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

fixes

Browse source
This commit is contained in:
Ilya Kantor 2019-06-26 09:30:35 +03:00
parent 4f2a90854d
commit 1191dbb395
2 changed files with 34 additions and 31 deletions
Download patch file Download diff file Expand all files Collapse all files

4
9-regular-expressions/07-regexp-quantifiers/article.md
View file

@ -111,7 +111,7 @@ Regexp "open HTML-tag without attributes", like `<span>` or `<p>`: `pattern:/<[a
alert( "<body> ... </body>".match(/<[a-z]+>/gi) ); // <body>
```
We look for character `pattern:'<'` followed by one or more English letters, and then `pattern:'>'`.
We look for character `pattern:'<'` followed by one or more Latin letters, and then `pattern:'>'`.
Regexp "open HTML-tag without attributes" (improved): `pattern:/<[a-z][a-z0-9]*>/i`
: Better regexp: according to the standard, HTML tag name may have a digit at any position except the first one, like `<h1>`.
@ -132,7 +132,7 @@ We can see one common rule in these examples: the more precise is the regular ex
For instance, for HTML tags we could use a simpler regexp: `pattern:<\w+>`.
...But because `pattern:\w` means any English letter or a digit or `'_'`, the regexp also matches non-tags, for instance `match:<_>`. So it's much simpler than `pattern:<[a-z][a-z0-9]*>`, but less reliable.
...But because `pattern:\w` means any Latin letter or a digit or `'_'`, the regexp also matches non-tags, for instance `match:<_>`. So it's much simpler than `pattern:<[a-z][a-z0-9]*>`, but less reliable.
Are we ok with `pattern:<\w+>` or we need `pattern:<[a-z][a-z0-9]*>`?