This is actually a fairly interesting question. It’s not as simple as it looks at first. For reference, I’m going to be basing this off of the latest C11 language grammar defined in N1570 I guess the counter-intuitive part of the question is: if this is correct C: then why is this not also correct C? … Read more
You could just compare your string to the empty string: But you can abbreviate that as follows: Explanation: An if actually works by computing a value for the logical expression you give it: True or False. If you simply use a variable name (or a literal string like “hello”) instead of a logical test, the rule is: An empty string … Read more
Ruby uses the case expression instead. Ruby compares the object in the when clause with the object in the case clause using the === operator. For example, 1..5 === x, and not x === 1..5. This allows for sophisticated when clauses as seen above. Ranges, classes and all sorts of things can be tested for rather than just equality. Unlike switch statements in many other languages, Ruby’s case does not have fall-through, so … Read more