让我们说我有一个Javascript数组看起来如下:
["Element 1","Element 2","Element 3",...]; // with close to a hundred elements.
什么样的方法适合将数组分成许多更小的数组,假设最多有10个元素?
让我们说我有一个Javascript数组看起来如下:
["Element 1","Element 2","Element 3",...]; // with close to a hundred elements.
什么样的方法适合将数组分成许多更小的数组,假设最多有10个元素?
当前回答
Const array = ['a', 'b', 'c', 'd', 'e']; Const size = 2; Const chunks = []; While (array.length) { chunks.push(数组。拼接(0,大小)); } console.log(块);
其他回答
一个很好的函数是:
function chunk(arr,times){
if(times===null){var times = 10} //Fallback for users wanting to use the default of ten
var tempArray = Array() //Array to be populated with chunks
for(i=0;i<arr.length/times;i++){
tempArray[i] = Array() //Sub-Arrays //Repeats for each chunk
for(j=0;j<times;j++){
if(!(arr[i*times+j]===undefined)){tempArray[i][j] = arr[i*times+j]//Populate Sub- Arrays with chunks
}
else{
j = times //Stop loop
i = arr.length/times //Stop loop
}
}
}
return tempArray //Return the populated and chunked array
}
用法如下:
chunk(array,sizeOfChunks)
我对它做了注释,这样你就能理解发生了什么。
(格式有点不对,我在移动设备上编程)
整洁干净,易于理解
let nums = [1, 2, 3, 4, 5, 6, 7, 8, 9];
let len = nums.length ;
const chunkArr = (arr, chunkNo) => {
let newArr = [];
for(let i = 0; i < len; i++){
if(nums[0] !== "" && nums[0] !== undefined ){
let a = nums.splice(0,chunkNo) ;
newArr.push(a);
}
}
return newArr ;
}
console.log(chunkArr(nums, 5));
这里是整洁和优化的实现chunk()函数。假设默认块大小为10。
var chunk = function(list, chunkSize) {
if (!list.length) {
return [];
}
if (typeof chunkSize === undefined) {
chunkSize = 10;
}
var i, j, t, chunks = [];
for (i = 0, j = list.length; i < j; i += chunkSize) {
t = list.slice(i, i + chunkSize);
chunks.push(t);
}
return chunks;
};
//calling function
var list = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12];
var chunks = chunk(list);
使用来自lodash的chunk
lodash.chunk(arr,<size>).forEach(chunk=>{
console.log(chunk);
})
嗨,试试这个——
function split(arr, howMany) {
var newArr = []; start = 0; end = howMany;
for(var i=1; i<= Math.ceil(arr.length / howMany); i++) {
newArr.push(arr.slice(start, end));
start = start + howMany;
end = end + howMany
}
console.log(newArr)
}
split([1,2,3,4,55,6,7,8,8,9],3)