将数组拆分为多个包含字符串的数组

Question

我想取一个任意长度的数组（在这个例子中长度为 10）：

var fruits = ["Banana", "Orange", "Apple", "Mango", "Strawberry", "Lime", "Kiwi", "Melon", "Pineapple", "Date"];

我想从这个数组中获取以 5 为增量的元素，将每个增量转换为一个字符串，然后将每个字符串作为一个嵌套数组存储在一个新数组中。每个元素都需要用“%”分隔。

类似的输出：

newArray = [[ 'Banana%Orange%Apple%Mango%Strawberry' ],[ 'Lime%Kiwi%Melon%Pineapple%Date' ]]

要转换成我正在使用的字符串：

var finalArray = Array()
    var x = ""
        for(i = 0; i < fruits.length; i++){
            if(i==fruits.length-1){
                x = x + fruits[i].toString()
            }
            else {
                x = x + fruits[i].toString()+'%'
            }       
        } finalArray.push([x])

哪些输出：

[['Banana%Orange%Apple%Mango%Strawberry%Lime%Kiwi%Melon%Pineapple%Date']]

我尝试了许多 for & forEach 循环、if/else 语句等，以便在应用字符串转换代码之前将原始数组拆分为增量 5，但均未成功。

任何有关如何实现的帮助或想法将不胜感激。谢谢。

编辑：谢谢大家，这已经回答了我的问题:)

Answer 1

您可以使用Array#splice 并裁剪数组直到它为空：

var fruits = ["Banana", "Orange", "Apple", "Mango", "Strawberry", "Lime", "Kiwi", "Melon", "Pineapple", "Date"];

var result = [];

while (fruits.length) {
  result.push([fruits.splice(0, 5).join('%')]);
}

console.log(result);

Answer 2

您可以对数组进行切片并将其与所需的分隔符连接起来。

这种方法不会改变给定的数据。

var fruits = ["Banana", "Orange", "Apple", "Mango", "Strawberry", "Lime", "Kiwi", "Melon", "Pineapple", "Date"],
    separator = '%',
    size = 5,
    index = 0,
    result = [];

while (index < fruits.length) {
    result.push([fruits.slice(index, index += size).join(separator)]);
}

console.log(result);

Answer 3

请将array splice 和join 与所需的分隔符一起使用。

这种方法不会改变现有数据。

var fruits = ["Banana", "Orange", "Apple", "Mango", "Strawberry", "Lime", "Kiwi", "Melon", "Pineapple", "Date"],
separator = '%',
result = []

while (fruits.length) {
  result.push([fruits.splice(0, 5).join(separator)]);
}

console.log(result);

Answer 4

您可以使用splice() 分割和加入所需的字符串.join()

var fruits = ["Banana", "Orange", "Apple", "Mango", "Strawberry", "Lime", "Kiwi", "Melon", "Pineapple", "Date"];

function convert(array, increment, separator) {
    let result = [];
    while(array.length >= 1) {
        result.push([array.splice(0, increment).join(separator)]);
    }    
    return result;
}
console.log(convert(fruits, 5, '%'));
console.log(convert(fruits, 3, '%'));

Answer 5

const fruits = ["Banana", "Orange", "Apple", "Mango", "Strawberry", "Lime", "Kiwi", "Melon", "Pineapple", "Date"];
const result = []

// Loop over all the fruits.
for(let i = 0; i < fruits.length; i++){
  // Get the current fruit's sub-index.
  let idx = Math.floor(i/5);
  // Make sure the subarray exists.
  result[idx] = result[idx] || [];
  // Push the current fruit to the subarray.
  result[idx].push(fruits[i]);
}

// Now we have an nested array of arrays, you want to replace the sub-arrays with joined strings.
for(let i = 0; i < result.length; i++){
  result[i] = [result[i].join('%')];
}

console.log(result);