Question

i want a generic method using javascript to convert

the values like first floor, second floor, ground floor will be converted to below format,

Ground Floor: Gr. Floor
First Floor: 1st Floor
Twenty floor: 20th Floor

right now i am using following code
but that not the correct way as i cannot write for all the floors (50th floor,90th floor) so please help me with this

function validpress(iKeyascii)   
 {
if( iKeyascii=='77'||iKeyascii=='76'||iKeyascii=='68'||iKeyascii=='73'||iKeyascii=='88'||iKeyascii=='86'||iKeyascii=='67')
{
alert("Roman numbers are not allowed.");    
return false;
}   
var txt= document.getElementById('<%=TextBox1.ClientID %>').value;
//document.getElementById('<%=TextBox1.ClientID %>').value = txt.toUpperCase();
 var patternforGFloor = new RegExp('\\b[G|g][R|r][O|o][U|u][n|N][D|d]*\\.*\\s*[F|f][L|l][O|o][O|o][R|r]\\b');
var patternfor1Floor = new RegExp('\\b[F|f][I|i][R|r][S|s][T|t]*\\.*\\s*[F|f][L|l][O|o][O|o][R|r]\\b');
var patternfor2Floor = new RegExp('\\b[S|s][E|e][C|c][O|o][N|n][D|d]*\\.*\\s*[F|f][L|l][O|o][O|o][R|r]\\b');

var patternfor3Floor = new RegExp('\\b[T|t][H|h][I|i][R|r][D|d]*\\.*\\s*[F|f][L|l][O|o][O|o][R|r]\\b');
var patternfor4Floor = new RegExp('\\b[F|f][O|o][U|u][R|r][T|t][H|h]*\\.*\\s*[F|f][L|l][O|o][O|o][R|r]\\b');
var patternfor5Floor = new RegExp('\\b[F|f][I|i][F|f][T|t][H|h]*\\.*\\s*[F|f][L|l][O|o][O|o][R|r]\\b');


     if (txt.match(patternforGFloor) )
     {
     document.getElementById ('<%=TextBox1.ClientID %>').value=txt.replace(patternforGFloor,"Gr.Floor");
     }

      if (txt.match(patternfor1Floor))
     {

     document.getElementById ('<%=TextBox1.ClientID %>').value=txt.replace(patternfor1Floor,"1st. Floor");
     }

     if (txt.match(patternfor2Floor) )
     {
     document.getElementById ('<%=TextBox1.ClientID %>').value=txt.replace(patternfor2Floor,"2nd.Floor");
     }

      if (txt.match(patternfor3Floor))
     {

     document.getElementById ('<%=TextBox1.ClientID %>').value=txt.replace(patternfor3Floor,"3rd. Floor");
     }
  if (txt.match( patternfor4Floor))
     {

     document.getElementById ('<%=TextBox1.ClientID %>').value=txt.replace( patternfor4Floor,"4th. Floor");
     }

if (txt.match( patternfor5Floor))
     {

     document.getElementById ('<%=TextBox1.ClientID %>').value=txt.replace( patternfor5Floor,"5th. Floor");
     }

 }

Answer 1

First of all, your Regexen are madness. Use the case-insensitive flag /i and use Regex literals so you don’t have to escape everything twice:

var patternfor1Floor = /\bfirst\s*floor\b/i;

Second, you’ll want find the patterns in the English language and reuse them:

first, twenty-first, one-hundred-twenty-first
second, twenty-second, one-hundred-twenty-second

The “first” and “second” parts are repetitive, so you only need to define first through ninth and their values once. The same goes for twenty, thirty and hundred, thousand etc. So you can break down a number like one-hundred-twenty-first into “(one) hundred”, “twenty” and “first” and add the values. “eleven” through “nineteen” are exceptions you’ll need to recognize separately.

Adding a st, nd, rd or th to the end of the number is trivial by looking at its last digit.

I can’t and won’t give you a complete solution here, try to get somewhere with this.