Transposed

Your transposed chords: ${completeTransposedChordsArr.join(\" \")}\n `);\n});\napp.get(\"/robots.txt\", async () => await serveFile(\"robots.txt\"));\n\ntype MajorChord =\n | \"C\"\n | \"C#\"\n | \"D\"\n | \"D#\"\n | \"E\"\n | \"F\"\n | \"F#\"\n | \"G\"\n | \"G#\"\n | \"A\"\n | \"A#\"\n | \"B\";\n\nconst majorChords: MajorChord[] = [\n \"C\",\n \"C#\",\n \"D\",\n \"D#\",\n \"E\",\n \"F\",\n \"F#\",\n \"G\",\n \"G#\",\n \"A\",\n \"A#\",\n \"B\",\n];\n\nfunction getMajorChords(arr: string[]): string[] {\n const majorChords = arr.map((str) => {\n if (str.includes(\"#\")) {\n return str.slice(0, 2).toUpperCase();\n } else {\n return str.slice(0, 1).toUpperCase();\n }\n });\n\n return majorChords;\n}\n\nfunction getChordTypes(arr: string[]): string[] {\n const chordTypes = arr.map((str) => {\n if (str.includes(\"#\")) {\n return str.slice(2);\n } else {\n return str.slice(1);\n }\n });\n\n return chordTypes;\n}\n\nfunction transpose(chord: MajorChord, num: number) {\n const index = majorChords.findIndex((validChord) => chord === validChord);\n let transposedIndex = index + num;\n\n if (transposedIndex > 11) {\n transposedIndex -= 12;\n } else if (transposedIndex < 0) {\n transposedIndex += 12;\n }\n\n return majorChords[transposedIndex];\n}\n\nfunction rejoinTransposedChords(\n majorChords: MajorChord[],\n chordTypes: string[],\n) {\n return (\n majorChords.map((chord: string, index: number) => {\n return chord + chordTypes[index];\n })\n );\n}\n\nexport default app.fetch;","deleted","label","chordtransposer",[99],"permalink","https://www.val.town/x/foliage/chordTransposer/code/main.ts","extension","actionData","errors"]