Quick question. I need to create an array using duplicated index. For example, I have an array like:
var array = [2, 3, 2, 4, 3, 2, 6, 7];
And I need to get a new loop interaction for each duplicate index, the response should be something like:
[
[2, 3, 4, 6, 7],
[2, 3],
[2],
]
Please let me know if is possible and how to create some function to do it.
Thank you!
You can just use one object to store number of occurrences for each element and use that value to create result array.
var array = [2, 3, 2, 4, 3, 2, 6, 7];
var obj = {}, result = []
array.forEach(function(e) {
obj[e] == undefined ? obj[e] = 0 : obj[e] += 1;
result[obj[e]] = (result[obj[e]] || []).concat(e)
})
console.log(JSON.stringify(result))you can do something like this
var array = [2, 3, 2, 4, 3, 2, 6, 7];
array.sort();
let idx = 0, result = [];
for(let i=0; i<array.length; i++){
if(i>0 && array[i] != array[i-1]){
idx = 0;
}
if(idx == result.length)
result[idx] = [];
result[idx].push(array[i]);
idx++;
}
console.log(result);
