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Apr 26, 2012 · 323. This is the ternary conditional operator, which can be used anywhere, not just the print statement. It's sometimes just called "the ternary operator", but it's not the only ternary operator, just the most common one. Here's a good example from Wikipedia demonstrating how it works: A traditional if-else construct in C, Java and JavaScript ...
Jun 7, 2011 · Please edit to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers in the help center . – Community Bot
Oct 24, 2011 · Some Other Uses of Question marks in regular expressions. Apart from what's explained in other answers, there are still 3 more uses of Question Marks in regular expressions. Negative Lookahead. Negative lookaheads are used if you want to match something not followed by something else.
Feb 3, 2011 · 1. Most likely the '?' is the ternary operator. Its grammar is: RESULT = (COND) ? (STATEMEN IF TRUE) : (STATEMENT IF FALSE) It is a nice shorthand for the typical if-else statement:
The question mark is the conditional operator. The code means that if f==r then 1 is returned, otherwise, ...
It means that the value type in question is a nullable type Nullable types are instances of the System.Nullable struct. A nullable type can represent the correct range of values for its underlying value type, plus an additional null value.
Question marks have different meaning in C# depending on the context. The Null-Conditional Operator (MSDN, What does the question mark in member access mean in C#?) The Conditional Operator/Ternary Operator (MSDN, Benefits of using the conditional ?: (ternary) operator) return isTrue ?
Feb 12, 2016 · 118. In the Eclipse Helios Java Package Explorer, I see the Java class icons display a small question mark to the right of the 'J', something like [J?]. This icon is shown on each class within one package in my project, but I cannot find an explanation for this in the documentation. At some point I expect them to disappear and be replaced with ...
778. It's the null conditional operator. It basically means: "Evaluate the first operand; if that's null, stop, with a result of null. Otherwise, evaluate the second operand (as a member access of the first operand)." In your example, the point is that if a is null, then a?.PropertyOfA will evaluate to null rather than throwing an exception ...
Mar 21, 2017 · It's less than ideal, however, in that it is very verbose. This is where the question mark operator ? comes in. The above can be rewritten as: fn do_the_thing(i: i32) -> Result<i32, Error> { let i = halves_if_even(i)?; // use `i` } which is much more concise. What ? does here is equivalent to the match statement above with an addition. In short:
