Regular expression - Decimal values 2

[stewartwebb]

I have several text fields, all are decimal numbers. Each decimal field is of different format e.g can be 123.45, 1234.56, 12345.67 etc.
Is there a way that I can pass the value of the field and the format (4,2 for example) and do a regular expression to check that the value matches the format?

Thanks for any help

 

[tsdragon]

function testDec(sVal,nDig,nDec) {
  var sRe = "^\d{" + nDig + "}\.\d{" + nDec + "}$";
  var re = new RegExp(sRe);
  if ( re.test(sVal) )
    // valid value
  else
    // invalid value
}

Tracy Dryden

Meddle not in the affairs of dragons,
For you are crunchy, and good with mustard.

 

[vbkris]

a small change to tracy's script:

var sRe = "^\d{1," + nDig + "}\.\d{1," + nDec + "}$";

set a range rather than fixed digits...


Known is handfull, Unknown is worldfull

 

[tsdragon]

Seems to me that your change pretty much defeats the purpose of what he wants to do. It looked like to me he wants to REQUIRE a SPECIFIC number of digits before and after the decimal. Otherwise he wouldn't need a function where he could pass the number of digits and decimals, just a generic function.


Tracy Dryden

Meddle not in the affairs of dragons,
For you are crunchy, and good with mustard.

 

[vbkris]

>> Each decimal field is of different format e.g can be 123.45, 1234.56, 12345.67

the maximum and minimum is 4 and 2...

Known is handfull, Unknown is worldfull

 

[stewartwebb]

Thanks for the help, much appreciated.

Stewart

 

[stewartwebb]

I've tried the above examples and this is what I now have -

var DecimalValueCorrect;
function check1DecimalValue(inputName,integer,decimal) 
  {
  var inputValue = inputName.value;
  var sRe = "^\d{1," + integer + "}\.\d{1," + decimal + "}$";
  alert(sRe + " " + inputValue)
  var re = new RegExp(sRe);
  if (re.test(inputValue))
    {
    DecimalValueCorrect = "Y";
	}
  else
    {
    DecimalValueCorrect = "N";
	}
}

Unfortunately this doesn't work. The only value it works for is when I enter 1 number.
Sorry if I didn't explain my problem properly in the first place but I do need a range. The maximum for example for the input field could be 7.2 but the user could enter a 4.2 or even a .2 and both of these are valid values.
Anyone have any ideas?

Cheers

Stewart.

 

[stewartwebb]

Sorry forget about the alert

Stewart

 

[vbkris]

<script>
var DecimalValueCorrect;
function check1DecimalValue(inputName,integer,decimal)
{
var inputValue = inputName;
var sRe = "^\\d{1," + integer + "}\.\\d{1," + decimal + "}$";
var re = new RegExp(sRe);
if (re.test(inputValue))
{
return "Y";
}
else
{
return "N";
}
}

alert(check1DecimalValue("5.23","5","2"))
</script>

Known is handfull, Unknown is worldfull

 

[stewartwebb]

Thanks vbkris but that still didn't work. It always returns N. Any other ideas?

 

[stewartwebb]

Don't worry it something else that was the problem, cheers vbkris

 

[vbkris]

One more bug:

<script>
var DecimalValueCorrect;
function check1DecimalValue(inputName,integer,decimal)
{
var inputValue = inputName;
var sRe = "^\\d{1," + integer + "}\\.\\d{1," + decimal + "}$";
var re = new RegExp(sRe);
if (re.test(inputValue))
{
return "Y";
}
else
{
return "N";
}
}

alert(check1DecimalValue("15123.0","5","2"))
</script>

Known is handfull, Unknown is worldfull