js里的表格数组某个key去重

var myarry = [ 
    {name: ‘liuyang‘,age :13}, 
    {name:‘jike‘,age:15},
    {name:‘liuyang‘,age:223 },
    {name:‘jike‘,age:42},
    {name:‘ligongjiu‘,age:22} ]
// 传入数组(表格的table)和表格的key如name
function deweight (arr, key) {
    let ret = []
    arr.forEach((item, index, self) => {
        let compare = []
        ret.forEach((retitem, retindex, retself) => {
        compare.push(retitem[key])
        })
        if (compare.indexOf(item[key]) === -1) {
        ret.push(item)
        }
    })
    return ret
}
var result = deweight(myarry,‘name‘)
console.log(result)