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README: add notes in --ignore-extras

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Paul Campbell 2022-01-15 14:44:21 +00:00
parent c3188ae353
commit 9d97a50e6e
1 changed files with 46 additions and 1 deletions
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README.md
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@ -42,6 +42,8 @@ line 4
### Skip until a number of matching lines ### Skip until a number of matching lines
The whole line must match.
This example reads the named file. This example reads the named file.
File: `input.txt` File: `input.txt`
@ -67,7 +69,9 @@ gamma
alpha alpha
``` ```
### Skip lines until a number of tokens as seen ### Skip lines until a number of tokens are seen
Looks for a string within a line, counting each occurance.
This example reads the file from stdin. This example reads the file from stdin.
@ -99,3 +103,44 @@ commodo consequat.
It matches the first `dolor` on line 1, It matches the first `dolor` on line 1,
and the second on line 4 as part of the word `dolore`. and the second on line 4 as part of the word `dolore`.
### Skip lines until a lines with tokens are seen
Looks for a string within a line, only counting each matching line once.
This example reads the file from stdin.
File: `input.txt`
```text
Lorem ipsum dolor sit amet,
consectetur adipiscing elit,
sed do eiusmod tempor incididunt
ut labore et dolore magna aliqua.
Ut enim ad minim veniam,
quis nostrud exercitation ullamco
laboris nisi ut aliquip ex ea
commodo consequat.
```
```bash
cat input.txt | skip 4 --token m --ignore-extras
```
Will output:
```text
quis nostrud exercitation ullamco
laboris nisi ut aliquip ex ea
commodo consequat.
```
Without `--ignore-extras`, it would have found the fourth `m` on line 3, and displayed:
```text
ut labore et dolore magna aliqua.
Ut enim ad minim veniam,
quis nostrud exercitation ullamco
laboris nisi ut aliquip ex ea
commodo consequat.
```