In a simple test, when I try this: var max = Number.MAX_VALUE; var x = max + 10; var min = Number.MIN_VALUE; var y = min / 10; I find that x and max have the same value (in Chrome, IE and Firefox) so it appears that some overflows are just pegged to the max … Read more
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
“What are the differences between Integer and Int?” Integer is just an alias for java.lang.Integer. Int is the Scala integer with the extra capabilities. Looking in Predef.scala you can see this the alias: /** @deprecated use <code>java.lang.Integer</code> instead */ @deprecated type Integer = java.lang.Integer However, there is an implicit conversion from Int to java.lang.Integer if … Read more
the Integer class is provided so that values can be boxed/unboxed in a pure OO manner. use int where appropriate unless you specifically need to use it in an OO way; in which case Integer is appropriate. Java Int vs Integer However, very different things are going on under the covers here. An int is … Read more
x = [2, 4, 7, 12, 3] sum_of_all_numbers= sum(x) or you can try this: x = [2, 4, 7, 12, 3] sum_of_all_numbers= reduce(lambda q,p: p+q, x) Reduce is a way to perform a function cumulatively on every element of a list. It can perform any function, so if you define your own modulus function, it … Read more
C++11 introduces std::stoi (and variants for each numeric type) and std::to_string, the counterparts of the C atoi and itoa but expressed in term of std::string. #include <string> std::string s = std::to_string(42); is therefore the shortest way I can think of. You can even omit naming the type, using the auto keyword: auto s = std::to_string(42); … Read more
All are integers, but… 1 is decimal 0 is decimal 01 is octal 00 is octal From Java Language Specification (emphasis mine): Note that octal numerals always consist of two or more digits; 0 is always considered to be a decimal numeral – not that it matters much in practice, for the numerals 0, 00, … Read more
The simplest way that makes error checking optional that I can think of is this: char *endptr; int x = strtol(str, &endptr, 0); int error = (*endptr != ‘\0’);
This is not stored as an integer by PHP, but a float, this is why you end up with 1.0E+25 instead of 10000000000000000000000000. It’s sadly not possible to use that as an integer value in PHP, as PHP cannot save an integer of that size. If this comes from database then it will be a … Read more
You can use the PTEST instuction via the _mm_testz_si128 intrinsic (SSE4.1), like this: #include “smmintrin.h” // SSE4.1 header if (!_mm_testz_si128(xor, xor)) { // rectangle has changed } Note that _mm_testz_si128 returns 1 if the bitwise AND of the two arguments is zero.