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6673d131fe
This commit changes our linter/formatter to biome (https://biomejs.dev/) Causing our prehook to run almost instantly, and our "yarn lint" task to run in sub 100ms. Some trade-offs: * Biome isn't quite as well established as ESLint * Are we ready to install a different vscode plugin (the biome plugin) instead of the prettier plugin The configuration set for biome also has a set of recommended rules, this is turned on by default, in order to get to something that was mergeable I have turned off a couple the rules we seemed to violate the most, that we also explicitly told eslint to ignore.
15 lines
320 B
TypeScript
15 lines
320 B
TypeScript
export const findDuplicates = <T>(arr: T[]): T[] => {
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const seen: Set<T> = new Set();
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const duplicates: Set<T> = new Set();
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for (const item of arr) {
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if (seen.has(item)) {
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duplicates.add(item);
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} else {
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seen.add(item);
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}
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}
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return [...duplicates];
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};
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