{
  "id": "@typed/fx#RefSubject.filterMap",
  "canonicalId": "@typed/fx/RefSubject#filterMap",
  "symbol": {
    "id": "@typed/fx#RefSubject.filterMap",
    "packageName": "@typed/fx",
    "moduleName": ".",
    "exportName": "RefSubject.filterMap",
    "kind": "constant",
    "signatures": [
      "export declare const filterMap: {\n    <A, B>(f: (a: A) => Option.Option<B>): {\n        <E, R>(ref: RefSubject<A, E, R> | Computed<A, E, R> | Filtered<A, E, R>): Filtered<B, E, R>;\n        <R0, E0, B, E, R, E2, R2>(versioned: Versioned.Versioned<R0, E0, A, E, R, A, E2, R2>, f: (a: A) => Option.Option<B>): Filtered<B, E0 | E | E2, R0 | R2>;\n    };\n    <R0, E0, A, E, R, B, E2, R2>(versioned: Versioned.Versioned<R0, E0, A, E, R, A, E2, R2>, f: (a: A) => Option.Option<B>): Filtered<B, E0 | E | E2, R0 | R2 | Exclude<R, Scope.Scope>>;\n    <A, E, R, B>(ref: RefSubject<A, E, R> | Computed<A, E, R> | Filtered<A, E, R>, f: (a: A) => Option.Option<B>): Filtered<B, E, R>;\n};"
    ],
    "summary": "Filters and transforms a `RefSubject`, `Computed`, or `Filtered` using a pure function that returns an `Option`.",
    "sections": {
      "Why": "Filters and transforms a `RefSubject`, `Computed`, or `Filtered` using a pure function that\nreturns an `Option`. Current reads and pushed versions use the same derivation, preventing\nsnapshot and subscription behavior from diverging.",
      "Ownership and lifetime": "The filter map view retains no independent value. Its Effect read fails with NoSuchElement\nwhile absent; the observing Scope owns and finalizes its Fx subscription."
    },
    "examples": [
      {
        "language": "ts",
        "code": "import { Effect, Option } from \"effect\"\nimport * as RefSubject from \"@typed/fx/RefSubject\"\n\nconst program = Effect.gen(function* () {\n  const numbers = yield* RefSubject.make([1, 2, 3, 4, 5])\n\n  // Get the first even number\n  const firstEven = RefSubject.filterMap(numbers, (arr) =>\n    Option.fromNullable(arr.find((n) => n % 2 === 0))\n  )\n\n  const value = yield* firstEven\n  console.log(value) // 2\n})"
      }
    ],
    "relations": [],
    "source": {
      "file": "packages/fx/src/RefSubject/RefSubject.ts",
      "line": 3229
    },
    "since": "1.0.0",
    "category": "Optional queries"
  },
  "exposure": {
    "recordKind": "declaration",
    "id": "@typed/fx#RefSubject.filterMap",
    "packageName": "@typed/fx",
    "packageVersion": "2.0.0-beta.13",
    "moduleName": ".",
    "consumerSpecifier": "@typed/fx",
    "exportName": "RefSubject",
    "qualifiedName": "RefSubject.filterMap",
    "declarationKey": "declaration:be020f157d6a974ee46d8d7c",
    "family": "variable",
    "signatures": [
      "export declare const filterMap: {\n    <A, B>(f: (a: A) => Option.Option<B>): {\n        <E, R>(ref: RefSubject<A, E, R> | Computed<A, E, R> | Filtered<A, E, R>): Filtered<B, E, R>;\n        <R0, E0, B, E, R, E2, R2>(versioned: Versioned.Versioned<R0, E0, A, E, R, A, E2, R2>, f: (a: A) => Option.Option<B>): Filtered<B, E0 | E | E2, R0 | R2>;\n    };\n    <R0, E0, A, E, R, B, E2, R2>(versioned: Versioned.Versioned<R0, E0, A, E, R, A, E2, R2>, f: (a: A) => Option.Option<B>): Filtered<B, E0 | E | E2, R0 | R2 | Exclude<R, Scope.Scope>>;\n    <A, E, R, B>(ref: RefSubject<A, E, R> | Computed<A, E, R> | Filtered<A, E, R>, f: (a: A) => Option.Option<B>): Filtered<B, E, R>;\n};"
    ],
    "sourceSpans": [
      {
        "file": "packages/fx/src/RefSubject/RefSubject.ts",
        "start": {
          "line": 3229,
          "column": 14
        },
        "end": {
