## What effects does using a binary collation have?

Binary collation compares your string exactly as strcmp() in C would do, if characters are different (be it just case or diacritics difference). The downside of it that the sort order is not natural. An example of unnatural sort order (as in “binary” is) : A,B,a,b Natural sort order would be in this case e.g …

## How do you convert a fraction to binary?

In university I learned it this way: Multiply by two take decimal as the digit take the fraction as the starting point for the next step repeat until you either get to 0 or a periodic number read the number starting from the top – the first result is the first digit after the comma …

## Really 1 KB (KiloByte) equals 1024 bytes?

What you are seeing is a marketing stunt. Since non-technical people don’t know the difference between Metric Meg, Gig, etc. against the binary Meg, Gig, etc. marketers for storage will use the Metric calculation, thus 1000 Bytes == 1 KiloByte. This can cause issues with development or highly technical people so you get the idea …

## How can I determine if a file is binary or text in c#? [duplicate]

There’s a method called Markov Chains. Scan a few model files of both kinds and for each byte value from 0 to 255 gather stats (basically probability) of a subsequent value. This will give you a 64Kb (256×256) profile you can compare your runtime files against (within a % threshold). Supposedly, this is how browsers’ …

## Two’s Complement Binary in Python?

It works best if you provide a mask. That way you specify how far to sign extend. >>> bin(-27 & 0b1111111111111111) ‘0b1111111111100101’ Or perhaps more generally: def bindigits(n, bits): s = bin(n & int(“1″*bits, 2))[2:] return (“{0:0>%s}” % (bits)).format(s) >>> print bindigits(-31337, 24) 111111111000010110010111 In basic theory, the actual width of the number is a …

## Getting binary content in node.js with http.request

The accepted answer did not work for me (i.e., setting encoding to binary), even the user who asked the question mentioned it did not work. Here’s what worked for me, taken from: http://chad.pantherdev.com/node-js-binary-http-streams/ http.get(url.parse(‘http://myserver.com:9999/package’), function(res) { var data = []; res.on(‘data’, function(chunk) { data.push(chunk); }).on(‘end’, function() { //at this point data is an array of …

## How to reverse an std::string? [duplicate]

I’m not sure what you mean by a string that contains binary numbers. But for reversing a string (or any STL-compatible container), you can use std::reverse(). std::reverse() operates in place, so you may want to make a copy of the string first: #include <algorithm> #include <iostream> #include <string> int main() { std::string foo(“foo”); std::string copy(foo); …

## Generate all binary strings of length n with k bits set

This method will generate all integers with exactly N ‘1’ bits. From https://graphics.stanford.edu/~seander/bithacks.html#NextBitPermutation Compute the lexicographically next bit permutation Suppose we have a pattern of N bits set to 1 in an integer and we want the next permutation of N 1 bits in a lexicographical sense. For example, if N is 3 and the …

## Convert string to binary then back again using PHP

You want to use pack and base_convert. // Convert a string into binary // Should output: 0101001101110100011000010110001101101011 \$value = unpack(‘H*’, “Stack”); echo base_convert(\$value, 16, 2); // Convert binary into a string // Should output: Stack echo pack(‘H*’, base_convert(‘0101001101110100011000010110001101101011’, 2, 16));