在 JavaScript 中按 id 搜索并从 JSON 数组中删除对象
javascriptweb developmentfront end technologyobject oriented programmingjson
假设我们有一个对象数组，其中包含有关某些电影的数据，例如 −
const arr = [
{id: "1", name: "Snatch", type: "crime"},
{id: "2", name: "Witches of Eastwick", type: "comedy"},
{id: "3", name: "X-Men", type: "action"},
{id: "4", name: "Ordinary People", type: "drama"},
{id: "5", name: "Billy Elliot", type: "drama"},
{id: "6", name: "Toy Story", type: "children"}
];
我们需要编写一个 JavaScript 函数，该函数接受一个这样的数组作为第一个参数，并将 id 字符串作为第二个参数。然后我们的函数应该通过该 id 搜索对象，如果数组包含该对象，我们应该将其从数组中删除。
示例
其代码为 −
const arr = [
{id: "1", name: "Snatch", type: "crime"},
{id: "2", name: "Witches of Eastwick", type: "comedy"},
{id: "3", name: "X-Men", type: "action"},
{id: "4", name: "Ordinary People", type: "drama"},
{id: "5", name: "Billy Elliot", type: "drama"},
{id: "6", name: "Toy Story", type: "children"}
];
const removeById = (arr, id) => {
const requiredIndex = arr.findIndex(el => {
return el.id === String(id);
});
if(requiredIndex === -1){
return false;
};
return !!arr.splice(requiredIndex, 1);
};
removeById(arr, 5);
console.log(arr);
输出
控制台中的输出将是 −
[
{ id: '1', name: 'Snatch', type: 'crime' },
{ id: '2', name: 'Witches of Eastwick', type: 'comedy' },
{ id: '3', name: 'X-Men', type: 'action' },
{ id: '4', name: 'Ordinary People', type: 'drama' },
{ id: '6', name: 'Toy Story', type: 'children' }
]
