change array column values without loop

[khalidreemy]

Hello

I need to update a column values of an array without using a loop.

Is there any way to update with criteria.


1 0.168425
2 0
3 0
4 0.752781
5 0.235684


I need to double the values below 0.5 , so the result will become like this:


1 0.33685
2 0
3 0
4 0.752781
5 0.471368