Contents

class Isogram {
    static alphabet = "abcdefghijklmnopqrstuvwxyz"

    static isIsogram(phrase: string): boolean {
        const appearances = new Set()

        for (const letter of phrase) {
            if (this.isLetter(letter)) {
                if (appearances.has(letter.toLowerCase())) {
                    return false
                } else {
                    appearances.add(letter.toLowerCase())
                }
            } else {
                continue
            }
        }

        return true
    }

    private static isLetter(letter: string): boolean {
        if (letter.charCodeAt(0) >= 97 && letter.charCodeAt(0) <= 122 || letter.charCodeAt(0) >= 65 && letter.charCodeAt(0) <= 90) {
            return true
        } else {
            return false
        }
    }
}

export default Isogram

Version data entries

68 entries across 68 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.179	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.178	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.177	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.176	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.175	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.174	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.173	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.172	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.171	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.170	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.169	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.167	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.166	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.165	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.164	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.163	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.162	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.161	tracks/typescript/exercises/isogram/isogram.example.ts
trackler-2.2.1.160	tracks/typescript/exercises/isogram/isogram.example.ts