从嵌套的forEach循环中的最后一个结果中删除逗号

let nestedArray = [
  ['apple', 'banana'],
  ['cherry', 'date']
];

let result = nestedArray.map(subArray => subArray.join(', ')).join('; ');

console.log(result); // 输出: "apple, banana; cherry, date"

let nestedArray = [
  ['apple', 'banana'],
  ['cherry', 'date']
];

let result = nestedArray.reduce((acc, subArray) => {
  let joinedSubArray = subArray.join(', ');
  return acc ? `${acc}; ${joinedSubArray}` : joinedSubArray;
}, '');

console.log(result); // 输出: "apple, banana; cherry, date"

let nestedArray = [
  ['apple', 'banana'],
  ['cherry', 'date']
];

let tempResult = [];

nestedArray.forEach(subArray => {
  let joinedSubArray = subArray.join(', ');
  tempResult.push(joinedSubArray);
});

let result = tempResult.join('; ');

console.log(result); // 输出: "apple, banana; cherry, date"

let data = [
  { name: 'Alice', hobbies: ['reading', 'painting'] },
  { name: 'Bob', hobbies: ['swimming', 'cooking'] }
];

let output = '';

data.forEach((person, personIndex) => {
  let hobbiesString = '';
  person.hobbies.forEach((hobby, hobbyIndex) => {
    hobbiesString += hobby;
    if (hobbyIndex < person.hobbies.length - 1) {
      hobbiesString += ', ';
    }
  });
  output += `${person.name}: ${hobbiesString}`;
  if (personIndex < data.length - 1) {
    output += '; ';
  }
});

console.log(output); // 输出: "Alice: reading, painting; Bob: swimming, cooking"