github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/ui/src/util/pick.ts (about)

     1  // Copyright 2018 The Cockroach Authors.
     2  //
     3  // Use of this software is governed by the Business Source License
     4  // included in the file licenses/BSL.txt.
     5  //
     6  // As of the Change Date specified in that file, in accordance with
     7  // the Business Source License, use of this software will be governed
     8  // by the Apache License, Version 2.0, included in the file
     9  // licenses/APL.txt.
    10  
    11  /*
    12   * Extend the TypeScript built-in type Pick to understand two levels of keys.
    13   * Useful for typing selectors that grab from a CachedDataReducer.
    14   */
    15  export type Pick<T, K1 extends keyof T, K2 extends keyof T[K1]> = {
    16    [P1 in K1]: {
    17      [P2 in K2]: T[P1][P2];
    18    };
    19  };