I have an array like this
let data = [{x:1,y:2,z:3},{x:1,y:2,z:3},{x:1,y:2,z:4},{x:11,y:2,z:3}]
Now I want to get only those items whose x,y,z values are the same.so expected output should be
{x:1,y:2,z:3}
Because {x:1,y:2,z:3} has duplicate values but rest of them not so I don't want to get rest of them because they do not have any duplicates. Please tell me how can I achieve this?
For lodash 4.17.15,
You can first use _.uniqWith and _.isEqual to find the unique values.
_.uniqWith(data, _.isEqual); // [{x:1,y:2,z:3},{x:1,y:2,z:4},{x:11,y:2,z:3}]
Then use _.difference to remove the unique values from the array, leaving just the duplicates
_.difference(data, _.uniqWith(data, _.isEqual)); // [{x:1,y:2,z:3}]
_.uniqWith() on the result.let data = [{x:1,y:2,z:3},{x:1,y:2,z:3},{x:1,y:2,z:4},{x:11,y:2,z:3},{x:11,y:2,z:3}]
function filterDuplicates(data) {
let dic = {};
data.forEach(obj => {
let strObj = JSON.stringify(obj, Object.keys(obj).sort());
if(strObj in dic) {
++dic[strObj];
return;
}
dic[strObj] = 0;
})
return Object.entries(dic).filter(([key, value]) => value > 0).map(([el]) => JSON.parse(el));
}
console.log(filterDuplicates(data));
Build an object to track the duplicates and use Object.values and filter
let data = [
{ x: 1, y: 2, z: 3 },
{ x: 1, y: 2, z: 3 },
{ x: 1, y: 2, z: 4 },
{ x: 11, y: 2, z: 3 },
];
const all = {};
data.forEach(({ x, y, z }) => {
const key = `x${x}y${y}z${z}`;
all[key] = key in all ? { x, y, z } : null;
});
const res = Object.values(all).filter(Boolean);
console.log(res);
xwill be your unique key that can be passed to find duplicates?