jeena/en.javascript.info
1
0
Fork 0
Code Issues Pull requests Projects Packages Wiki Activity Actions

WIP

Browse source
This commit is contained in:
Ilya Kantor 2019-09-04 15:44:48 +03:00
parent ef370b6ace
commit f21cb0a2f4
71 changed files with 707 additions and 727 deletions
Download patch file Download diff file Expand all files Collapse all files

8
9-regular-expressions/14-regexp-lookahead-lookbehind/article.md
View file

@ -101,9 +101,9 @@ Lookaround types:
| Pattern | type | matches |
|--------------------|------------------|---------|
| `pattern:x(?=y)` | Positive lookahead | `x` if followed by `y` |
| `pattern:x(?!y)` | Negative lookahead | `x` if not followed by `y` |
| `pattern:(?<=y)x` | Positive lookbehind | `x` if after `y` |
| `pattern:(?<!y)x` | Negative lookbehind | `x` if not after `y` |
| `pattern:x(?=y)` | Positive lookahead | `x` if followed by `pattern:y` |
| `pattern:x(?!y)` | Negative lookahead | `x` if not followed by `pattern:y` |
| `pattern:(?<=y)x` | Positive lookbehind | `x` if after `pattern:y` |
| `pattern:(?<!y)x` | Negative lookbehind | `x` if not after `pattern:y` |
Lookahead can also used to disable backtracking. Why that may be needed and other details -- see in the next chapter.