          "line": 3264,
          "column": 3
        }
      },
      {
        "file": "packages/fx/src/RefSubject/RefSubject.ts",
        "start": {
          "line": 3230,
          "column": 3
        },
        "end": {
          "line": 3238,
          "column": 5
        }
      },
      {
        "file": "packages/fx/src/RefSubject/RefSubject.ts",
        "start": {
          "line": 3240,
          "column": 3
        },
        "end": {
          "line": 3243,
          "column": 66
        }
      },
      {
        "file": "packages/fx/src/RefSubject/RefSubject.ts",
        "start": {
          "line": 3245,
          "column": 3
        },
        "end": {
          "line": 3248,
          "column": 24
        }
      }
    ],
    "aliases": [
      "@typed/fx/RefSubject#filterMap"
    ],
    "isAlias": true,
    "parentId": "@typed/fx#RefSubject",
    "static": false,
    "importedFrom": "declaration:be020f157d6a974ee46d8d7c"
  },
  "declaration": {
    "declarationKey": "declaration:be020f157d6a974ee46d8d7c",
    "name": "filterMap",
    "family": "variable",
    "facets": [
      {
        "family": "variable",
        "syntaxKind": "VariableDeclaration",
        "signatures": [
          "export declare const filterMap: {\n    <A, B>(f: (a: A) => Option.Option<B>): {\n        <E, R>(ref: RefSubject<A, E, R> | Computed<A, E, R> | Filtered<A, E, R>): Filtered<B, E, R>;\n        <R0, E0, B, E, R, E2, R2>(versioned: Versioned.Versioned<R0, E0, A, E, R, A, E2, R2>, f: (a: A) => Option.Option<B>): Filtered<B, E0 | E | E2, R0 | R2>;\n    };\n    <R0, E0, A, E, R, B, E2, R2>(versioned: Versioned.Versioned<R0, E0, A, E, R, A, E2, R2>, f: (a: A) => Option.Option<B>): Filtered<B, E0 | E | E2, R0 | R2 | Exclude<R, Scope.Scope>>;\n    <A, E, R, B>(ref: RefSubject<A, E, R> | Computed<A, E, R> | Filtered<A, E, R>, f: (a: A) => Option.Option<B>): Filtered<B, E, R>;\n};"
        ],
        "typeParameters": [],
        "sourceSpans": [
          {
            "file": "packages/fx/src/RefSubject/RefSubject.ts",
            "start": {
              "line": 3229,
              "column": 14
            },
            "end": {
              "line": 3264,
              "column": 3
            }
          }
        ],
        "static": false,
        "readonly": false,
        "optional": false
      },
      {
        "family": "call-signature",
        "syntaxKind": "CallSignature",
        "signatures": [
          "<A, B>(f: (a: A) => Option.Option<B>): {\n    <E, R>(ref: RefSubject<A, E, R> | Computed<A, E, R> | Filtered<A, E, R>): Filtered<B, E, R>;\n    <R0, E0, B, E, R, E2, R2>(versioned: Versioned.Versioned<R0, E0, A, E, R, A, E2, R2>, f: (a: A) => Option.Option<B>): Filtered<B, E0 | E | E2, R0 | R2>;\n};",
          "<R0, E0, A, E, R, B, E2, R2>(versioned: Versioned.Versioned<R0, E0, A, E, R, A, E2, R2>, f: (a: A) => Option.Option<B>): Filtered<B, E0 | E | E2, R0 | R2 | Exclude<R, Scope.Scope>>;",
          "<A, E, R, B>(ref: RefSubject<A, E, R> | Computed<A, E, R> | Filtered<A, E, R>, f: (a: A) => Option.Option<B>): Filtered<B, E, R>;"
        ],
        "typeParameters": [
          "A",
          "B",
          "R0",
          "E0",
          "E",
          "R",
          "E2",
          "R2"
        ],
        "sourceSpans": [
          {
            "file": "packages/fx/src/RefSubject/RefSubject.ts",
            "start": {
              "line": 3230,
              "column": 3
            },
            "end": {
              "line": 3238,
              "column": 5
            }
          },
          {
