如何从数组中删除对象? 我希望从someArray中删除包含名称Kristian的对象。例如:
someArray = [{name:"Kristian", lines:"2,5,10"},
{name:"John", lines:"1,19,26,96"}];
我想实现:
someArray = [{name:"John", lines:"1,19,26,96"}];
如何从数组中删除对象? 我希望从someArray中删除包含名称Kristian的对象。例如:
someArray = [{name:"Kristian", lines:"2,5,10"},
{name:"John", lines:"1,19,26,96"}];
我想实现:
someArray = [{name:"John", lines:"1,19,26,96"}];
当前回答
具有es6箭头功能
let someArray = [
{name:"Kristian", lines:"2,5,10"},
{name:"John", lines:"1,19,26,96"}
];
let arrayToRemove={name:"Kristian", lines:"2,5,10"};
someArray=someArray.filter((e)=>e.name !=arrayToRemove.name && e.lines!= arrayToRemove.lines)
其他回答
虽然这可能不适合这种情况,我发现前几天,如果你不需要改变数组的大小,你也可以使用delete关键字从数组中删除一个项目。
var myArray = [1,2,3];
delete myArray[1];
console.log(myArray[1]); //undefined
console.log(myArray.length); //3 - doesn't actually shrink the array down
最简单的解决方案是创建一个映射,按名称存储每个对象的索引,如下所示:
//adding to array
var newPerson = {name:"Kristian", lines:"2,5,10"}
someMap[ newPerson.name ] = someArray.length;
someArray.push( newPerson );
//deleting from the array
var index = someMap[ 'Kristian' ];
someArray.splice( index, 1 );
const someArray = [{name:"Kristian", lines:"2,5,10"}, {name:"John", lines:"1,19,26,96"}];
我们得到对象的索引它的name属性值为"Kristian"
const index = someArray.findIndex(key => key.name === "Kristian");
console.log(index); // 0
通过使用拼接函数我们删除了name属性值为“Kristian”的对象
someArray.splice(index,1);
console.log(someArray); // [{name:"John", lines:"1,19,26,96"}]
使用javascript的splice()函数。
这可能会有帮助:http://www.w3schools.com/jsref/jsref_splice.asp
这里有一个映射和拼接的例子
const arrayObject = [ {name: "name1", value: "value1"}, {name: "name2", value: "value2"}, {name: "name3", value: "value3"}, ]; let index = arrayObject.map((item) => item.name).indexOf("name1"); If(索引> -1){ arrayObject。拼接(指数(1); console.log(“结果”,arrayObject); }
输出
Result [
{
"name": "name2",
"value": "value2"
},
{
"name": "name3",
"value": "value3"
}
]