How to match for "foo" and "bar" with Select-String in Powershell?

Question

How to get the result of these Select-String matches in one statement?

posh> 
posh> $string = Get-Content /home/nicholas/powershell/regex/text.txt
posh> $patternFoo = 'foo'                                           
posh> $patternBar = 'bar'
posh> $string | Select-String $patternFoo -AllMatches | Select-String $patternBar -AllMatches

jfkldafdjlfoofkldasjf jfkdla jfklsadfj fklsdfjbarfjkdlafj

posh> 
posh> $string


fjdksalfoofjdklsafjdk fjdkslajfd fdjksalfj fjdkaslfdls

jfkldafdjlfoofkldasjf jfkdla jfklsadfj fklsdfjbarfjkdlafj

posh>

Looking to match "foo" and "bar" in a single pattern.

please, remove the meaningless prompt text from your posted code. it is both useless AND distracting. — Lee_Dailey, Feb 21 '21 at 23:05
That's just how the powershell prompt displays, not sure how to alter it @Lee_Dailey — Nicholas Saunders, Feb 21 '21 at 23:27
@NicholasSaunders, just use `PS> ` to symbolize the prompt string - anything else is noise. — mklement0, Feb 21 '21 at 23:40
for anyone on linux, you can shorten the prompt as so: https://askubuntu.com/q/1318242/847449 — Nicholas Saunders, Feb 22 '21 at 00:07
@NicholasSaunders - you use your text editor to remove prompt text ... [*grin*] — Lee_Dailey, Feb 22 '21 at 00:51
lol, @Lee_Dailey -- then I'd have to do that manually! this way, it's just always "posh" (or whatever) — Nicholas Saunders, Feb 22 '21 at 01:09
I changed the profile, so that the `pwd` isn't displayed @Lee_Dailey see https://stackoverflow.com/q/66309076/4531180 — Nicholas Saunders, Feb 22 '21 at 05:10

mklement0 · Accepted Answer · 2021-02-22T02:41:06.243

Use multiple positive lookahead assertions that each scan the entire input line (non-greedily):

'a bar foo ...' | Select-String '(?=.*?foo)(?=.*?bar)'

Note:

This approach is also available as a wrapper function around Select-String, named Select-StringAll, in this MIT-licensed Gist.
Assuming you have looked at the linked code to ensure that it is safe (which I can personally assure you of, but you should always check), you can install it directly as follows:
```
irm https://gist.github.com/mklement0/356acffc2521fdd338ef9d6daf41ef07/raw/Select-StringAll.ps1 | iex
```

With this function defined, the equivalent of the above command is:

'a bar foo ...' | Select-StringAll foo, bar

score 0 · Answer 2 · answered Feb 21 '21 at 23:41

possible solution, or approach towards a solution:

PS /home/nicholas> 
PS /home/nicholas> $pattern = '\w*(?<!foo)bar'                  
PS /home/nicholas> 
PS /home/nicholas> $string = Get-Content /home/nicholas/powershell/regex/text.txt
PS /home/nicholas> $pattern = '\w*(?<!foo)bar'                                   
PS /home/nicholas> $string | Select-String $pattern

jfkldafdjlfoofkldasjf jfkdla jfklsadfj fklsdfjbarfjkdlafj

PS /home/nicholas>

thanks to:

https://stackoverflow.com/a/9306228/4531180

How to match for "foo" and "bar" with Select-String in Powershell?

2 Answers2

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