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876.Advanced search and replace -- How to remove/delete consecutive duplicate lines in a text file?

User: editor -- 2011-10-19 << 875 877 >>

Hits: 247

Type: Advanced search and replace

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Description:

How to remove/delete consecutive duplicate lines in a text file? If some adjacent lines are duplicated, only keep the first one.

Input Sample:

aaa
aaa
aaa
aaa
bbbb
bbbb
aaa
cccc
cccc

Output Sample:

aaa
bbbb
aaa
cccc

Answer:

Hint: You need to Download and install "Replace Pioneer" on windows platform to finish following steps.

1. ctrl-o open text file
2. ctrl-h open 'replace' dialog
* set 'replace unit' to 'Line'
* set 'if' to:

3. click 'replace', done.

Screenshot 1: Replace_Window

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Keywords:

delete consecutive duplicate lines adjacent lines adjacent line adjacent previous consecutive onsecutive duplicated cut duplicate lines adjacent duplicate keep first replace duplicate lines only first replace duplicate duplicate file only search text search and replace first