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java.lang.Enum\n```typescript\nimport {Enum, EnumType} from \"ts-jenum\";\n\n@Enum(\"text\")\nexport class State extends EnumType\u003cState\u003e() {\n\n    static readonly NEW = new State(1, \"New\");\n    static readonly ACTIVE = new State(2, \"Active\");\n    static readonly BLOCKED = new State(3, \"Blocked\");\n\n    private constructor(readonly code: number, readonly text: string) {\n        super();\n    }\n}\n\n// Usage example\nconsole.log(\"\" + State.ACTIVE);        // \"Active\"\nconsole.log(\"\" + State.BLOCKED);       // \"Blocked\"\nconsole.log(State.values());           // [State.NEW, State.ACTIVE, State.BLOCKED]\nconsole.log(State.valueOf(\"New\"));     // State.NEW\nState.valueOf(\"Unknown\")               // throw Error(...)\nconsole.log(State.valueByName(\"NEW\")); // State.NEW\nconsole.log(State.ACTIVE.enumName);    // ACTIVE\n\nconst first = state =\u003e state.code === 1;\nconsole.log(State.find(\"New\"));        // State.NEW\nconsole.log(State.find(first));        // State.NEW\nconsole.log(State.find(\"Unknown\"));    // null\nconst last = state =\u003e state.code === 3;\nconsole.log(State.filter(last))        // [State.BLOCKED]\nconsole.log(State.keys())              // [\"NEW\", \"ACTIVE\", \"BLOCKED\"]\n\n// be \"NEW\" | \"ACTIVE\" | \"BLOCKED\"\ntype StateNameUnion = EnumConstNames\u003ctypeof State\u003e;\n\n```\n## EnumTools powerful tool to comfortable work with plain json struct like enum\n```typescript\nimport {EnumTools} from \"ts-jenum\";\n// plain json like enum\nconst Colors = {\n    WHITE: \"#FFFFFF\",\n    GRAY: \"#808080\",\n    BLACK: \"#000000\"\n};\n\n// to be [\"WHITE\", \"GRAY\", \"BLACK\"]\nconst keys = EnumTools.keys(Colors);\n\n// to be [\"#FFFFFF\", \"#808080\", \"#000000\"]\nconst values = EnumTools.values(Colors);\n\n/**\n * to be {\n *    \"#FFFFFF\": \"WHITE\",\n *    \"#808080\": \"GRAY\",\n *    \"#000000\": \"BLACK\"\n * };\n */\nconst rStruct = EnumTools.reverse(Colors);\n\n/**\n * to be: [\n *  {key: \"WHITE\", value: \"#FFFFFF\"},\n *  {key: \"GRAY\", value: \"#808080\"},\n *  {key: \"BLACK\", value: \"#000000\"}\n * ]\n */\nconst pairs = EnumTools.pairs(Colors);\n\n/**\n * To be class like:\n * @Enum\u003cColorEnum\u003e(\"key\")\n * class ColorEnum extends EnumType\u003cColorEnum\u003e() {\n *    static readonly WHITE = new ColorEnum(\"WHITE\", \"#FFFFFF\");\n *    static readonly GRAY = new ColorEnum(\"GRAY\", \"#808080\");\n *    static readonly BLACK = new ColorEnum(\"BLACK\", \"#000000\");\n *    private constructor(readonly key: string, readonly value: string | number) {\n *        super();\n *    }\n * }\n * ColorEnum has all IDE hint for developer, type checking and type safety\n */\nconst ColorEnum = EnumTools.toClass(Colors);\n\n```\n\nDetails. Type safety.\nIn example above, you can write \"tExt\" or \"txt\" instead of \"text\" as @Enum decorator argument and no exception happen. In example below this problem is absent. Add an expression \u0026lt;State\u0026gt; to @Enum decorator\n\n```typescript\nimport {Enum, EnumConstNames, EnumType} from \"ts-jenum\";\n\n@Enum\u003cState\u003e(\"text\")\nexport class State extends EnumType\u003cState\u003e() {\n\n    static readonly NEW = new State(1, \"New\");\n    static readonly ACTIVE = new State(2, \"Active\");\n    static readonly BLOCKED = new State(3, \"Blocked\");\n\n    private constructor(readonly code: number, readonly text: string) {\n        super();\n    }\n}\n// Get Enum Names\n// be \"NEW\" | \"ACTIVE\" | \"BLOCKED\"\ntype StateNameUnion = EnumConstNames\u003ctypeof State\u003e;\n```\n\nPowerful typing.\n\n```typescript\n@Enum\u003cPerson\u003e(\"id\")\nclass Person\u003cIdType extends 1 | 2 = 1 | 2, \n             NameType extends \"Ivan\" | \"John\" = \"Ivan\" | \"John\"\n            \u003e extends EnumType\u003cPerson\u003e() {\n\n    static readonly IVAN = new Person(1 as const, \"Ivan\" as const);\n    static readonly JOHN = new Person(2 as const, \"John\" as const);\n\n    private constructor(readonly id: IdType, readonly name: NameType) {\n        super();\n    }\n\n    static doSomeWork(): void {\n        // type to be: \"Ivan\". Not string!\n        const name = Person.IVAN.name;\n        // to be: error\n        // if (name === \"cat\") \n        //     ^ This condition will always return 'false' since the types '\"Ivan\"' and '\"cat\"' have no overlap.\n\n        // type to be: 1. Not number!\n        const id = Person.IVAN.id;\n        // to be: error\n        // if (id === 3) \n        //     ^ This condition will always return 'false' since the types '1' and '3' have no overlap\n    }\n}\n```","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Freforms%2Fts-jenum","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Freforms%2Fts-jenum","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Freforms%2Fts-jenum/lists"}