I would say its because while Math.pow(2, 53) is the largest directly representable integer, its unsafe in that its also the first value who’s representation is also an approximation of another value: 9007199254740992 == 9007199254740993 // true In contrast to Math.pow(2, 53) – 1: 9007199254740991 == 9007199254740993 // false
It’s safe provided the int is zero or positive. If it’s negative, and size_t is of equal or higher rank than int, then the int will be converted to size_t and so its negative value will instead become a positive value. This new positive value is then compared to the size_t value, which may (in … Read more
Because you did from os import *, you are (accidenally) using os.open, which indeed requires an integer flag instead of a textual “r” or “w”. Take out that line and you’ll get past that error.
Split on commas, then map to integers: map(int, example_string.split(‘,’)) Or use a list comprehension: [int(s) for s in example_string.split(‘,’)] The latter works better if you want a list result, or you can wrap the map() call in list(). This works because int() tolerates whitespace: >>> example_string = ‘0, 0, 0, 11, 0, 0, 0, 0, … Read more
I haven’t needed to use this often, but you can use the checked keyword: int x = foo(); int test = checked(x * common); Will result in a runtime exception if overflows. From MSDN: In a checked context, if an expression produces a value that is outside the range of the destination type, the result … Read more
This script works! #/bin/bash if [[ ( “$#” < 1 ) || ( !( “$1” == 1 ) && !( “$1” == 0 ) ) ]] ; then echo this script requires a 1 or 0 as first parameter. else echo “first parameter is $1” xinput set-prop 12 “Device Enabled” $0 fi But this also … Read more
You can use the same ll size modifier for %x, thus: #include <stdio.h> int main() { unsigned long long x = 123456789012345ULL; printf(“%llx\n”, x); return 0; } The full range of conversion and formatting specifiers is in a great table here: printf documentation on cppeference.com
If you’re typing the number, just type at least one of them as a float (I assume you mean Float not Double): println(3f/4) If you already have the numbers in variables, convert at least one of them with toFloat val x = 3 println(x.toFloat/4) (In each case, if you have at least one, the compiler … Read more
x = 1 y = “foo” + str(x) Please see the Python documentation: https://docs.python.org/3/library/functions.html#str
You should look at ceiling rounding up in java’s math packages: Math.ceil EDIT: Added the javadoc for Math.ceil. It may be worth reading all the method in Math. http://docs.oracle.com/javase/7/docs/api/java/lang/Math.html#ceil%28double%29 public static double ceil(double a) Returns the smallest (closest to negative infinity) double value that is greater than or equal to the argument and is equal … Read more