CODEWITHSUNDEEP
listnumberstype-conversionj
user884352
user884352

Reputation:

List a number's digits in J

I use the programming language: J.

I want to put all of the digit of a number in a list.

From:

12345

to:

1 2 3 4 5

What can I do?

Upvotes: 2

Views: 306

Answers (3)

kaleidic
kaleidic

Reputation: 3140

The way I'd write this is 

   10&#.^:_1

which we can see in use with this sentence: 

   (10&#.^:_1) 123456789 
1 2 3 4 5 6 7 8 9

That program relies on the reshaping built in to Base. It uses the (built-in) obverse of Base as a synonym for Antibase.

Upvotes: 5

MPelletier
MPelletier

Reputation: 16697

Another approach:

intToList =: 3 : '((>. 10 ^. y)#10) #: y'

This doesn't convert to string and back, which can be potentially costly, but counts the digits with a base-10 log, then uses anti-base (#:) to get each digit.

EDIT:

Better, safer version based on Dan Bron's comment:

intToList =: 3 : '10 #.^:_1 y'

Upvotes: 0

user884352
user884352

Reputation:

I found the answer:

intToList =: (".@;"0@":)

Upvotes: 1

Related Questions