Note: The python implementation changed between 2.7 and 3.x. I corrected the answer accordingly. For the sake of completeness, let me add two more functions to your question and explain the differences between float(int(x)), math.floor(x), round(x) and math.ceil(x). Let’s start with a question: “What integer represents best the number 1.6?” We have two possible answers … Read more
With Convert a list of characters into a string you can just do ”.join(map(str,new))
I experimented with solutions using lookup tables, but found them fraught with issues, and actually not very fast. The fastest solution turned out to be the least imaginitive: int fast_atoi( const char * str ) { int val = 0; while( *str ) { val = val*10 + (*str++ – ‘0’); } return val; } … Read more
Look into composite formatting: Console.WriteLine(“{0}.{1}.{2}”, mon, da, yer); You could also write (although it’s not really recommended): Console.WriteLine(mon + “.” + da + “.” + yer); And, with the release of C# 6.0, you have string interpolation expressions: Console.WriteLine($”{mon}.{da}.{yer}”); // note the $ prefix.
If you want to change the int to string NSString *strFromInt = [NSString stringWithFormat:@”%d”,yourintvalue];
If you don’t need the random numbers to be cryptographically secure, you can use a Linear Congruential Generator. An LCG is a formula of the form X_n+1 = X_n * a + c (mod m), it needs constant memory and constant time for every generated number. If proper values for the LCG are chosen, it … Read more
Surprisingly, when you perform operations on bytes the computations will be done using int values, with the bytes implicitly cast to (int) first. This is true for shorts as well, and similarly floats are up-converted to double when doing floating-point arithmetic. The second snippet is equivalent to: byte someVar; someVar = (int) someVar – 3; … Read more
2 ways to solve this: You can solve this by replacing A *= B with A = (A * B) or with numpy.multiply(A, B, out=A, casting=’unsafe’)
With a compiler not written by drunk college students in the wee hours of the morning, the overhead is zero. At least until you start putting in virtual functions; then you must pay the cost for the virtual dispatch mechanism. Or if you have no data in the class, in which case the class is … Read more
You need this syntax: for(int n : new int[]{1, 2, 3}) System.out.println(n);