如何将字符串数组转换为唯一值数组？

const stringArray = ['a', 'b', 'c', 'a', 'b', 'd'];
const uniqueArray = [...new Set(stringArray)];
console.log(uniqueArray); // 输出：['a', 'b', 'c', 'd']

const stringArray = ['a', 'b', 'c', 'a', 'b', 'd'];
const uniqueArray = stringArray.filter((value, index, self) => {
  return self.indexOf(value) === index;
});
console.log(uniqueArray); // 输出：['a', 'b', 'c', 'd']

const stringArray = ['a', 'b', 'c', 'a', 'b', 'd'];
const uniqueArray = stringArray.reduce((accumulator, currentValue) => {
  if (!accumulator.includes(currentValue)) {
    accumulator.push(currentValue);
  }
  return accumulator;
}, []);
console.log(uniqueArray); // 输出：['a', 'b', 'c', 'd']

const stringArray = ['a', 'b', 'c', 'a', 'b', 'd'];
const uniqueArray = Array.from(new Map(stringArray.map((item) => [item, true])).keys());
console.log(uniqueArray); // 输出：['a', 'b', 'c', 'd']