';
  }).join(' ');
}
getImageNames(123); // => '"image1.gif" "image2.gif" "image3.gif"'