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Challenges

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Challenges Cumulative Counts

Challenge Given an array of numbers return the cumulative count of each item. This is the number of times an item has occurred so far. Examples [1,1,2,2,2,1,1,1,3,3] -> [1,2,1,2,3,3,4,5,1,2]...

19 answers  ·  posted 3y ago by rak1507‭  ·  last activity 10mo ago by WheatWizard‭

Question code-golf
#2: Nominated for promotion by user avatar Monica Cellio‭ · 2023-03-21T23:44:57Z (about 1 year ago)
#1: Initial revision by user avatar rak1507‭ · 2021-04-17T22:03:31Z (about 3 years ago)
Cumulative Counts
## Challenge

Given an array of numbers return the cumulative count of each item.

This is the number of times an item has occurred so far.

## Examples

```
[1,1,2,2,2,1,1,1,3,3] -> [1,2,1,2,3,3,4,5,1,2]
[3,7,5,4,9,2,3,2,6,6] -> [1,1,1,1,1,1,2,2,1,2]
```
Brownie points for beating my 7 byte APL answer.