我如何在JS中写一个函数来return这个单词的缩写？

Question

例如：

makeAbbr('central processing unit') === 'CPU'

我找不到我的错误。感谢您的帮助。

function makeAbbr(words) {
  let abbreviation = words[0];
  for (let i = 1; i < words.length; i++) {
    if (words[i] === '') {
      abbreviation += words[i + 1];
    }
  }
  return abbreviation.toUpperCase();
}

console.log(makeAbbr('central processing unit'));

Answer 1

您只需要把words[i] === ''改成words[i] === ' '。 '' 是一个空字符串。

另一个选项是拆分传递的字符串。

function makeAbbr(str) {
   // words is [ "central", "processing", "unit" ]
   let words = str.split(/\s+/);
   let abbreviation = '';
   for (let i = 0; i < words.length; i++) {
     abbreviation += words[i][0];
   }
   return abbreviation.toUpperCase();
}

Answer 2

这通常适用于使用每个单词的第一个字符由 space 分隔的单词的缩写。

function makeAbbr(words) {
  // result abbreviation
  let abbreviation = '';
  // store each word into an array using split by space
  let wordArray = words.split(' ');
  // iterate through the word array
  for (let i = 0; i < wordArray.length; i++) {
    // take the first character in each word into the result abbreviation
    abbreviation += wordArray[i][0];
  }
  // return the abbreviation with all of them being upper case
  return abbreviation.toUpperCase();
}
// test case
console.log(makeAbbr('central processing unit'));

Answer 3

const sample = ('central processing unit');

const makeAbrr = (word: string) => {
        return word.split(' ').map((letter) => letter[0].toUpperCase()).join('');
}

console.log(makeAbrr(sample));

Answer 4

声明式方法可以是

const makeAbbr = str => str.split(' ').map(i => i.charAt(0).toUpperCase()).join('')

Answer 5

单线解决方案：

function makeAbbr(words) {
  return words.split(' ').map(word => word[0].toUpperCase()).join("");
}

console.log(makeAbbr('central processing unit'));

我们正在将 string 句子转换为由 space (.split(" ")) 分隔的个单词组成的数组，然后进行映射或转换数组中的每个单词到它的第一个字母，并将其大写：.map(word => word[0].toUpperCase())，然后将数组元素连接成一个字符串，以“无”"" 作为分隔符：

"central processing unit" -> ["central", "processing", "unit"] -> ["C", "P", "U"] -> "CPU"

Answer 6

正则表达式版本

function makeAbbr(text) {
  if (typeof text != 'string' || !text) {
    return '';
  }
  const acronym = text
    .match(/[\p{Alpha}\p{Nd}]+/gu)
    .reduce((previous, next) => previous + ((+next === 0 || parseInt(next)) ? parseInt(next): next[0] || ''), '')
    .toUpperCase();
  return acronym;
}
console.log(makeAbbr('central processing unit'));

Reference

我如何在JS中写一个函数来return这个单词的缩写？

How do I write a function in JS to return abbreviation of the words?

javascript

abbreviation