Use Regexp.exec instead of replace for side-effects
#13
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steven-tey
reviewed
Aug 1, 2022
| // actually matched, so that we can extract the appropriate keyword. | ||
| combineText(post).replace(termsRegex, (_, ...terms: string[]) => { | ||
| let match; | ||
| while ((match = termsRegex.exec(combined))) { |
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is this an equals sign = or an equality == comparison?
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Equals. In this situation, the extra parens are meant to indicate that this is an intentional assignment. See https://eslint.org/docs/latest/rules/no-cond-assign
| @@ -47,22 +47,22 @@ export function postScanner(teamsAndKeywords: TeamAndKeywords) { | |||
| const text = combineText(post); // combine text from post's title, text, and url | |||
| const teamsInterestedInThisPost = new Set() as Set<string>; // set of team IDs that are interested in this post | |||
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| text.replace(scanner, (_, ...terms) => { | |||
| let match; | |||
| while ((match = scanner.exec(text))) { | |||
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Should this be an equality == comparison?
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No, scanner.exec(text) checks null. So == is not needed.
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Could we add a description so it's clear what this PR solves? 🙏 |
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This replaces the
String.p.replaceuses that are only used for side-effects with a fasterRegExp.p.execloop. This avoids the string allocation of the output string, and makes it a little more clear the loop is used for side-effects.