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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,24 @@ | ||
import { onlyUnique, onlyUniqueFiles } from './utils'; | ||
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describe('only unique', () => { | ||
it('should filter out duplicates', () => { | ||
const arr = [1, 2, 3, 4, 3]; | ||
const res = arr.filter(onlyUnique); | ||
expect(res).toEqual([1, 2, 3, 4]); | ||
}); | ||
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it('should filter out duplicated files', () => { | ||
const res = ['foo/bar', 'bar/foo', 'foo/bar'].filter(onlyUniqueFiles); | ||
expect(res).toEqual(['foo/bar', 'bar/foo']); | ||
}); | ||
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it('should filter out child directories from front', () => { | ||
const res = ['foo/bar/3', 'bar/foo', 'foo/bar'].filter(onlyUniqueFiles); | ||
expect(res).toEqual(['bar/foo', 'foo/bar']); | ||
}); | ||
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it('should filter out child directories from back', () => { | ||
const res = ['foo', 'bar/foo', 'foo/bar'].filter(onlyUniqueFiles); | ||
expect(res).toEqual(['foo', 'bar/foo']); | ||
}); | ||
}); |
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Original file line number | Diff line number | Diff line change |
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@@ -1,3 +1,33 @@ | ||
import { sep } from 'path'; | ||
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export function onlyUnique<T>(value: T, index: number, self: Array<T>) { | ||
return self.indexOf(value) === index; | ||
} | ||
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export function onlyUniqueFiles(value: string, index: number, self: Array<string>) { | ||
const valueDir = value + sep; | ||
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for (let i = 0; i < index; i++) { | ||
const other = self[i]; | ||
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if (other === value) { | ||
return false; | ||
} | ||
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const otherDir = other + sep; | ||
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if (value.startsWith(otherDir)) { | ||
return false; | ||
} | ||
} | ||
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for (let i = index + 1; i < self.length; i++) { | ||
const other = self[i]; | ||
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if (other !== value && valueDir.startsWith(other)) { | ||
return false; | ||
} | ||
} | ||
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return true; | ||
} |