javascript - 如何在Javascript中按字母顺序将字符串数组拆分为数组集

Question

给定一个字符串数组，如何按字母顺序将这些字符串拆分为不同的数组？

例子:

let array = ['cheese', 'corn', 'apple', 'acorn', 'beet', 'banana', 'yam', 'yucca']

// return should be something like:

a = ['apple', 'acorn']
b = ['banana', 'beet']
c = ['cheese', 'corn']
y = ['yam', 'yucca']

Answer 1

为了

let words = ["corn", "to", "add", "adhere", "tree"]

这样做

  const getSections = () => {
    if (words.length === 0) {
      return [];
    }
    return Object.values(
      words.reduce((acc, word) => {
        let firstLetter = word[0].toLocaleUpperCase();
        if (!acc[firstLetter]) {
          acc[firstLetter] = { title: firstLetter, data: [word] };
        } else {
          acc[firstLetter].data.push(word);
        }
        return acc;
      }, {})
    );
 }

将产生一个很好的分组，例如，

[{title: 'T', data: ["to", "tree"]}, ...]

这与 SectionList 非常吻合在 ReactNative 中。