20241128 カリー化

Transcript

1. ΧϦʔԽͬͯ஌ͬͯ·͢ʁ
2. ॳ
3. ͳͥΦϒδΣΫτࢦ޲Ͱ ࡞Δͷ͔
4. ෇࿥ͷؔ਺ܕݴޠͷ ίʔφʔ
5. ୈҰڃؔ਺ ෦෼ద༻
6. ୈҰڃؔ਺ ᵓᴷᴷ ΧϦʔԽ │ └── Ҿ਺Λ1ͭͣͭड͚औΔؔ਺ʹม׵ └── ෦෼ద༻ └── Ұ෦ͷҾ਺Λݻఆͯ͠৽͍ؔ͠਺Λ࡞੒
7. ୈҰڃؔ਺
8. ؔ਺Λม਺ͱಉ͡Α͏ʹ ࢖͑Δ
9. // ੜ੒ let calc = (x: number, y: number): number => x + y; console.log(calc(3, 4)); // ݁Ռ: 7
10. ߴ֊ؔ਺
11. Ҿ਺΍ฦΓ஋ʹؔ਺
12. // ୅ೖ calc = (x: number, y: number): number => x - y; // ड͚౉͠ const diffLength = (a: string, b: string, fn: (x: number, y: number) => number): number => { return fn(a.length, b.length); }; console.log(diffLength('aaa', 'a', calc)); // 2
13. ෦෼ద༻
14. const add = (a: number, b: number) => a + b; // ෦෼ద༻Ͱʮa = 2ʯΛݻఆ const add2 = (b: number) => add(2, b); console.log(add2(3)); // 5
15. ΧϦʔԽ
16. // ௨ৗͷؔ਺ function add(a: number, b: number): number { return a + b; } // ΧϦʔԽ͞Εͨؔ਺ const curriedAdd = (a: number) => (b: number) => a + b; console.log(curriedAdd(2)(3)); // 5 const curriedAdd2 = curryAdd(2); const result = curryAdd2(3); // 5