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What does this line of code mean?
label.frame = (inPseudoEditMode) ? kLabelIndentedRect : kLabelRect; The ? and : confuse me.
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“Question mark” or “conditional” operator in JavaScript is a ternary operator that has three operands. The expression consists of three operands: the condition, value if true and value if false. The evaluation of the condition should result in either true/false or a boolean value.
The question mark operator, ?:, is also found in C++. Some people call it the ternary operator because it is the only operator in C++ (and Java) that takes three operands. If you are not familiar with it, it's works like an if-else, but combines operators.
The conditional operator is also known as a ternary operator. The conditional statements are the decision-making statements which depends upon the output of the expression. It is represented by two symbols, i.e., '?' and ':'.
The ternary operator take three arguments: The first is a comparison argument. The second is the result upon a true comparison. The third is the result upon a false comparison.
This is the C ternary operator (Objective-C is a superset of C):
label.frame = (inPseudoEditMode) ? kLabelIndentedRect : kLabelRect; is semantically equivalent to
if(inPseudoEditMode) { label.frame = kLabelIndentedRect; } else { label.frame = kLabelRect; } The ternary with no first element (e.g. variable ?: anotherVariable) means the same as (valOrVar != 0) ? valOrVar : anotherValOrVar
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It's the ternary or conditional operator. It's basic form is:
condition ? valueIfTrue : valueIfFalse Where the values will only be evaluated if they are chosen.
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