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Diffstat (limited to 'Lookahead.md')
| -rw-r--r-- | Lookahead.md | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Lookahead.md b/Lookahead.md new file mode 100644 index 0000000..5405b91 --- /dev/null +++ b/Lookahead.md @@ -0,0 +1,11 @@ +v the match any statements are like: match `hallo`, `hallobob`, `hallobier` + +Negative lookahead: `hallo(?!blaat)`: match any hallo but not in halloblaat +Positive lookahead: `hallo(?=blaat)`: only match hallo in halloblaat + +--- + +Negative lookbehind: `(?<!hallo)blaat` : match any blaat except in halloblaat +Positive lookbehind: `(?<=hallo)blaat` : only match blaat in halloblaat +> Look behind has limited browser compatibility + |