Double extension

[Bechara.abouraha]

Dears,

how can we block double extension ?

can someone tell me the regular expresion for it?

thanks            

[Andreas Mueller]

Hi Bechara,

should be something like  \..*\..*$ 

.\ means a dot, this one needs to be escaped woth the backslash

.* means a string with any number of characters

If you want to restrict that to three letter extensions only (i.e. .exe.pif), then a quick and dirty way would be like this:

\....\....$

Hope that helps,

Andreas