Hi,
I am trying to make an integer into a binary:
543 = <<"543">>
How can I do this without
integer_to_list(list_to_binary(K)).
views:
101answers:
2
+1
A:
You can try something like
6> A = 12345.
12345
7> B = <<A:32>>.
<<0,0,48,57>>
But this requires you to know the maximum number of bits in advance.
Damodharan R
2010-10-24 22:54:37
Good Idea, but what if I don't know. Isn't there a binary option without the colon to do it. I tried _ didn't work.
2010-10-24 23:01:20
You can always do the conversion in steps. (A rem 4294967296) for each 32 bits and loop.
Daniel Luna
2010-10-25 16:46:01
+6
A:
If you want to convert 543 to <<"543">> I don't think you can find something faster than:
1> list_to_binary(integer_to_list(543)).
<<"543">>
Because in this case both functions implemented in C.
If you want to convert integer to the smallest possible binary representation you can use binary:encode_unsigned function from the new binary module like this:
1> binary:encode_unsigned(543).
<<2,31>>
2> binary:encode_unsigned(543, little).
<<31,2>>
hdima
2010-10-25 08:56:33