js 数据格式转换

Question

var propertie = [
    {
        properties:{
            cp:[123.23,345],
            name: "吉林市"
        }
    },
    {
        properties:{
            cp:[123.23,345],
            name: "长春市"
        }
    }
]

要这样的数据格式

 var geoCoordMap = {
    '长春市': [122, 23],
    '吉林市': [126.661669, 45.742347],
    
}

Answer 1

[
    {
        properties:{
            cp:[123.23,345],
            name: "吉林市"
        }
    },
    {
        properties:{
            cp:[123.23,345],
            name: "长春市"
        }
    }
].reduce((res, {properties: {cp, name}}) => (res[name] = cp, res), {})

Answer 2

function transform(data){
     const res = new Map()
     data.forEach(({properties:{name:key,cp:values} }) => {
         res.set(key, values)
    })
    return res
}

Answer 3

function transform(arr) {
    for (var i = arr.length, ret = {}; i--; ret[arr[i].properties.name] = arr[i].properties.cp);
    return ret;
}
console.dir(transform(propertie));