            "file": "packages/fx/src/RefSubject/RefSubject.ts",
            "start": {
              "line": 3240,
              "column": 3
            },
            "end": {
              "line": 3243,
              "column": 66
            }
          },
          {
            "file": "packages/fx/src/RefSubject/RefSubject.ts",
            "start": {
              "line": 3245,
              "column": 3
            },
            "end": {
              "line": 3248,
              "column": 24
            }
          }
        ],
        "static": false,
        "readonly": false,
        "optional": false
      }
    ],
    "signatures": [
      "export declare const filterMap: {\n    <A, B>(f: (a: A) => Option.Option<B>): {\n        <E, R>(ref: RefSubject<A, E, R> | Computed<A, E, R> | Filtered<A, E, R>): Filtered<B, E, R>;\n        <R0, E0, B, E, R, E2, R2>(versioned: Versioned.Versioned<R0, E0, A, E, R, A, E2, R2>, f: (a: A) => Option.Option<B>): Filtered<B, E0 | E | E2, R0 | R2>;\n    };\n    <R0, E0, A, E, R, B, E2, R2>(versioned: Versioned.Versioned<R0, E0, A, E, R, A, E2, R2>, f: (a: A) => Option.Option<B>): Filtered<B, E0 | E | E2, R0 | R2 | Exclude<R, Scope.Scope>>;\n    <A, E, R, B>(ref: RefSubject<A, E, R> | Computed<A, E, R> | Filtered<A, E, R>, f: (a: A) => Option.Option<B>): Filtered<B, E, R>;\n};"
    ],
    "typeParameters": [
      "A",
      "B",
      "R0",
      "E0",
      "E",
      "R",
      "E2",
      "R2"
    ],
    "summary": "Filters and transforms a `RefSubject`, `Computed`, or `Filtered` using a pure function that returns an `Option`.",
    "sections": {
      "Why": "Filters and transforms a `RefSubject`, `Computed`, or `Filtered` using a pure function that\nreturns an `Option`. Current reads and pushed versions use the same derivation, preventing\nsnapshot and subscription behavior from diverging.",
      "Ownership and lifetime": "The filter map view retains no independent value. Its Effect read fails with NoSuchElement\nwhile absent; the observing Scope owns and finalizes its Fx subscription."
    },
    "examples": [
      {
        "language": "ts",
        "code": "import { Effect, Option } from \"effect\"\nimport * as RefSubject from \"@typed/fx/RefSubject\"\n\nconst program = Effect.gen(function* () {\n  const numbers = yield* RefSubject.make([1, 2, 3, 4, 5])\n\n  // Get the first even number\n  const firstEven = RefSubject.filterMap(numbers, (arr) =>\n    Option.fromNullable(arr.find((n) => n % 2 === 0))\n  )\n\n  const value = yield* firstEven\n  console.log(value) // 2\n})"
      }
    ],
    "sourceSpans": [
      {
        "file": "packages/fx/src/RefSubject/RefSubject.ts",
        "start": {
          "line": 3229,
          "column": 14
        },
        "end": {
          "line": 3264,
          "column": 3
        }
      },
      {
        "file": "packages/fx/src/RefSubject/RefSubject.ts",
        "start": {
          "line": 3230,
          "column": 3
        },
        "end": {
          "line": 3238,
          "column": 5
        }
      },
      {
        "file": "packages/fx/src/RefSubject/RefSubject.ts",
        "start": {
          "line": 3240,
          "column": 3
        },
        "end": {
          "line": 3243,
          "column": 66
        }
      },
      {
        "file": "packages/fx/src/RefSubject/RefSubject.ts",
        "start": {
          "line": 3245,
          "column": 3
        },
        "end": {
          "line": 3248,
          "column": 24
        }
      }
    ],
    "since": "1.0.0",
    "category": "Optional queries"
  }
}