If Java is Strongly typed then why does this code compile?
My understanding of strongly typed was that the language wouldn’t make implicit type conversions. However, this code converts the char to it’s ascii value and then uses that value.
types
Difference between numeric, float and decimal in SQL Server
use the float or real data types only if the precision provided by decimal (up to 38 digits) is insufficient Approximate numeric data types(see table 3.3) do not store the exact values specified for many numbers; they store an extremely close approximation of the value. (Technet) Avoid using float or real columns in WHERE clause search conditions, especially the = and <> operators. It is best to … Read more
What does int & mean
It returns a reference to an int. References are similar to pointers but with some important distinctions. I’d recommend you read up on the differences between pointers, references, objects and primitive data types. “Effective C++” and “More Effective C++” (both by Scott Meyers) have some good descriptions of the differences and when to use pointers vs references. … Read more
How to check if type of a variable is string?
In Python 2.x, you would do basestring is the abstract superclass of str and unicode. It can be used to test whether an object is an instance of str or unicode. In Python 3.x, the correct test is The bytes class isn’t considered a string type in Python 3.
Accessing elements by type in JavaScript
In plain-old JavaScript you can do this: In jQuery, you would just do:
Check if a value is an object in JavaScript
UPDATE: This answer is incomplete and gives misleading results. For example, null is also considered of type object in JavaScript, not to mention several other edge cases. Follow the recommendation below and move on to other “most upvoted (and correct!) answer”: Original answer: Try using typeof(var) and/or var instanceof something. EDIT: This answer gives an idea of how to examine variable’s properties, but … Read more
“X does not name a type” error in C++
When the compiler compiles the class User and gets to the MyMessageBox line, MyMessageBox has not yet been defined. The compiler has no idea MyMessageBox exists, so cannot understand the meaning of your class member. You need to make sure MyMessageBox is defined before you use it as a member. This is solved by reversing the definition order. However, you have a cyclic dependency: if you move MyMessageBox above User, … Read more
Pointtype command for gnuplot
You first have to tell Gnuplot to use a style that uses points, e.g. with points or with linespoints. Try for example: Output: Now try: Output: You may also want to look at the output from the test command which shows you the capabilities of the current terminal. Here are the capabilities for my pngairo terminal:
what is the unsigned datatype?
unsigned really is a shorthand for unsigned int, and so defined in standard C.
Determine the type of an object?
There are two built-in functions that help you identify the type of an object. You can use type() if you need the exact type of an object, and isinstance() to check an object’s type against something. Usually, you want to use isinstance() most of the times since it is very robust and also supports type inheritance. To get the actual type of an … Read more