javascript - 基于其他数组从javascript中的数组中删除项目

Question

我想从列表中完全删除一个项目，下面是列表

var list = [{id: 1, match_number: 1, name: "match1"},
     {id: 2, match_number: 2, name: "match2"},
     {id: 3, match_number: 3, name: "match3"},
     {id: 4, match_number: 4, name: "match4"},
     {id: 5, match_number: 5, name: "match5"}]

我想match_number从列表中完全删除，并希望实现

var list = [{id: 1, name: "match1"},
     {id: 2, name: "match2"},
     {id: 3, name: "match3"},
     {id: 4, name: "match4"},
     {id: 5, name: "match5"}]

下面是我获得单个项目结果的代码，但我有一个数组，其中给出了类似的键['match_number','id']。基于此，我想从主列表中删除项目。

我该如何解决这个问题？

//code for single item
var listitem = list.map((i) => {
    const {match_number,...item} = i;
    return item;
});

标签： javascriptjqueryarraysarraylistjavascript-objects

Answer 1

map在数组上使用list可将现有的对象数组修改为没有match_number键。

var list = [
 {id: 1, match_number: 1, name: "match1"},
 {id: 2, match_number: 2, name: "match2"},
 {id: 3, match_number: 3, name: "match3"},
 {id: 4, match_number: 4, name: "match4"},
{id: 5, match_number: 5, name: "match5"}
];

list.map(obj => delete obj.match_number);
console.log(list);

对于您要删除的键数组以及不影响原始list数组，您可以使用它，

var list = [
 {id: 1, match_number: 1, name: "match1"},
 {id: 2, match_number: 2, name: "match2"},
 {id: 3, match_number: 3, name: "match3"},
 {id: 4, match_number: 4, name: "match4"},
{id: 5, match_number: 5, name: "match5"}
];
var res = [];
var removeArray = ['match_number','id'];
list.forEach((obj) => {
  let tempObj = {};
  Object.keys(obj).forEach((key)=>{
    if(removeArray.indexOf(key) === -1){
      tempObj[key] = obj[key];
    }
  });
  res.push(tempObj);
});
console.log(res);
console.log(list);