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In-Place Radix Sort
...though.
Btw: If you're dealing with DNA strings only: You can compress a char into two bits and pack your data quite a lot. This will cut down the memory requirement by factor four over a naiive representation. Addressing becomes more complex, but the ALU of your CPU has lots of time to spend duri...
What is the default initialization of an array in Java?
...t is a 0.
For float/double that is a 0.0
For booleans that is a false.
For char that is the null character '\u0000' (whose decimal equivalent is 0).
When you create an array of something, all entries are also zeroed. So your array contains five zeros right after it is created by new.
Note (based...
Listen for key press in .NET console app
...tic void ProcessFiles()
{
var files = Enumerable.Range(1, 100).Select(n => "File" + n + ".txt");
var taskBusy = new Task(BusyIndicator);
taskBusy.Start();
foreach (var file in files)
{
Thread.Sleep(1000);
Console.WriteLine("Pro...
Forward declaring an enum in C++
...on unit can't know what storage size will have been chosen - it could be a char or an int, or something else.
From Section 7.2.5 of the ISO C++ Standard:
The underlying type of an enumeration is an integral type that can represent all the enumerator values defined in the enumeration. It is im...
Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space
.../[\W_]+/g," ");
\W is the negation of shorthand \w for [A-Za-z0-9_] word characters (including the underscore)
Example at regex101.com
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follo...
Do I cast the result of malloc?
...ther points are also trivial, if you use the variable in your malloc call: char **foo = malloc(3*sizeof(*foo)); if quite full-proof: 3 pointers to char pointers. then loop, and do foo[i] = calloc(101, sizeof(*(foo[i])));. Allocate array of 101 chars, neatly initialized to zeroes. No cast needed. cha...
How do I do a case-insensitive string comparison?
... Greek letters is not the only special case! In U.S. English, the character "i" (\u0069) is the lowercase version of the character "I" (\u0049). However, the Turkish ("tr-TR") alphabet includes an "I with a dot" character "İ" (\u0130), which is the capital version of "i" and "I" is the cap...
Is there a method for String conversion to Title Case?
...StringBuilder(input.length());
boolean nextTitleCase = true;
for (char c : input.toCharArray()) {
if (Character.isSpaceChar(c)) {
nextTitleCase = true;
} else if (nextTitleCase) {
c = Character.toTitleCase(c);
nextTitleCase = false;
...
multiple prints on the same line in Python
...
You should use backspace '\r' or ('\x08') char to go back on previous position in console output
Python 2+:
import time
import sys
def backspace(n):
sys.stdout.write((b'\x08' * n).decode()) # use \x08 char to go back
for i in range(101): ...
Add custom messages in assert?
... Msg)
#else
# define M_Assert(Expr, Msg) ;
#endif
void __M_Assert(const char* expr_str, bool expr, const char* file, int line, const char* msg)
{
if (!expr)
{
std::cerr << "Assert failed:\t" << msg << "\n"
<< "Expected:\t" << expr_str <...