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minor fixes

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This commit is contained in:
Ilya Kantor 2021-11-01 20:57:19 +03:00
parent 6989312841
commit cc18823108
1 changed files with 4 additions and 4 deletions
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8
9-regular-expressions/13-regexp-alternation/02-find-matching-bbtags/solution.md
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@ -1,14 +1,14 @@
Opening tag is `pattern:\[(b|url|quote)\]`. Opening tag is `pattern:\[(b|url|quote)]`.
Then to find everything till the closing tag -- let's use the pattern `pattern:.*?` with flag `pattern:s` to match any character including the newline and then add a backreference to the closing tag. Then to find everything till the closing tag -- let's use the pattern `pattern:.*?` with flag `pattern:s` to match any character including the newline and then add a backreference to the closing tag.
The full pattern: `pattern:\[(b|url|quote)\].*?\[/\1\]`. The full pattern: `pattern:\[(b|url|quote)\].*?\[/\1]`.
In action: In action:
```js run ```js run
let regexp = /\[(b|url|quote)\].*?\[\/\1\]/gs; let regexp = /\[(b|url|quote)].*?\[\/\1]/gs;
let str = ` let str = `
[b]hello![/b] [b]hello![/b]
@ -20,4 +20,4 @@ let str = `
alert( str.match(regexp) ); // [b]hello![/b],[quote][url]http://google.com[/url][/quote] alert( str.match(regexp) ); // [b]hello![/b],[quote][url]http://google.com[/url][/quote]
``` ```
Please note that besides escaping `pattern:[` and `pattern:]`, we had to escape a slash for the closing tag `pattern:[\/\1]`, because normally the slash closes the pattern. Please note that besides escaping `pattern:[`, we had to escape a slash for the closing tag `pattern:[\/\1]`, because normally the slash closes the pattern.