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reg->regexp

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This commit is contained in:
Ilya Kantor 2019-09-06 16:50:41 +03:00
parent 4232a53219
commit 32e20fc97c
35 changed files with 132 additions and 132 deletions
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8
9-regular-expressions/13-regexp-alternation/article.md
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@ -11,11 +11,11 @@ The corresponding regexp: `pattern:html|php|java(script)?`.
A usage example:
```js run
let reg = /html|php|css|java(script)?/gi;
let regexp = /html|php|css|java(script)?/gi;
let str = "First HTML appeared, then CSS, then JavaScript";
alert( str.match(reg) ); // 'HTML', 'CSS', 'JavaScript'
alert( str.match(regexp) ); // 'HTML', 'CSS', 'JavaScript'
```
We already saw a similar thing -- square brackets. They allow to choose between multiple characters, for instance `pattern:gr[ae]y` matches `match:gray` or `match:grey`.
@ -64,7 +64,7 @@ But that's wrong, the alternation should only be used in the "hours" part of the
The final solution:
```js run
let reg = /([01]\d|2[0-3]):[0-5]\d/g;
let regexp = /([01]\d|2[0-3]):[0-5]\d/g;
alert("00:00 10:10 23:59 25:99 1:2".match(reg)); // 00:00,10:10,23:59
alert("00:00 10:10 23:59 25:99 1:2".match(regexp)); // 00:00,10:10,23:59
```