js数组操作
let arr = [
{age:18,name:a}
{age:13,name:b}
{age:18,name:c}
{age:4,name:e}
]
遍历arr数组,如果age是18,把当前这个数据name字段加入当前数据后面
最后结果是这样:
let arr = [
{age:18,name:a}
{name:a}
{age:13,name:b}
{age:18,name:c}
{name:c}
{age:4,name:e}
]
回答
arr.reduce((res, item) => { res.push(item)
item.age == 18 && res.push({name: item.name})
return res
}, [])
提问之前麻烦自己先检查一下自己提出的问题
var arr5 = [ {age:18,name:'a'},
{age:13,name:'b'},
{age:18,name:'c'},
{age:4,name:'e'},
]
for(let i = 0;i<arr5.length;i++){
if(arr5[i].age == 18){
let obj = {name:arr5[i].name}
arr5.splice(i+1,0,obj)
}
}
console.log('这是什么?',arr5)
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