asked on

How do I generate a range of letters A-ZZZ with Javascript?

I need help creating a a loop that generates a range of letters. For example I could specify A to ZZZ and it would generate :

a
b
c
..
..
..
x
y
z
aa
ab
ac
..
..
..
zzx
zzy
zzz

russellC

This should get you started. 65 - 90 = ASCII "A - Z"

To get your AA to ZZZ you can nest the loops.

for (var i =65; i < 91; i++)
{
     alert(String.fromCharCode(i));
}

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infochandru

Hope this helps you

<html>
<head>
<script type="text/javascript">
function print()
  {
  var arr = new Array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z");

  for(i=0; i<arr.length;i++)
  {
   document.write(arr[i]+"<br>");
  }
  for(i=0; i<arr.length;i++)
  {
   for(j=0;j<arr.length;j++)
   {
    document.write(arr[i]+arr[j]+"<br>");
   }
  }
  for(i=0; i<arr.length;i++)
  {
   for(j=0;j<arr.length;j++)
   {
    for(k=0;k<arr.length;k++)
    {
     document.write(arr[i]+arr[j]+arr[k]+"<br>");
    }
   }
  }
  }
</script>
</head>
<body>
<input type="button" value="Print"
onclick="print()" />

</body>
</html>

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leakim971

Hello TotallyMe,

Try this :

<html>
<head>
<script>
	function generateThree() {
		for(a=96;a<123;a++) {
			for(b=96;b<123;b++) {
				for(c=97;c<123;c++) {
						alert(String.fromCharCode(c) + String.fromCharCode((b==96)?32:b) + String.fromCharCode((a==96)?32:a));
				}
			}
		}
		
	}
</script>
<body onload="generateThree()">
</body>
</html>

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Gurvinder Pal Singh

try this

function createChars()
            {
                  for ( var counter1 = 0; counter1 < 26; counter1++)
                  {
                        for ( var counter2 = 0; counter2 < 26; counter2++)
                        {
                              for ( var counter3 = 0; counter3 < 26; counter3++)
                              {
                                    var value= ""
                                    if (counter1 != 0 )
                                     value = String.fromCharCode(counter1+65)
                                    if (counter1 != 0 || counter2 != 0 )
                                     value = value + String.fromCharCode(counter2+65)
                                    //if (counter3 != 0 )
                                    value = value + String.fromCharCode(counter3+65)
                                    document.writeln(value + "<BR>");
                              }
                        }
                  }
            }

TotallyMe

ASKER

leakim971 and gurvinder372 I really like your methods, I'm just wondering would it be possible so that when I call the function I could specify how many characters to generate. For example :

generateRange(1); // Generates A-Z
generateRange(2); // Generates A-ZZ
generateRange(3); // Generates A-ZZZ
generateRange(4); // Generates A-ZZZZ

TotallyMe

ASKER

Also I'm not sure if it helps but I'm also using jQuery so you can use any of the jQuery functions

russellC

Try this recursion function

// JavaScript Document
function createChars(range)
{
    var value = null;
    var rangeCounter = 0;
    
    createList(value);
        
    function createList(value)
    {
        for ( var counter1 = 0; counter1 < 26; counter1++)
        {
            value = value + String.fromCharCode(counter1+65); 
            
            if (rangeCounter < range)
            {
                rangeCounter++:
                value = value + createList(value);
            }        
        }
    }  
}

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TotallyMe

ASKER

russellC: Thanks, I've played around with it but it doesn't appear to return any values.

russellC

were not quite there yet but we are getting close. I am finally at home now let me take a look at it for a bit and Ill send you a working function now that I can test it myself

ASKER CERTIFIED SOLUTION

leakim971

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TotallyMe

ASKER

Thanks leakim971 had a look at that but noticed it was throwing some weird characters. I've been playing around and I think I've solved it, this is what I've come up with :

Let me know if it could be done better.

<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script>
function get(x,app){
 var x1 = '';
 var c
	for(c=97;c<123;c++) {
			if(x-1>0){
				 x1 += get(x-1,String.fromCharCode(c)+app)
			}else{
				x1 +=String.fromCharCode(c)+app
				x1 +='<br>'
			}
  }
	return x1
}

function createRange(num) {
	for(a=1;a<=num;a++) {
			$('#result').append(get(a,''))
	}
}
				
</script>
</head>

<body onLoad="createRange(3)">
  <div id="result"></div>
</body></html>

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leakim971

You're welcome!
Weird characters ? I don't see them :(

Your code feel good!

leakim971

Thanks for the points!