Common:Convert Variables to Numbers

When you want to do calculations on a currency field in Velocity, you need to create a number from the currency strings delivered by the platform. That string has the form $24.95. The following code converts it into a number:

<syntaxhighlight lang="html4strict" enclose="div">

1. set($n = 0.00)
2. set($s = $YourObject.currency_field.substring(2) )
3. set($n = $n.parseDouble($s)

</syntaxhighlight> where:

• $n = 0.00 creates an instance of the double-precision float class (Double)
• $YourObject.currency_field.substring(2) removes the first two characters from the currency string. (The $ sign and the space that follows it.)
• parseDouble($s) converts the resulting string into a double-precision float--a number that can be used in calculations.