[英]Deleting specific array element from multidimensional array?
我在循環遍歷多維數組和刪除特定元素數組時遇到問題。 我的多維數組看起來有點像這樣:
myArray = [["Tom", "161"], ["Dick", "29"], ["Harry", "46"]];
所以如果我有數字 29。循環遍歷這個數組並刪除第二個元素是 29 的數組元素的最有效方法是什么? 即[“迪克”,“29”]
var myArray = [["Tom", "161"], ["Dick", "29"], ["Harry", "46"]];
var myNewArray = myArray.filter(function(item){ return item[1] != 29 })
.filter 使用本機代碼循環遍歷您的數組。 建造一個新陣列當然可能比僅僅從舊陣列中切出一部分來進行測試更昂貴。
myArray = [["Tom", "161"], ["Dick", "29"], ["Harry", "46"]];
for(var i = 0; i <= myArray.length - 1; i++){
if(myArray[i][1] == "29"){
myArray[i].splice(0,2);
}
}
console.log(myArray);
// returns [ [ 'Tom', '161' ], [], [ 'Harry', '46' ] ]
const organizers = [
{
id: '83f58b20-011d-11ed-b71c-47e6c5dfe098',
createdAt: '2022-07-11T13:29:39.794Z',
updatedAt: '2022-07-11T13:29:39.794Z',
organizerId: '83deced0-011d-11ed-b71c-47e6c5dfe098',
tournamentId: '83b37910-011d-11ed-b71c-47e6c5dfe098',
organizerName: null
},
{
id: '83f58b21-011d-11ed-b71c-47e6c5dfe098',
createdAt: '2022-07-11T13:29:39.794Z',
updatedAt: '2022-07-11T13:29:39.794Z',
organizerId: '83e18df0-011d-11ed-b71c-47e6c5dfe098',
tournamentId: '83b37910-011d-11ed-b71c-47e6c5dfe098',
organizerName: 'MANOJ ABCD'
}
];
const removeorganizerId = "83e18df0-011d-11ed-b71c-47e6c5dfe098"
var myNewArray = organizers.filter(function(item){ return item.organizerId !== removeorganizerId });
console.log("myNewArray ===> ", myNewArray);
在這里查看演示
brbcoding的回答刪除了數組元素的內容,但不刪除。 這是一種解決方法:
myArray = [["Tom", "161"], ["Dick", "29"], ["Harry", "46"]];
document.getElementById("a").innerHTML = myArray;
for(var i = 0; i <= myArray.length - 1; i++){
if(myArray[i][1] == "29"){
myArray.splice(i--,1);
}
}
document.getElementById("b").innerHTML = myArray;
console.log(myArray);
https://jsfiddle.net/tmzshopping/dfdveazk/
拼接刪除一行(參數中的 1),您可以通過將 1 替換為 2 來刪除 2 行。 i-- 減少數組的長度。
array_name = [[1,2,3],[],['Hi','hello','world']]
let temp = []
array_name.forEach(element => {
if (element != '' || `enter condition here`) {
temp.push(element)
}
});
array_name = temp; // array_name = [ [1,2,3], ['Hi','hello','world'] ]
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