Python has such an operator: variable = something if condition else something_else Alternatively, although not recommended (see karadoc’s comment): variable = (condition and something) or something_else
Using the static initialization order problem as an excuse to not introducing this feature to the language is and always has been a matter of status quo – it wasn’t introduced because it wasn’t introduced and people keep thinking that initialization order was a reason not to introduce it, even if the order problem has … Read more
Update: C# 9 now contains record types. public record Person { public string LastName { get; } public string FirstName { get; } public Person(string first, string last) => (FirstName, LastName) = (first, last); } Old answer: Record types are not (yet) implemented in C#. See the proposal in the official GitHub repository: https://github.com/dotnet/csharplang/blob/master/proposals/records.md Discuss … Read more
In addition to the other answers, the maximum identifier length that is accepted by the Microsoft Visual C# compiler is 511 characters. This can be tested with the following code: class Program { private static void Main(string[] args) { int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa = 5; } } The length of the variable name there is 511 characters. … Read more
Here are some of the things that made me favour Scala (over, say, usual Java): a) Type inference. The Java way of doing it: Map<Something, List<SomethingElse>> list = new HashMap<Something, List<SomethingElse>>() .. is rather verbose compared to Scala. The compiler should be able to figure it out if you give one of these lists. b) … Read more
Such an operator isn’t part of the current Delphi version because it wasn’t part of the previous version, and demand wasn’t great enough to justify the cost of adding it. (You’ll find that explanation applies to lots of features you wish you had in lots of products.) Delphi provides a set of IfThen functions in … Read more
In 2.8, you import scala.collection.JavaConversions._ and use as a Scala map. Here’s an example (in 2.8.0.RC1): scala> val jmap:java.util.Map[String,String] = new java.util.HashMap[String,String] jmap: java.util.Map[String,String] = {} scala> jmap.put(“Hi”,”there”) res0: String = null scala> jmap.put(“So”,”long”) res1: String = null scala> jmap.put(“Never”,”mind”) res2: String = null scala> import scala.collection.JavaConversions._ import scala.collection.JavaConversions._ scala> jmap.foreach(kv => println(kv._1 + ” … Read more
case is a good option as pointed out by Jan cond is also very useful in many related circumstances, particularly if you want to switch on the basis of evaluating a range of different conditional expressions, e.g. (defn account-message [balance] (cond (< balance 0) “Overdrawn!” (< balance 100) “Low balance” (> balance 1000000) “Rich as … Read more
VB is a full-fledged programming language which can be used to create compiled applications, while VBScript is a sub-set of VB and is a scripting language that can be used to run a set of commands, similar to an old-school DOS batch file. Generally, a scripting language can not be used to create a full-fledged … Read more
Douglas Crockford’s book JavaScript: The Good Parts is a prime example of this. He lists ‘features’ in JavaScript that should be avoided and provides alternatives that use the ‘good parts’ of the language. A few of the bad parts are: eval slower, harder to read, dangerously insecure == confusing and ambiguous with differently typed operands … Read more