hardhat/src/internal/util/lang.ts

Hardhat is an extensible developer tool that helps smart contract developers increase productivity by reliably bringing together the tools they want.

export function fromEntries<T = any>(entries: Array<[string, any]>): T {
  return Object.assign(
    {},
    ...entries.map(([name, value]) => ({
      [name]: value,
    }))
  );
}

export function mapValues<T extends object, ResultT>(
  o: T,
  callback: (value: T[keyof T]) => ResultT[keyof ResultT]
): ResultT {
  const result: any = {};

  for (const [key, value] of Object.entries(o)) {
    result[key] = callback(value);
  }

  return result;
}