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Forum Discussion

MSZ's avatar
MSZ
Icon for Nimbostratus rankNimbostratus
Apr 30, 2018

RegExp Writing

Kindly elaborate the following Regular expression. How it will work?   (.)+.(xlsx|docx)  
ASM Advanced WAF
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security
Stanislas_Piro2's avatar
Stanislas_Piro2
Icon for Cumulonimbus rankCumulonimbus
Apr 30, 2018

Hi,

this expression will :

  • match any string ending with either xlsx or docx
  • store the first letter in the first match group
  • store xlsx or docx in the second match group

if you want the character before xlsx or docx is a dot, the expression must be : 

(.)+\.(xlsx|docx)

If you want to store the name without extension, and not the first character, the expression must be : 

(.+)\.(xlsx|docx)

If you don't want to store name value in match group, remove parenthesis: 

.+\.(xlsx|docx)

If you don't want to store extension in match group, add ?: after the opening parenthesis 

.+\.(?:xlsx|docx)

you can play with this on online services like this one