KPACUBO

thanks for the explanation dude.
but Why in I = [12, 15] we didn't get [2, 12], [3, 27], [4, 12] and [5, 15]

sometimes its better to just take the F, learn what you can and return to it

The irony of this explanation being marked as spoiler...

But I do agree that the description it wasn't very clear, I postponed doing this kata for a few months because I couldn't understand it well at a first read.

If you were confused by the problem statement as I was, hopefully this makes it a little clearer what is being asked of:

The expression [ [p, sum of all ij of I for which p is a prime factor (p positive) of ij] ...] describes a nested array structure where:

p represents a prime factor found within the elements of the input array I.
The inner array [p, sum of all ij of I for which p is a prime factor (p positive) of ij] consists of two elements:

The first element is the prime factor p.

The second element is the sum of all elements in the array I for which p is a prime factor.
In essence, for each unique prime factor p found in the elements of array I, the resulting structure contains an inner array with p as the first element and the sum of all elements in I for which p is a prime factor as the second element.

For example:
If I = [12, 15], the resulting structure would be [[2, 12], [3, 27], [5, 15]], where:

• 2 is a prime factor of 12.
• 3 is a prime factor of both 12 and 15.
• 5 is a prime factor of 15.

Hence, the inner arrays [2, 12], [3, 27], and [5, 15] denote the prime factors found in the elements of I along with the sum of those elements for which each prime factor is applicable.

Oh god I am already scared of attempting this now lol

My solution works for everything except 'M'

if M is:
1110111

"Dot" – is 1 time unit long.
Pause between dots and dashes in a character – is 1 time unit long.

Why is the pause between the two dots not 000 as the dot is smallest time unit (111)

.0.
Expected: 'M', instead got: ''

zzz

beautiful

bruh

thanks