Finds the amount of times a value occurs in an array of objects

FindAmountOfTimesAValueOccurs

  calculate() {
    const programs = [];
    const arrayOfNames = [
      ...new Set(this.props.accounts.map(item => item.Program))
    ].map(item => {
      programs.push({ program: item, amount: 0 });
    });

    this.props.accounts.map(item => {
      const index = programs.map(e => e.program).indexOf(item.Program);
      programs[index].amount++;
    });
    console.log("arr", programs);
    return programs
  }