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Tran Hau 2020-05-01 20:40:49 +07:00
parent 61be98239a
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Brain/regex.md
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@ -5,11 +5,11 @@ Read [Syntax](https://github.com/google/re2/wiki/Syntax).
Read [Golang-Regex-Tutorial](https://github.com/StefanSchroeder/Golang-Regex-Tutorial). Read [Golang-Regex-Tutorial](https://github.com/StefanSchroeder/Golang-Regex-Tutorial).
| regex | meaning | | regex | meaning |
| ------- | ----------------------------------------- | | -------- | ----------------------------------------- |
| `.` | any character, default not including `\n` | | `.` | any character, default not including `\n` |
| `[xy]` | `x` or `y` character | | `[xy]` | `x` or `y` character |
| `[^xy]` | not `x` and `y` character | | `[^xy]` | not `x` and `y` character |
| \| | `x` or `y` | | `x`\|`y` | `x` or `y` |
| `x*` | 0 or more `x`, prefer **more** | | `x*` | 0 or more `x`, prefer **more** |
| `x+` | 1 or more `x`, prefer **more** | | `x+` | 1 or more `x`, prefer **more** |
| `x?` | 0 or 1 `x` , prefer 1 | | `x?` | 0 or 1 `x` , prefer 1 |
@ -26,7 +26,7 @@ Read [Golang-Regex-Tutorial](https://github.com/StefanSchroeder/Golang-Regex-Tut
| -------------- | ----------------------------------- | | -------------- | ----------------------------------- |
| `(foo)` | numbered capturing group (submatch) | | `(foo)` | numbered capturing group (submatch) |
| `(?:foo)` | non capturing group | | `(?:foo)` | non capturing group |
| `(?:x|y)` | `x` or `y` expression wrap in `()` | | `(?:x`\|`y)` | `x` or `y` expression wrap in `()` |
| `(?flags)` | set flags within current group | | `(?flags)` | set flags within current group |
| flag | meaning | | flag | meaning |