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Ilya Kantor 2019-04-25 21:45:31 +02:00
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9-regular-expressions/02-regexp-methods/article.md
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@ -263,7 +263,7 @@ Quite often we'd like to reuse parts of the source string, recombine them in the
To do so, we should: To do so, we should:
1. First, mark the parts by parentheses in regexp. 1. First, mark the parts by parentheses in regexp.
2. Use `$1`, `$2` (and so on) in the replacement string to get the content matched by parentheses. 2. Use `$1`, `$2` (and so on) in the replacement string to get the content matched by 1st, 2nd and so on parentheses.
For instance: For instance:
@ -433,7 +433,7 @@ alert( regexp.test(str) ); // false (no match)
````warn header="Same global regexp tested repeatedly may fail to match" ````warn header="Same global regexp tested repeatedly may fail to match"
If we apply the same global regexp to different inputs, it may lead to wrong result, because `regexp.test` call advances `regexp.lastIndex` property, so next matches start from non-zero position. If we apply the same global regexp to different inputs, it may lead to wrong result, because `regexp.test` call advances `regexp.lastIndex` property, so the search in another string may start from non-zero position.
For instance, here we call `regexp.test` twice on the same text, and the second time fails: For instance, here we call `regexp.test` twice on the same text, and the second time fails: