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Consistency of hashCode() on a Java string
... a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
EDIT
Since...
Ruby optional parameters
...ameters:
array = [1, 2, 97, 98, 99]
p array.ascii_to_text([32, 126, 1]) # Convert all ASCII values of 32-126 to their chr value otherwise keep it the same (That's what the optional 1 is for)
output: ["1", "2", "a", "b", "c"]
Okay, cool that works as planned. Now let's check and see what happens ...
What is TypeScript and why would I use it in place of JavaScript? [closed]
...ercome any kind of issues caused by incorrect or missing definition files.
Converting from JavaScript to TypeScript
Any .js file can be renamed to a .ts file and ran through the TypeScript compiler to get syntactically the same JavaScript code as an output (if it was syntactically correct in the fir...
Closure in Java 7 [closed]
...
Here is Neal Gafter's blog one of the pioneers introducing closures in Java. His post on closures from January 28, 2007 is named A Definition of Closures On his blog there is lots of information to get you started as well as videos. An here is an excellent Google talk - A...
When to use IList and when to use List
I know that IList is the interface and List is the concrete type but I still don't know when to use each one. What I'm doing now is if I don't need the Sort or FindAll methods I use the interface. Am I right? Is there a better way to decide when to use the interface or the concrete type?
...
Is there a method that calculates a factorial in Java?
... for this one to reuse?
I could use such a method with standard types (Eg. int, long...) and with BigInteger / BigDecimal, too.
...
How do C++ class members get initialized if I don't do it explicitly?
...pile error if you do not explicitly initialize it.
For primitive types (pointers, ints, etc), they are not initialized -- they contain whatever arbitrary junk happened to be at that memory location previously.
For references (e.g. std::string&), it is illegal not to initialize them, and your c...
Enum ToString with user friendly strings
...
I created a reverse extension method to convert the description back into an enum value:
public static T ToEnumValue<T>(this string enumerationDescription) where T : struct
{
var type = typeof(T);
if (!type.IsEnum)
throw new ArgumentExceptio...
What is a NullReferenceException, and how do I fix it?
... different meanings:
Object variables which are uninitialized and hence point to nothing. In this case, if you access properties or methods of such objects, it causes a NullReferenceException.
The developer is using null intentionally to indicate there is no meaningful value available. Note that C#...
The new keyword “auto”; When should it be used to declare a variable type? [duplicate]
... being created, just by looking at the code.
1. Avoid using new and raw-pointers though.
Sometime, the type is so irrelevant that the knowledge of the type is not even needed, such as in expression template; in fact, practically it is impossible to write the type (correctly), in such cases auto...