In PHP 7 they added the following: Type declarations allow functions to require that parameters are of a certain type at call time. If the given value is of the incorrect type, then an error is generated: in PHP 5, this will be a recoverable fatal error, while PHP 7 will throw a TypeError exception. … Read more
What’s happening is that your number is wrapping around. More specifically, you’ve got a number 30,000, which in binary is: 0111 0101 0011 0000 When you add it to itself, and carry the 1’s, you get: 1110 1010 0110 0000 (Note: it’s very easy to multiply a number by 2 in binary — just shift … Read more
Not really. Inside a struct, you can make use of bit fields. So if you know you’ll need a certain, fixed amount of entries, this would be a way to save a few bits (but note that the struct will always be padded to at least the next whole amount of bytes). Also note that … Read more
In which case should you use primitive types(int) or reference types (Integer)? As a rule of thumb, I will use a primitive (such as int) unless I have to use a class that wraps a primitive. One of the cases were one must use a wrapper class such as Integer is in the case of … Read more
There is no implicitly cast in Swift. Easy way of conversion in swift is using constructor of particular type. Like if you want to get Float from double then you can use Float(doubleValue) and Same way if you want to convert float to integer then you can use Int(floatValue). In your case: let intValue = … Read more
I think the question was not about casting primitives and wrappers in general. The question was about difference between casting int to java.lang.Long and int to java.lang.Short for example. JLS: “In addition, if the expression is a constant expression (§15.28) of type byte, short, char or int: A narrowing primitive conversion may be used if … Read more
This comparision between Java standard collections, Trove and Colt might be helpful.
In Java, integer literals are of type int by default. For some other types, you may suffix the literal with a case-insensitive letter like L, D, F to specify a long, double, or float, respectively. Note it is common practice to use uppercase letters for better readability. The Java Language Specification does not provide the … Read more
But it is not true, why? §5.2.4/1: The only effect is the evaluation of the postfix-expression before the dot or arrow. Where the postfix-expression is the expression of the object for which the call takes place. Thus a pseudo destructor call, as a call to a trivial destructor, does not end the lifetime of the … Read more
Both articles say that string is NOT a primitive type. Which it is not. If you compile and run the example code from the second article it would print: string is not a primitive type. I think the confusion about this is, that the syntax of of creating a new string is similar to creating … Read more