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大小：2.57 KB · 修改：2022-11-21 20:05:12 · 权限：0644 · 可写

{"version":3,"file":"set-array.mjs","sources":["../src/set-array.ts"],"sourcesContent":["/**\n * Gets the index associated with `key` in the backing array, if it is already present.\n */\nexport let get: (strarr: SetArray, key: string) => number | undefined;\n\n/**\n * Puts `key` into the backing array, if it is not already present. Returns\n * the index of the `key` in the backing array.\n */\nexport let put: (strarr: SetArray, key: string) => number;\n\n/**\n * Pops the last added item out of the SetArray.\n */\nexport let pop: (strarr: SetArray) => void;\n\n/**\n * SetArray acts like a `Set` (allowing only one occurrence of a string `key`), but provides the\n * index of the `key` in the backing array.\n *\n * This is designed to allow synchronizing a second array with the contents of the backing array,\n * like how in a sourcemap `sourcesContent[i]` is the source content associated with `source[i]`,\n * and there are never duplicates.\n */\nexport class SetArray {\n  private declare _indexes: { [key: string]: number | undefined };\n  declare array: readonly string[];\n\n  constructor() {\n    this._indexes = { __proto__: null } as any;\n    this.array = [];\n  }\n\n  static {\n    get = (strarr, key) => strarr._indexes[key];\n\n    put = (strarr, key) => {\n      // The key may or may not be present. If it is present, it's a number.\n      const index = get(strarr, key);\n      if (index !== undefined) return index;\n\n      const { array, _indexes: indexes } = strarr;\n\n      return (indexes[key] = (array as string[]).push(key) - 1);\n    };\n\n    pop = (strarr) => {\n      const { array, _indexes: indexes } = strarr;\n      if (array.length === 0) return;\n\n      const last = (array as string[]).pop()!;\n      indexes[last] = undefined;\n    };\n  }\n}\n"],"names":[],"mappings":"AAAA;;;IAGW,IAA2D;AAEtE;;;;IAIW,IAA+C;AAE1D;;;IAGW,IAAgC;AAE3C;;;;;;;;MAQa,QAAQ;IAInB;QACE,IAAI,CAAC,QAAQ,GAAG,EAAE,SAAS,EAAE,IAAI,EAAS,CAAC;QAC3C,IAAI,CAAC,KAAK,GAAG,EAAE,CAAC;KACjB;CAuBF;AArBC;IACE,GAAG,GAAG,CAAC,MAAM,EAAE,GAAG,KAAK,MAAM,CAAC,QAAQ,CAAC,GAAG,CAAC,CAAC;IAE5C,GAAG,GAAG,CAAC,MAAM,EAAE,GAAG;;QAEhB,MAAM,KAAK,GAAG,GAAG,CAAC,MAAM,EAAE,GAAG,CAAC,CAAC;QAC/B,IAAI,KAAK,KAAK,SAAS;YAAE,OAAO,KAAK,CAAC;QAEtC,MAAM,EAAE,KAAK,EAAE,QAAQ,EAAE,OAAO,EAAE,GAAG,MAAM,CAAC;QAE5C,QAAQ,OAAO,CAAC,GAAG,CAAC,GAAI,KAAkB,CAAC,IAAI,CAAC,GAAG,CAAC,GAAG,CAAC,EAAE;KAC3D,CAAC;IAEF,GAAG,GAAG,CAAC,MAAM;QACX,MAAM,EAAE,KAAK,EAAE,QAAQ,EAAE,OAAO,EAAE,GAAG,MAAM,CAAC;QAC5C,IAAI,KAAK,CAAC,MAAM,KAAK,CAAC;YAAE,OAAO;QAE/B,MAAM,IAAI,GAAI,KAAkB,CAAC,GAAG,EAAG,CAAC;QACxC,OAAO,CAAC,IAAI,CAAC,GAAG,SAAS,CAAC;KAC3B,CAAC;AACJ,CAAC,GAAA;;;;"}