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How do I convert a NSString into a std::string?
...hiljordan.eu it could also be that the NSString is nil. In such a case the cast should be done like this:
// NOTE: if foo is nil this will produce an empty C++ string
// instead of dereferencing the NULL pointer from UTF8String.
This would lead you to such a conversion:
NSString *foo = @"Foo";
std...
How should equals and hashcode be implemented when using JPA and Hibernate
... Cat {
...
public boolean equals(Object other) {
//Basic test / class cast
return this.catId==other.catId;
}
public int hashCode() {
int result;
return 3*this.catId; //any primenumber
}
}
What are your favorite extension methods for C#? (codeplex.com/extensionoverflow)
...cause internally .Next(int) is made with .NextDouble() so you would save a cast, a * and a check.
– Lasse Espeholt
Sep 30 '10 at 21:15
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How to define optional methods in Swift protocol?
...xtension to disallow conforming types to customize unless you specifically cast down to its dynamicType to show you want the conformer's custom implementation.
– matthias
Oct 1 '15 at 9:54
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What does “var FOO = FOO || {}” (assign a variable or an empty object to that variable) mean in Java
... || in JS (and Perl) and the version in C, C++ and Java is that JS doesn't cast the result to a boolean. It's still a logical operator.
– Alnitak
Jun 22 '11 at 13:36
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What does |= (single pipe equal) and &=(single ampersand equal) mean
... for &. There's a bit more detail in a few cases regarding an implicit cast, and the target variable is only evaluated once, but that's basically the gist of it.
In terms of the non-compound operators, & is a bitwise "AND" and | is a bitwise "OR".
EDIT: In this case you want Folder.Attribu...
Signed versus Unsigned Integers
...es, you could do:
i = ((int) b[j]) << 8 | b[j+1]
(should probably cast the 2nd byte, but I'm guessing the compiler will do the right thing)
With signed values you would have to worry about sign extension and do:
i = (((int) b[i]) & 0xFF) << 8 | ((int) b[i+1]) & 0xFF
...
Rails detect if request was AJAX
...context, you have to treat them not as not booleans, but ones that will be cast to bool. Above env['HTTP_X_REQUESTED_WITH'] =~ /XMLHttpRequest/ returns 0 not false. And 0 is actually truthy, not falsey in ruby: 0 || 1 => 0 But I'm going to alter my post for clarity.
– pixele...
How do I set a conditional breakpoint in gdb, when char* x points to a string whose value equals “he
...gdb might not know the return type of strcmp. That means you would have to cast, otherwise it would always evaluate to true!
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Filtering a list of strings based on contents
...abc']
In Python 3, it returns an iterator instead of a list, but you can cast it:
>>> list(filter(lambda k: 'ab' in k, lst))
['ab', 'abc']
Though it's better practice to use a comprehension.
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