获取一个数组中相同的属性的对象数组

initDependLink(arr) {

let links = {};

for (let item of arr) {

if (!links[item.target]) {

links[item.target] = [];

}

links[item.target].push(item.source);

}

let relas = [];

for (let key in links) {

let item = {

relaType1: "e2b",

relaType2: "AND",

fromIds: links[key],

toIds: [key]

};

relas.push(item)

}

console.log(relas);

},