Let’s consider the following simplified example: public class Example { public static void main(String[] args) { int[] factors = {1, 2, 3}; ArrayList<Integer> f = new ArrayList(Arrays.asList(factors)); System.out.println(f); } } At the println line this prints something like “[[I@190d11]” which means that you have actually constructed an ArrayList that contains int arrays. Your IDE and … Read more
Direct assignment: NSTimeInterval interval = 1002343.5432542; NSInteger time = interval; //time is now equal to 1002343 NSTimeInterval is a double, so if you assign it directly to a NSInteger (or int, if you wish) it’ll work. This will cut off the time to the nearest second. If you wish to round to the nearest second … Read more
You can use int and set the base to 2 (for binary): >>> binary = raw_input(‘enter a number: ‘) enter a number: 11001 >>> int(binary, 2) 25 >>> However, if you cannot use int like that, then you could always do this: binary = raw_input(‘enter a number: ‘) decimal = 0 for digit in binary: … Read more
Python’s integers can grow arbitrarily large. In order to compute the raw two’s-complement the way you want it, you would need to specify the desired bit width. Your example shows -199703103 in 64-bit two’s complement, but it just as well could have been 32-bit or 128-bit, resulting in a different number of 0xf‘s at the … Read more
There is a toInteger function you can use.
Behind the scenes a scientific number notation is always represented as a float internally. The reason is the varying number range as an integer only maps to a fixed value range, let’s say 2^32 values. The scientific representation is similar to the floating representation with significant and exponent. Further details you can lookup in https://en.wikipedia.org/wiki/Floating_point. … Read more
You can use the NSDecimalNumber class from Cocoa. It is not infinite precision, but it can represent 38 decimal digits of precision, which may be enough for what you need.
Because it’s specified by Java Language Specification. JLS 5.1.7 Boxing Conversion: If the value p being boxed is true, false, a byte, or a char in the range \u0000 to \u007f, or an int or short number between -128 and 127 (inclusive), then let r1 and r2 be the results of any two boxing conversions … Read more
Javascript represents all numbers as 64-bit double precision IEEE 754 floating point numbers (see the ECMAscript spec, section 8.5.) All positive integers up to 2^53 can be encoded precisely. Larger integers get their least significant bits clipped. This leaves the question of how can you even represent a 64-bit integer in Javascript — the native … Read more
convert to base 2: var base2 = (yourNumber).toString(2); access the characters (bits): base2[0], base2[1], base2[3], etc…