如何在 JS 中设置默认值来设置 Map 和/或 value++

Question

const salaries = {
  Progger: {salary: 1000, tax: '15%'},
  Tester: {salary: 800, tax: '10%'},
  Manager: { salary: 1000, tax: '10%' },
  Designer: { salary: 600, tax: '30%' },
  Artist: { salary: 1500, tax: '15%' }
};

const team = [
  { name: 'Vasya', specialization: 'Tester' },
  { name: 'Taras', specialization: 'Tester' },
  { name: 'Taras I', specialization: 'Tester' },
  { name: 'Tapas', specialization: 'Humor' },
  { name: 'Misha', specialization: 'Manager' },
  { name: 'Max', specialization: 'Designer' },
  { name: 'Vova', specialization: 'Designer' },
  { name: 'Leo', specialization: 'Artist' }
];

function calculateTeamFinanceReport(salaries, team) {
  const proffNames = Object.keys(salaries);
  let proffesions = new Map();
  let result = {};
  let value;

  // for (let every of proffNames) {
  //   proffesions.set(every, 0)
  // }

  for (let i = 0; i < team.length; i++) {
    let specialization = team[i].specialization;
    if (proffNames.some(proffesion => {   //specialisation has to be salaries `team.specialization == salaries[any]`
      if (specialization === proffesion) {
        value = value || 0;
        proffesions.set(proffesion, value++); // Right count here needed
      }
    }))
      i++;
  }
  return proffesions
}

结果 = 'Progger' => 1, '测试员' => 4, '经理' => 5, '设计师' => 7, '艺术家' => 8

我需要在这里统计有多少人拥有确切的职业。相反，我得到了总数。 另外，来自

specialisation

的

team

必须位于

salaries

中，否则 = 忽略并继续。

team.specialization == salaries[any]

如何获得每个职业的正确计数？ 或者如何为

1

地图对象设置默认值

proffesions

然后 ++ 它？

Answer 1

• value

  是

  salaries[proffesion]['salary']

• 如果

  proffesion

  对象（原本是

  dept

  ）中没有

  result = {}

  ，则将其添加到

  dept

  对象并在

  .set()

  地图中

  proffesions

  。
• 然后将

  .get()

  中的

  proffesion

  映射并将

  proffesions

  添加到

  value

   中的 

  salary最后
dept[proffesion]
• 新的

  .set()

  到

  value

  地图。

proffesions

Answer 2

此函数将返回 team 数组中提供的团队的总成员数。

function totalMembers(teams, selectedTeam) {
     return teams.filter(team => team === selectedTeam)?.length;
 }

将

function calculateTeamFinanceReport(salaries, team) {
    const teamHashTable = {};
    let totalMember = 1;
    for (const specialization in salaries) {
        const teamSpecializations = team.map(t => t.specialization);
        totalMember += totalMembers(teamSpecializations, specialization);
        teamHashTable[specialization] = totalMember;
    }
    return teamHashTable;
}

作为专业化，然后将其保存为专业化，然后从那里开始下一回合，依此类推。

输出：

希望这个答案对你有帮助！

Answer 3

totalMember