我有這種型別的陣列。
[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24]
過濾陣列的要求是
- 省略每 4 項
- 采取以下4項
并繼續直到陣列結束。
最后它應該回傳 [5,6,7,8,13,14,15,16,21,22,23,24]
uj5u.com熱心網友回復：
const values = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24];
newValues = values.filter((v, i) => i % 8 > 3)
console.log(newValues)uj5u.com熱心網友回復：
您可以將塊切片并添加到結果陣列中。
const
data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24],
result = [];
let i = 0;
while (i < data.length) result.push(...data.slice(i = 4, i = 4));
console.log(...result);uj5u.com熱心網友回復：
您可以創建一個磁區函式來實作您的結果。
const arr = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24];
/**
* Pertition the array and create a new array.
*
* @param {array} arr The array to pertition.
* @param {number} skip The number of elements to skip
* @param {number} take Take the number of elements need to take after skipping.
*
* @return {array} The resulting array after pertition.
*/
const arrayAfterPertition = (arr, skip, take) => {
const length = arr.length;
let ans = [];
/** If there are not enough elements to skip then returns empty array */
if (length <= skip) return [];
let takeIndex = skip;
while (takeIndex < length) {
ans = [...ans, ...arr.slice(takeIndex, takeIndex take)];
takeIndex = takeIndex take skip;
}
return ans;
}
console.log(JSON.stringify(arrayAfterPertition(arr, 4, 4)));.as-console-wrapper {min-height: 100%!important; top: 0}uj5u.com熱心網友回復：
如果你不介意的話，洛達什。使用Loash#chunk
const nums = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24];
const chunkSize = 4;
const result = _.chunk(nums, chunkSize)
.filter((v,i) => i % 2 ===1)
.flat();
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0; }<script src="https://cdn.jsdelivr.net/lodash/4.10.0/lodash.js"></script>轉載請註明出處，本文鏈接：https://www.uj5u.com/shujuku/395635.html
標籤：javascript 数组 数据结构