JavaScript将对象数组转换为数组对象
比方说,我们有一个关于以团队为对象排列的团队的以下数据,我们的任务是将这些数据转换为对象,以键作为角色,值作为玩家名称数组。
我们的样本数组-
const team = [{role: 'Batsman',
player: 'V Kohli'
}, {
role: 'Wicket Keeper',
player: 'KL Rahul'
}, {
role: 'Batsman',
player: 'R Sharma'
}, {
role: 'Wicket Keeper',
player: 'R Pant'
}, {
role: 'Bowler',
player: 'B Kumar'
}, {
role: 'Bowler',
player: 'M Shami'
}, ]
让我们定义一个objectify()
将数组作为参数并返回相应对象的函数。
为此的代码将是-
const objectify = (team) => {const teamObject = {};
team.forEach(member => {
if(teamObject[member.role]){
teamObject[member.role].push(member.player);
}else{
teamObject[member.role] = [member.player];
}
});
return teamObject;
}
console.log(objectify(team));
在这里,我们逐一循环遍历每个数组项,如果在teamObject中存在,则将玩家推入其值,否则我们将为单个玩家分配一个数组
这是完整的代码-
示例
const team = [{role: 'Batsman',
player: 'V Kohli'
}, {
role: 'Wicket Keeper',
player: 'KL Rahul'
}, {
role: 'Batsman',
player: 'R Sharma'
}, {
role: 'Wicket Keeper',
player: 'R Pant'
}, {
role: 'Bowler',
player: 'B Kumar'
}, {
role: 'Bowler',
player: 'M Shami'
}, ]
const objectify = (team) => {
const teamObject = {};
team.forEach(member => {
if(teamObject[member.role]){
teamObject[member.role].push(member.player);
}else{
teamObject[member.role] = [member.player];
}
});
return teamObject;
}
console.log(objectify(team));
输出结果
控制台中此代码的输出为-
{Batsman: [ 'V Kohli', 'R Sharma' ],
WicketKeeper: [ 'KL Rahul', 'R Pant' ],
Bowler: [ 'B Kumar', 'M Shami' ]
}
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