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ikasoumen
June 18, 2019
Programming
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Sharing type definitions between TypeScript And Dart
ikasoumen
June 18, 2019
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Transcript
5ZQF4DSJQU%BSUؒͰ ܕΛڞ༗͢Δ 2019/6/18 Fukuoka.ts #01 ikasoumen
w JLBTPVNFO w UXJUUFS!@JLBTPVNFO w QJYJWJLB@TPVNFO w HJUIVCJLBTPVNFO w ϐΫγϒԬΦϑΟε
w 5ZQF4DSJQU"OHVMBS͔Β w ࠷ۙ3FBDUͰԿͰ54Ͱॻ͘ w ΠϥετອըΛඳ͘ͷ͖ ࣗݾհ 2
ຊ
w ؒͷࣾһݚमͰ͏ΞϓϦΛ࡞Δ͜ͱʹͳͬͨ w ࣾͷΞυϨεͰ֤ࣾһ͕(PPHMFϩάΠϯͰ͖ͯ w ࣸਅ͕ߘͰ͖ͯ w ʮ͍͍ͶʂʯͰ͖Δ w ࡞ͬͨํ͕໘ന͍ͷͰ࡞Δ
w ࢼͯ͠Έ͍ٕͨज़Γ͜͏ͥʔʂ w 'MVUUFS $MPVE'JSFTUPSF γφϦΦ 4
w (PPHMFͷ/P42-%# w (00% w ΦϑϥΠϯ࣌ͰSFBEXSJUFͰ͖Δ w ߋ৽͞ΕͨσʔλΛͪ͜Β͔ΒऔΓʹߦ͘ඞཁ͕ͳ͍ w هड़͖࣮͕͍ͩ͢ͿݮΔ
w #"% w %#ʹεΩʔϚ͕ͳ͍ w σʔλͷݕࡧෳυΩϡϝϯτͷҰׅஔʹऑ͍ 'JSFTUPSF 5
͏·͍ो͚ͩٵ͍͍ͨ
ϦΞϧλΠϜߋ৽͚ͩ ඒຯ͍͖͍ͨͩͨ͘͠
εΩʔϚΛ༻ҙ͠·͠ΐ͏
None
w +40/ͷܕΛجʹଞݴޠͷܕͱͯ͠ग़ྗ w TPVSDF+40/ +40/4DIFNB 5ZQF4DSJQU w UBSHFU͍Ζ͍Ζ RVJDLUZQF 10
npx quicktype ./ts/models.ts -o ./dart/models.dart DPNNBOE
export type UserDoc = { name: string, role: Roles, /**
* @TJS-type integer */ createdAt: number, } export enum Roles { guest = "guest", member = "member", admin = "admin", } JOQVU5ZQF4DSJQU
class UserDoc { int createdAt; String name; Roles role; UserDoc({
this.createdAt, this.name, this.role, }); factory UserDoc.fromJson(Map<String, dynamic> json) => new UserDoc( createdAt: json["createdAt"], name: json["name"], role: rolesValues.map[json["role"]], ); Map<String, dynamic> toJson() => { "createdAt": createdAt, "name": name, "role": rolesValues.reverse[role], }; } PVUQVU%BSU
enum Roles { ADMIN, GUEST, MEMBER } final rolesValues =
new EnumValues({ "admin": Roles.ADMIN, "guest": Roles.GUEST, "member": Roles.MEMBER }); class EnumValues<T> { Map<String, T> map; Map<T, String> reverseMap; EnumValues(this.map); Map<T, String> get reverse { if (reverseMap == null) { reverseMap = map.map((k, v) => new MapEntry(v, k)); } return reverseMap; } } PVUQVU%BSU
w 'JSFTUPSF+40/֦ுͳσʔλΛอ࣋Ͱ͖Δ w 5ZQF4DSJQUΛTPVSDFʹͰ͖Δ w +40/4DIFNBهड़ྔ͕ଟ͍ˍ׳Ε͍ͯͳ͍ w ։ൃɾຊ൪σʔλͷೖεΫϦϓτΛ5ZQF4DSJQUͰॻ͖ ͍ͨ w
ಉ͡ܕσʔλ͔Βੜ·Ε࣮ͨͳͷͰɺ%#ʹೖͨ͠ σʔλͱΫϥΠΞϯτͷ࣮ͷࠩҟ͕ͳ͘ͳΔ બఆཧ༝ 15
w %#ͷσʔλͷܕ͕߹ͬͯͳ͍Τϥʔͷ໓ w ෆ׳Εͳٕज़ελοΫͰʮΤϥʔͷՄೳੑ͕͋ΔՕॴʯΛ ݮΒͤͨͷେ͖͍ w ෆਖ਼ͳσʔλͷ͍ͤͰϋϚΔͱർฐ͢Δ w ࠓ͍ΔϒϥϯνͷεΩʔϚΛҰൃͰ֬ೝͰ͖Δ w
͓͔͛ͰΞϓϦແࣄϦϦʔε͞ΕݚमΓ্͕Γ·͠ ͨͱ͞ ಋೖՌ 16
w 'JSFTUPSFʹεΩʔϚΛ༻ҙ͢Δ͜ͱʹΑͬͯ νʔϜʹͱͬͯ։ൃΛਐΊ͍͢ঢ়ଶʹͨ͠ w 5ZQF4DSJQUϓϩδΣΫτʹΈࠐΈ͍͢ w ๛ͳOQNύοέʔδࢿݯ w σʔλೖͱ͔ूܭͱ͔ w
ผݴޠͷܕͷࣗಈੜ·ͰͰ͖ͪΌ͏ ·ͱΊ 17