Try compareTo Calendar c1 = Calendar.getInstance(); Calendar c2 = Calendar.getInstance(); c1.compareTo(c2); Returns: the value 0 if the time represented by the argument is equal to the time represented by this Calendar; a value less than 0 if the time of this Calendar is before the time represented by the argument; and a value greater than … Read more
You may want to check out the answers to these similar question: Image processing language/environment
There’s a principle called “eating your own dogfood”. By using a tool, you demonstrate the usefulness of the tool. It is often asked, “if the compiler for language X isn’t written in language X, why should I risk using it?” This of course only applies to languages suitable for the domain of compiler writing.
Given an arbitrary function, f, we define a function f’ which returns 1 on input n if f halts on input n. Now, for some number x we define a function g which, on input n, returns 1 if n = x, and otherwise calls f'(n). If functional equivalence were decidable, then deciding whether g … Read more
A data structure is an abstract description of a way of organizing data to allow certain operations on it to be performed efficiently. For example, a binary tree is a data structure, as is a Fibonacci heap, AVL tree, or skiplist. Theoreticians describe data structures and prove their properties in order to show that certain … Read more
Yes, in theory. Not normally, in the real world. In the common case, async is used for I/O-bound operations, and the overhead of thread management is undetectable in comparison to them. Most of the time, asynchronous operations either take a very long time (compared to thread management) or are already completed (e.g., a cache). Note … Read more
Short version: Types in C++ are: Object types: scalars, arrays, classes, unions Reference types Function types (Member types) [see below] void Long version Object types Scalars arithmetic (integral, float) pointers: T * for any type T enum pointer-to-member nullptr_t Arrays: T[] or T[N] for any complete, non-reference type T Classes: class Foo or struct Bar … Read more
Unfortunately, no As i’m sure you’re aware, but I’ll state explicitly for completeness – there are only the 2 keywords to control the method invocation: this – this.method() – looks for method starting from the invoking instance’s class (the instance’s “top” virtual table – implied default) super – super.method() – looks for method starting from … Read more
There are two main classes of regex engines. Those based on Finite State Automaton. These are generally the fastest. They work by building a state machine, and feeding it characters from the input string. It is difficult, if not impossible, to implement some more advanced features in engines like this. Examples of FSA based engines: … Read more
Example with tables A and B: A (parent) B (child) ============ ============= id | name pid | name ———— ————- 1 | Alex 1 | Kate 2 | Bill 1 | Lia 3 | Cath 3 | Mary 4 | Dale NULL | Pan 5 | Evan If you want to find parents and their … Read more