Re: read numbers

Hi Kenneth
my problem is that I need to extract every bit separately.
So I need to first bit of each number and the second and the third etc.
I want to do bit manipulation not just read the number.

But you answered my second question on how to convert a list of digits to a
binary.
So this is the second part of my problem

29> lists:concat([1,1,0,0,1,1,0,0,1,0,1,0]).
"110011001010"
30> list_to_binary(lists:concat([1,1,0,0,1,1,0,0,1,0,1,0])).
<<"110011001010">>
31>
binary_to_integer(list_to_binary(lists:concat([1,1,0,0,1,1,0,0,1,0,1,0]))).
110011001010
32>
binary_to_integer(list_to_binary(lists:concat([1,1,0,0,1,1,0,0,1,0,1,0])),
2).
3274

Too many conversations for just a simple bit manipulation.

Thank you all for your contribution.

Kind Regards
Nikolas


Στις Πέμ 9 Δεκ 2021 στις 7:33 μ.μ., ο/η Kenneth Lundin <[email protected]>
έγραψε:

> Why not read it with
>
> ok, Data} = file:read_file("binary.input"),
>
> then split the binary to a list of lines
>
> BinList = binary:split(Data,<<"\n">>,[global])
>
> each element in the list is a binary like this:
>
>  B = <<"1010101100">>
>
> covert this to an integer with:
>
>
> binary_to_integer(B,2)
>
> and there you have your integer which you can do whatever you like with
>
>
> Note, this is written on my phone so it is not tested, could be some fauly detail
>
>
> /Kenneth
>
> On Thu, Dec 9, 2021 at 6:52 PM Java House <[email protected]> wrote:
>
>> Hi Roger thank you for replying.
>> I am having a series of 0s an1s in a List and want to convert it to a
>> decimal number.
>> I am looking for something similar to BItSet in java
>>
>> Kind Regards
>> Nikolas
>>
>> Στις Πέμ 9 Δεκ 2021 στις 3:24 μ.μ., ο/η Roger Lipscombe <
>> [email protected]> έγραψε:
>>
>>> On Thu, 9 Dec 2021 at 13:29, Java House <[email protected]> wrote:
>>> > Thank you Roger for the answer
>>> > I thought about it but since I have to parse all digits for every row
>>> that would mean a lot of entries as I have to create all possible
>>> combinations of 0/1 for every position of the row.
>>>
>>> parse(Data) -> parse(Data, [], []).
>>>
>>> parse(<<"0", Rest/binary>>, Line, Lines) ->
>>>     parse(Rest, [false | Line], Lines);
>>> parse(<<"1", Rest/binary>>, Line, Lines) ->
>>>     parse(Rest, [true | Line], Lines);
>>> parse(<<$\n, Rest/binary>>, Line, Lines) ->
>>>     parse(Rest, [], [lists:reverse(Line) | Lines]);
>>> parse(<<>>, [], Lines) -> lists:reverse(Lines);
>>> parse(<<>>, Line, Lines) -> lists:reverse([lists:reverse(Line) | Lines]).
>>>
>>> ...results in...
>>>
>>> [[true,true,true,false,true,true,false,false,true,false,true,false],
>>>  [false,true,false,false,true,true,true,false,true,true,true,false],
>>>  [true,true,false,false,false,true,false,false,true,false,true,false],
>>>  [false,false,true,true,false,true,false,true,true,true,false,true],
>>>  [true,true,false,true,false,false,false,false,false,false,true,true],
>>>  [false,true,false,true,true,false,true,true,false,false,true,false]]
>>>
>>