let a = [{
id: "1",
name: "test1",
count: 2
},{
id: "2",
name: "test2",
count: 3
}]
let b = [{
id: "1",
name: "test1",
count: 1
},{
id: "3",
name: "test3",
count: 3
}]
//
[{
id: "1",
name: "test1"
count: 1
},{
id: "2",
name: "test2",
count: 3
},{
id: "3",
name: "test3",
count: 3
}]
""
function update(dst, src) {
for(let key in src) dst[key] = src[key];
}
// Create index
let index = {};
a.forEach((v, k) => index[v.id] = k);
b.forEach(v => {
if(v.id in index) update(a[index[v.id]], v);
else a.push(v);
});
in addition, reasoning is "gracefully"-sharp (funny).
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