From 27514d58573ce1f844af4ea60afa72c7f58f1cd7 Mon Sep 17 00:00:00 2001
From: Jasper Ras <jras@hostnet.nl>
Date: Thu, 21 Aug 2025 22:09:29 +0200
Subject: vault backup: 2025-08-21 22:09:29

---
 Lookahead.md | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 Lookahead.md

(limited to 'Lookahead.md')

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
+
-- 
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