Javascript 在JS中获取名字和姓氏的首字母

发布于04月27日

我想使用现代JavaScript语法检索一个人的名字和姓氏的首字母.目前，我能够正确检索名字的第一个字母和姓氏的第一个字母.

我的问题是，如果有多个名字，我就无法正确检索它.

Code

const names = ["Joshua Jones of USA", "William Sanders", "Grey Charles", "Carlos James Thomas of Russia", "Peter John Parker", "Juan Carlos Tenaz Lopez III of Spain"];

function getUserInitials(name) {
  return name.split(' ').map(w => w.charAt(0).toUpperCase()).splice(0, 2);
}

for (const name of names)
  console.log(getUserInitials(name));

Expected Output

JJ、WS、GC、CT、PP、JL

推荐答案

在我的解决方案中，我将名称完全按照连词分开，并只保留开头.随后，对于每个由多个大写字母组成的单词，我也将它们分开.根据这些名称，我连接第一个和最后一个大写字母并返回结果.

解决方案#1

function getUserInitials(name) {
  // Clean up the name: remove titles, conjunctions, and punctuation
  // Carlos James Thomas of Russia ---> Carlos James Thomas
  name = name.replace(/(?:\b(?:of|the|and|in|on|at|for|with)\b|[,\.]).*$/gi, '');
  
  // Remove all-uppercase words (e.g., III)
  // Juan Carlos Tenaz Lopez III, Mexico ---> Juan Carlos Tenaz Lopez
  name = name.replace(/\b[A-Z]+\b.*$/g, '');
  
  // Remove whitespaces
  name = name.trim();
  
  // Get names
  const words = name.split(' ');

  // Get first char from First and Last name
  let result = '';
  result += words[0].charAt(0).toUpperCase();
  if (words.length > 1) result += words[words.length - 1].charAt(0).toUpperCase();

  return result;
}

// Test cases
const names = [
  "Joshua Jones of USA",
  "William Sanders",
  "Grey Charles",
  "Carlos James Thomas of Russia",
  "Peter John Parker",
  "Juan Carlos Tenaz Lopez III of Spain",
];

for (const name of names) {
  console.log(getUserInitials(name));
}

解决方案#2

我们不要过滤掉完全大写的单词，而只过滤掉罗马数字.

function getUserInitials(name) {
  // Clean up the name: remove titles, conjunctions, and punctuation
  // Juan Carlos Tenaz Lopez III of Spain ---> Juan Carlos Tenaz Lopez III
  name = name.replace(/(?:\b(?:of|the|and|in|on|at|for|with)\b).*$/gi, '');

  // Remove Jr. / Sr.
  name = name.replace(/\b(?:Jr|Sr)\.?\b/g, '').replace(/\s*\./g, '');
  
  // Remove Roman numerals
  // Juan Carlos Tenaz Lopez III ---> Juan Carlos Tenaz Lopez
  // Juan Carlos Tenaz Lopez III Another Name ---> Juan Carlos Tenaz Lopez  Another Name
  name = name.replace(/\b(?:M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3}))\b/g, '');
  
  // Just tip: After removing the Roman numerals, double spaces were left in place, so from there, we can trim the string if desired
  // Juan Carlos Tenaz Lopez  Another Name ---> Juan Carlos Tenaz Lopez
  name = name.replace(/\s{2}.*$/g, '');
  
  // Remove whitespaces
  name = name.trim();
  
  // Get names
  const words = name.split(' ');

  // Get first char from First and Last name
  let result = '';
  result += words[0].charAt(0).toUpperCase();
  if (words.length > 1) result += words[words.length - 1].charAt(0).toUpperCase();

  return result;
}

// Test cases
const names = [
  "Joshua Jones of USA",
  "William Sanders",
  "Grey Charles",
  "Carlos James Thomas of Russia",
  "Peter John Parker",
  "PETER JOHN PARKER",
  "Jr. Peter Parker",
  "Jr Peter Parker",
  "Sr. Peter Parer",
  "Sr Peter Parker",
  "Juan Carlos Tenaz LOPEZ I",
  "Juan Carlos Tenaz LOPEZ MMM EXAMPLE",
  "Juan Carlos Tenaz LOPEZ I of Spain",
  "Juan Carlos Tenaz LOPEZ II of Spain",
  "Juan Carlos Tenaz LOPEZ III of Spain",
  "Juan Carlos Tenaz LOPEZ IV of Spain",
  "Juan Carlos Tenaz LOPEZ V of Spain",
  "Juan Carlos Tenaz LOPEZ VI of Spain",
  "Juan Carlos Tenaz LOPEZ IX of Spain",
  "Juan Carlos Tenaz LOPEZ X of Spain",
  "Juan Carlos Tenaz LOPEZ XVI of Spain",
  "Juan Carlos Tenaz LOPEZ XXX of Spain",
  "Juan Carlos Tenaz LOPEZ XL of Spain",
  "Juan Carlos Tenaz LOPEZ CLX of Spain",
  "Juan Carlos Tenaz LOPEZ CD of Spain",
  "Juan Carlos Tenaz LOPEZ CM of Spain",
  "Juan Carlos Tenaz LOPEZ MMMCDXVIII of Spain",
];

for (const name of names) {
  console.log(getUserInitials(name));
}