如何過濾數組中包含多個對象的數組並返回長度

Question

我有一個包含多個對象的數組

var List = [
  {
  name: 'John',
  city: 'Denver',
  email: 'johnson@mail.com'
  },
  {
  name: '',
  city: 'Dever',
  email: 'tom@mail.com'
  },
  {
  name: 'Mark',
  city: '',
  email: '',
  }
];

我以前使用過濾器返回填寫的姓名總數。

// returned filled out names
let total_name = List.filter((c: { name: any }) => !!c.name).length;
console.log(total_name); // returns 2

我想要完成的是過濾所有三個或更多對象並獲得項目的總長度，即 9 並獲得總長度為 5 的已填寫項目的總長度。

我對我接受的答案所做的更改。

isFilledLength(arr: any[], status: string) {
  let y = 0;
  arr.forEach((item) => {
    for (const x in item) {
      if (!!item[x] && status=='filled')
        y++;
      if(status=='full')
        y++;
    }
  });
  return y;
}

Answer 1

type Tuple = [number, number]

function totalAndNonEmptyProps(arr: Record<string, unknown>[]) {
  const tuples: Tuple[] = arr.map((rec) => {
    const keys = Object.keys(rec)
    const nonEmptyKeys = keys.filter((key) => rec[key] != '')
    return [keys.length, nonEmptyKeys.length]
  })

  return tuples.reduce(([a1, a2], [c1, c2]) => [a1 + c1, a2 + c2])
}

console.log(totalPropsAndNonEmptyProps(arr)) // [9, 6]

Answer 2

 var List = [{ name: 'John', city: 'Denver', email: 'johnson@mail.com' }, { name: '', city: 'Dever', email: 'tom@mail.com' }, { name: 'Mark', city: '', email: '', } ]; function isFilledLength(arr, status) { let y = 0; arr.forEach((item) => { for (x in item) { if (!!item[x] && status=='filled') y++; if(status=='full') y++; } }); return y; } console.log('filled', isFilledLength(List, 'filled')); console.log('total filled', isFilledLength(List, 'full'));