RE: left zero pad digit string

Joel writes:
> Padding a number:
> Requirement: zero pad a digit string 
> Example: 456 --> 000456
> Where the new string length is a passed parameter to the 
> padding template.

Joel,

I believe that format-number( "456", "000000" )
would return "000456". The 2nd arg is the format
pattern.

In your case, the number of zeroes in the format
pattern must be equal to the "new string length."
You can use the substring function to construct
a format pattern with the appropriate number of 
zeroes as follows:

substring( $long_string_of_zeroes, 1, $new_string_length )

Note that I haven't tested any of this.
Hope it helps.

Bob

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