相当于C# ToDictionary的JavaScript

const array = [
  { key: 'a', value: 1 },
  { key: 'b', value: 2 },
  { key: 'c', value: 3 }
];

const dictionary = {};

array.forEach(item => {
  dictionary[item.key] = item.value;
});

console.log(dictionary);
// 输出: { a: 1, b: 2, c: 3 }

const array = [
  { key: 'a', value: 1 },
  { key: 'b', value: 2 },
  { key: 'c', value: 3 }
];

const map = new Map();

array.forEach(item => {
  map.set(item.key, item.value);
});

console.log(map);
// 输出: Map { 'a' => 1, 'b' => 2, 'c' => 3 }

const array = [
  { key: 'a', value: 1 },
  { key: 'b', value: 2 },
  { key: 'c', value: 3 }
];

const dictionary = array.reduce((acc, item) => {
  acc[item.key] = item.value;
  return acc;
}, {});

console.log(dictionary);
// 输出: { a: 1, b: 2, c: 3 }

const map = new Map();
map.set('a', 1);
map.set('a', 2); // Map { 'a' => 2 }

const obj = {};
obj['a'] = 1;
obj['a'] = 2; // { a: 2 }