Don’t use the ternary operator then, it requires a third argument. You would need to reassign max to max if you don’t want it to change (max = (max < b) ? b : max). An if-statement is much more clear: if (max < b) max = b; And if you need it to be … Read more
The statements in the ternary operator need to be non-void. They need to return something. System.out.println(direction == 0 ? ‘L’ : ‘R’);
Here’s the relevant quote from the spec (§15.25.2): Boolean conditional expressions are standalone expressions (§15.2). The type of a boolean conditional expression is determined as follows: If the second and third operands are both of type Boolean, the conditional expression has type Boolean. Otherwise, the conditional expression has type boolean. Therefore, the overall expression’s type … Read more
Basically it’s following the rules of section 15.25 of the JLS, specifically: Otherwise, if the second and third operands have types that are convertible (§5.1.8) to numeric types, then there are several cases: […] Otherwise, binary numeric promotion (§5.6.2) is applied to the operand types, and the type of the conditional expression is the promoted … Read more
The Ternary operator is not identical to an if-then. You should have written it echo ($DAO->get_num_rows() == 1) ? “is” : “are”; It returns the value in the 2nd or 3rd position. It does NOT execute the statement in the 2nd or 3rd position.
It’s the Ternary Operator. Basic usage is something like $foo = (if this expressions returns true) ? (assign this value to $foo) : (otherwise, assign this value to $foo) It can be used for more than assignment though, it looks like other examples are cropping up below. I think the reason you see this in … Read more
Yes, the || operator has higher precedence than the conditional ?: operator. This means that it is executed first. From the page you link: Operator precedence determines the order in which operators are evaluated. Operators with higher precedence are evaluated first. Let’s have a look at all the operations here: step = step || (start … Read more
The compiler has an implicit conversion from a constant expression to various primitive types (so long as the value is within the appropriate range), but here the expression isn’t constant – it’s just an int expression. It’s pretty much the same as: short s; s = CallSomeMethodReturningInt32(); as far as the compiler is concerned. There … Read more
The ternary conditional operator is an operator that combines multiple expressions into a larger expression. break is a statement and not an expression, so it can’t be used inside a ternary conditional expression. You could, though, rewrite your code like this: while (current->left != nullptr) current = current->left; Hope this helps!
There’s a good chance that the ternary operator gets compiled into a cmov while the if/else results in a cmp+jmp. Just take a look at the assembly (using -S) to be sure. With optimizations enabled, it won’t matter any more anyway, as any good compiler should produce the same code in both cases.