st: Problem with parsing inputs to ado files

[Pradipto Banerjee <pradipto.banerjee@adainvestments.com>]

Hi,

I tend to use "drop if ..." a huge number of times - and so I decided to write a ado function just to reduce "drop if" from seven letters to four letters

---
program define drif

drop if `*'

end
---

However, the above code breaks down when there are strings. For instance, if will work fine as

. drif var1>cons1 & var2<cons2

but will not work when I try

. drif var1=="cons1" & var2~="cons2"

Is there any easy way to fix the ado function to handle strings properly?

Thanks



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