SOURCE

arr = [
    {
        code:'1',
        name:'张三',
        age:'18'
    },
    {
        code:'2',
        name:'李四',
        age:'19'
    },
    {
        code:'3',
        name:'王五',
        age:'20'
    }
]
// const newArray = Array.from(arr,({name}) => name)
// let str = []
// arr.forEach(item => {
//     str.push(item.name)
// })
// console.log(str.join('、'))

let newArray = []
arr.forEach(item => {
        if(item.name === '张三') newArray.push('001')
        if(item.name === '李四') newArray.push('002')
        if(item.name === '王五') newArray.push('003')
})
    console.log(newArray.join('、'))