array.helper.ts

export function pluck<T, K>(array: T[], key: string): K[] {
  return array.map((a) => a[key]);
}

export const pick = (obj, arr) => arr.reduce((acc, record) => (record in obj && (acc[record] = obj[record]), acc), {});

export function shuffle<T>(array: T[]): T[] {
  return array.sort(() => Math.random() - 0.5);
}

export function uniq<T>(array: T[]): T[] {
  return Array.from(new Set(array));
}

export function reduceToObject<T>(array: T[], key: string): { [K: string]: T } {
  return array.reduce((acc, curr) => {
    acc[curr[key]] = curr;

    return acc;
  }, {});
}

export function groupBy<T>(array: T[], key: string): { [key: string]: T[] } {
  return array.reduce(
    (acc, curr) => {
      if (!Object.prototype.hasOwnProperty.call(acc, curr[key])) {
        acc[curr[key]] = [];
      }

      acc[curr[key]].push(curr);

      return acc;
    },
    {} as { [key: string]: T[] }
  );
}