\uc544\ub798\uc640 \uac19\uc740 \ucf54\ub4dc\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\r\ninterface User {\r\n id: number;\r\n name: string;\r\n admin: boolean;\r\n}\r\n\r\ninterface DB {\r\n filterUsers(filter: (\/*this: User*\/) => boolean): User[];\r\n}\r\n\r\nclass UserDB implements DB {\r\n private users: User[] = [\r\n { id: 1, name: \"Alice\", admin: true },\r\n { id: 2, name: \"Bob\", admin: false },\r\n { id: 3, name: \"Charlie\", admin: true },\r\n { id: 4, name: \"David\", admin: false },\r\n ];\r\n\r\n filterUsers(filter: (\/*this: User*\/) => boolean): User[] {\r\n const result: User[] = [];\r\n\r\n for (const user of this.users) {\r\n \/\/ filter \ud568\uc218\uc758 this\ub97c \ud604\uc7ac user\ub85c \uc9c0\uc815\ud558\uc5ec \ud638\ucd9c\r\n if (filter.call(user)) {\r\n result.push(user);\r\n }\r\n }\r\n\r\n return result;\r\n }\r\n}\r\n\r\nfunction getDB(): DB {\r\n return new UserDB();\r\n}\r\n\r\n\/\/ ------------------------\r\n\/\/ \uc0ac\uc6a9 \uc608\uc81c\r\n\/\/ ------------------------\r\n\r\nconst db = getDB();\r\n\r\nconst admins = db.filterUsers(function (this: User) {\r\n return this.admin;\r\n});\r\n\r\nconsole.log(admins);\r\n<\/pre>\n\uc911\uc694\ud55c \uac83\uc740 43\ubc88\uc9f8 \uc904\uc758 \uc778\uc790\ub85c \ubc1b\uc740 \ud568\uc218\uc758 \uc778\uc790\uac00 this: User<\/code>\ub77c\ub294 \uac83\uc785\ub2c8\ub2e4. \uc778\uc790\ub85c \ubc1b\uc740 \uc774 \ud568\uc218\ub294 filter<\/code>\ub77c\ub294 \uc774\ub984\uc73c\ub85c 24\ubc88\uc9f8 \uc904\uc5d0\uc11c filter.call(user)<\/code>\ub85c \ud638\ucd9c\ub418\uace0 \uc788\uc2b5\ub2c8\ub2e4. 43\ubc88\uc9f8\uc758 \ucf54\ub4dc\ub294 Javascript\uc5d0\uc11c\ub294 \ud5c8\ub77d\ud558\uc9c0 \uc54a\ub294 \ubb38\ubc95\uc785\ub2c8\ub2e4. Type\ub97c \ud56d\uc0c1 \ud655\uc778\ud574\uc57c\ub9cc \ud558\ub294 TypeScript\uc5d0\uc11c\ub294 \uc774 this: User<\/code>\ub97c \ud1b5\ud574 \uc778\uc790\ub85c \ubc1b\ub294 \ud568\uc218 \ub0b4\ubd80\uc5d0\uc11c\uc758 this<\/code>\uc758 \ud0c0\uc785\ub3c4 \ud655\uc778\uc744 \ud574\uc57c\ud558\ubbc0\ub85c \uac1c\ubc1c\uc790\uac00 \uc9c1\uc811 this<\/code>\uc758 \ud0c0\uc785\uc744 User<\/code>\ub77c\uace0 \uba85\uc2dc \ud574\uc900 \uac83\uc785\ub2c8\ub2e4. this: User<\/code>\uac00 \uc5c6\uc744 \uacbd\uc6b0 this<\/code>\ub294 any<\/code> \ud0c0\uc785\uc73c\ub85c \ucd94\ub860\ub420 \uac83\uc774\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc774\ub807\uac8c \ub41c \uc774\uc720\ub294 filter.call(user)<\/code>\uc640 \uac19\uc740 \ud615\ud0dc\ub85c \ud638\ucd9c\ub418\uace0 \uc788\uae30 \ub54c\ubb38\uc778\ub370, \uc774\ub7ec\ud55c \ud638\ucd9c \ubc29\uc2dd\uc740 \uc624\ub798\ub41c \ubc29\uc2dd\uc785\ub2c8\ub2e4. \ud558\uc9c0\ub9cc \uc9c0\uae08\ub3c4 \ub9e4\uc6b0 \ub9ce\uc774 \uc0ac\uc6a9\ub418\uace0 \uc788\ub294 \ubc29\uc2dd\uc774\uae30\ub3c4 \ud569\ub2c8\ub2e4. \uadf8\ub7fc \uc9c0\uae08 \ubc29\uc2dd(\uc815\ud655\ud788\ub294 \uc81c\uac00 \uc8fc\uc7a5\ud558\ub294 \ubc29\uc2dd)\uc73c\ub85c \ubc14\uafbc\ub2e4\uba74 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n\r\ninterface User {\r\n id: number;\r\n name: string;\r\n admin: boolean;\r\n}\r\n\r\ninterface DB {\r\n filterUsers(filter: (user: User) => boolean): User[];\r\n}\r\n\r\nclass UserDB implements DB {\r\n private users: User[] = [\r\n { id: 1, name: \"Alice\", admin: true },\r\n { id: 2, name: \"Bob\", admin: false },\r\n { id: 3, name: \"Charlie\", admin: true },\r\n { id: 4, name: \"David\", admin: false },\r\n ];\r\n\r\n \/\/ filterUsers(filter: (this: User) => boolean): User[] {\r\n filterUsers(filter: (user: User) => boolean): User[] {\r\n const result: User[] = [];\r\n\r\n for (const user of this.users) {\r\n \/\/ filter \ud568\uc218\uc758 \uc778\uc790\uc5d0 \uc9c1\uc811 \ud604\uc7ac user\ub97c \uc9c0\uc815\ud558\uc5ec \ud638\ucd9c\r\n if (filter(user)) {\r\n result.push(user);\r\n }\r\n }\r\n\r\n return result;\r\n }\r\n}\r\n\r\nfunction getDB(): DB {\r\n return new UserDB();\r\n}\r\n\r\n\/\/ ------------------------\r\n\/\/ \uc0ac\uc6a9 \uc608\uc81c\r\n\/\/ ------------------------\r\n\r\nconst db = getDB();\r\n\r\nconst admins = db.filterUsers((user: User) => {\r\n return user.admin;\r\n});\r\n\r\nconsole.log(admins);\r\n<\/pre>\n\uba85\ud655\ud569\ub2c8\ub2e4. \uc800\ub294 \uc774 \ubc29\uc2dd\uc744 \uc120\ud638\ud558\uc9c0\ub9cc.. \ud604\uc7ac \uc81c\uacf5\ub418\ub294 \ub9e4\uc6b0 \uc720\uba85\ud55c \ub77c\uc774\ube0c\ub7ec\ub9ac\ub4e4\uc774 \uc774 \ubc29\uc2dd\uc73c\ub85c \uc81c\uacf5\ub418\uc9c0 \uc54a\uc73c\ubbc0\ub85c \uc804\uc790\uc758 \ubc29\uc2dd\ub3c4 \uc54c\uc544\ub450\uace0 \uc788\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"
\uc544\ub798\uc640 \uac19\uc740 \ucf54\ub4dc\uac00 \uc788\uc2b5\ub2c8\ub2e4. interface User { id: number; name: string; admin: boolean; } interface DB { filterUsers(filter: (\/*this: User*\/) => boolean): User[]; } class UserDB implements DB { private users: User[] = [ { id: 1, name: “Alice”, admin: true }, { id: 2, name: “Bob”, admin: false }, { id: 3, name: “Charlie”, … <\/p>\n