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I need to delete every line that contains less than 4 words or more than 10.
What can I do?

Can you provide some more information on the sort of text you want to search? Is this structured data or English prose? Is it punctuated in some way?

If this is prose rather than data then words can be separated by spaces, commas, semi colon, question marks etc.

Please post an example.

Use "Posix" regular expression syntax:

Configure | Preferences | Editor

[X] Use POSIX regular expression syntax

Remove lines that contain fewer than 4 words:

Find what: ^(\<[a-z0-9_']+\>[^a-z0-9_']*){1,3}\n
Replace with: [nothing]

[X] Regular expression

Replace All

Remove lines that contain more than 10 words:

Find what: ^(\<[a-z0-9_']+\>[^a-z0-9_']*){11,}\n
Replace with: [nothing]

[X] Regular expression

Replace All

These are more accurate:

Remove lines that contain fewer than 4 words:

Find what: ^[^a-z0-9_']*([a-z0-9_']+[^a-z0-9_']+){0,2}[a-z0-9_']+[^a-z0-9_']*\n
Replace with: [nothing]

[X] Regular expression

Replace All

Remove lines that contain more than 10 words:

Find what: ^[^a-z0-9_']*([a-z0-9_']+[^a-z0-9_']+){10,}[a-z0-9_']+[^a-z0-9_']*\n
Replace with: [nothing]

[X] Regular expression

Replace All

Great thanks!

Thanks i follow your instruction and work well....
Have file like this:

mybuyeremail@email.com:mybuyeraddress
mybuyeremail3@email.com:
mybuyeremail4@email.com:
mybuyeremail1@email.com:mybuyeraddress1


how to delete all line donot contain mybuyeraddress....

TQ

Search | Find... (<F5>):

Find what: mybuyeraddress

Mark All

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