Zero length String comparison

Use the Len function instead of IS ""

Type: performance
Severity: (3)

Incorrect example

<cfif form.email IS "">
  Hey enter a email address
</cfif>

Resolution

<cfif NOT Len(form.email)>
  Hey enter a email address
</cfif>

Explanation

Use the Len function to check for zero length strings, you will reap a small performance benefit. The use of IS "" is slightly more readable, so there is a tradeoff between performance and readibility.