javascript - 将对象内的数组内的字符串元素大写

Question

我有这个对象:

let result = {
'i was sent': ["I was sent", "you were Awesome!"],
'to earth': ["to Earth" , "To moon"],
'to protect you': ["to protect you"]
}

如果我们想要将数组中所有元素的每个首字母大写并返回结果，如下所示:

 let result = {
    'i was sent you to': ["I was sent", "You were Awesome!"],
    'to earth': ["To Earth" , "To moon"],
    'to protect you': ["To protect you"],
 }

我尝试过此操作，但没有成功(请注意，大写函数适用于字符串):

Object.keys(result).forEach(function(key) {

     result[key].forEach(function(e) {
     capitalize(result[key][e]);
     });
});

console.log(result)

function capitalize(s) {
    let first_char = /\S/;
    return s.replace(first_char, function(m) {
    return m.toUpperCase();
 });

}

Answer 1

capitalize() 不会就地修改字符串，您需要使用返回的值。您可以使用 .map() 创建结果数组并将其分配回对象元素。

let result = {
  'i was sent': ["I was sent", "you were Awesome!"],
  'to earth': ["to Earth", "To moon"],
  'to protect you': ["to protect you"]
}

Object.keys(result).forEach(function(key) {
  result[key] = result[key].map(capitalize);
});

console.log(result)

function capitalize(s) {
  let first_char = /\S/;
  return s.replace(first_char, function(m) {
    return m.toUpperCase();
  });
}