public rename()

in rfcs/20210731-tfjs-named-tensors/gtensor.ts [336:359]

• 12 lines of code
• 3 McCabe index (conditional complexity)

  public rename<T1 extends DName, T2 extends DName>(
    // { [key in G]: T2 }
    fromName: G extends T1 ? T1 : never,
    toName: T2
    // from: { [fromKey in G extends T1 ? T1 : never]: 'from' },
    // to: { [toKey in T2]: 'to' },
  ): GTensor<Exclude<G, T1>|T2> {

    // const fromName = Object.keys(from)[0] as string; // T1;
    // const toName = Object.keys(to)[0] as ``;

    const i = this.dimNames.findIndex(n => (n as DName) === fromName);
    if (i === undefined) {
        throw new ValueError(`${fromName} is missing from ${this.dimNames}`);
    }

    // console.log('this.dimNames:', this.dimNames);
    // console.log('i:', i);
    // console.log('toName:', toName);
    const newDimNames = [...this.dimNames] as (Exclude<G, T1>|T2)[];
    newDimNames.splice(i, 1, toName);
    // console.log('newDimNames:', newDimNames);
    return new GTensor<Exclude<G, T1>|T2>(this.tensor, newDimNames);
  }