10 lines
281 B
TypeScript
10 lines
281 B
TypeScript
export const isPangram = (text: string): boolean =>
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text
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.toLowerCase()
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.split("")
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.sort()
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.map((v) => v.charCodeAt(0))
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.filter((v) => v >= 97 && v <= 97 + 25)
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.reduce((r, v) => (r[r.length - 1] === v ? r : [...r, v]), [] as number[])
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.length === 26;
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