TIL: Using global command

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Asocia 2021-08-29 14:11:54 +03:00
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commit 6de0fb8da6

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The global command `:g[lobal]` is very powerful. It is used to execute a command matching a pattern. The syntax is
```
:[range]g/pattern/cmd
```
The default range is whole file. If you want to change the range here is a reference table for substitution.
| Range | Description | Example |
| ------ | --------------------------------------| --------------------|
| 28 | line 28 | :28s/bad/good/g |
| 1 | first line | :1s/bad/good/g |
| $ | last line | :$s/bad/good/g |
| % | all lines in a file (same as 1,$) | :%s/bad/good/g |
| 6,28 | lines 6 to 28 inclusive | :6,28s/bad/good/g |
| 11,$ | lines 11 to end of the file | :11,$s/bad/good/g |
| .,$ | current line to end of the file | :.,$s/bad/good/g |
| .+1,$ | line after current line to end | :.+1,$s/bad/good/g |
| .,+4 | current to current+5 line, inclusive) | :.,.+4s/bad/good/g |
| ?a?,/b | between patterns a and b, inclusive) | :?a?,/b/s/bad/good |
Example global commands:
- `:g/error/d` - delete all lines containing string `error`
- `g!/important/d` - delete all lines **not** containing string `important`
- `4,10t15` - copy all lines between 4 and 10 **t**o line 15
- `4,10m15` - **m**ove all lines between 4 and 10 **t**o line 15
- `:5,18g/^foo/normal 0df=` - run normal command `0df=` on the lines between 5 and 18 which starts with string `foo`