There are actually standard one-liners for these. #include <bitset> std::string s = std::bitset< 64 >( 12345 ).to_string(); // string conversion std::cout << std::bitset< 64 >( 54321 ) << ‘ ‘; // direct output std::bitset< 64 > input; std::cin >> input; unsigned long ul = input.to_ulong(); See this run as a demo.
Strictly speaking, the term “byte” can actually refer to a unit with other than 256 values. It’s just that that’s the almost universal size. From Wikipedia: Historically, a byte was the number of bits used to encode a single character of text in a computer and it is for this reason the basic addressable element … Read more
grep –byte-offset –only-matching –text foobar filename The –byte-offset option prints the offset of each matching line. The –only-matching option makes it print offset for each matching instance instead of each matching line. The –text option makes grep treat the binary file as a text file. You can shorten it to: grep -oba foobar filename It … Read more
I think the easiest way to do this is to first convert the array to int16, array.astype(‘int16’).tofile(filename)
Consider below example Convert 2.625 to binary. We will consider the integer and fractional part separately. The integral part is easy, 2 = 10. For the fractional part: 0.625 × 2 = 1.25 1 Generate 1 and continue with the rest. 0.25 × 2 = 0.5 0 Generate 0 and continue. 0.5 × 2 = … Read more
These work for integers of any size, even greater than 32 bit: def set_bit(value, bit): return value | (1<<bit) def clear_bit(value, bit): return value & ~(1<<bit) If you like things short, you can just use: >>> val = 0b111 >>> val |= (1<<3) >>> ‘{:b}’.format(val) ‘1111’ >>> val &=~ (1<<1) ‘1101’
There is no real perfect solution. No matter what you do, someone dedicated to it will be able to steal it. Even Twitter for iPhone/iPad/Android/mac/etc. has a secret key in there, they’ve likely just obscured it somehow. For example, you could break it up into different files or strings, etc. Note: Using a hex editor … Read more
Let’s start by summarizing Java primitive data types: byte: Byte data type is an 8-bit signed two’s complement integer. Short: Short data type is a 16-bit signed two’s complement integer. int: Int data type is a 32-bit signed two’s complement integer. long: Long data type is a 64-bit signed two’s complement integer. float: Float data … Read more
You can convert between a string representation of the binary using bin() and int() >>> bin(88) ‘0b1011000’ >>> int(‘0b1011000’, 2) 88 >>> >>> a=int(‘01100000’, 2) >>> b=int(‘00100110’, 2) >>> bin(a & b) ‘0b100000’ >>> bin(a | b) ‘0b1100110’ >>> bin(a ^ b) ‘0b1000110’
Two’s complement is a clever way of storing integers so that common math problems are very simple to implement. To understand, you have to think of the numbers in binary. It basically says, for zero, use all 0’s. for positive integers, start counting up, with a maximum of 2(number of bits – 1)-1. for negative … Read more