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std::enable_if to conditionally compile a member function
...example to work to understand how to use std::enable_if . After I read this answer , I thought it shouldn't be too hard to come up with a simple example. I want to use std::enable_if to choose between two member-functions and allow only one of them to be used.
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jQuery hasAttr checking to see if there is an attribute on an element [duplicate]
How do you check if there is an attribute on an element in jQuery? Similar to hasClass , but with attr ?
9 Answers
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Is null check needed before calling instanceof?
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No, a null check is not needed before using instanceof.
The expression x instanceof SomeClass is false if x is null.
From the Java Language Specification, section 15.20.2, "Type comparison operator instanceof":
"At run time, the resul...
What is the difference between a map and a dictionary?
I know a map is a data structure that maps keys to values. Isn't a dictionary the same? What is the difference between a map and a dictionary 1 ?
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How to use the pass statement?
...statement. The guide I'm using defines it as being a Null statement that is commonly used as a placeholder.
16 Answers
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C++ performance vs. Java/C#
My understanding is that C/C++ produces native code to run on a particular machine architecture. Conversely, languages like Java and C# run on top of a virtual machine which abstracts away the native architecture. Logically it would seem impossible for Java or C# to match the speed of C++ because ...
Questions every good .NET developer should be able to answer? [closed]
My company is about to hire .NET developers . We work on a variety of .NET platforms: ASP.NET, Compact Framework, Windowsforms, Web Services. I'd like to compile a list/catalog of good questions, a kind of minimum standard to see if the applicants are experienced. So, my question is:
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What does “DAMP not DRY” mean when talking about unit tests?
...ifferent aspects of a code's maintainability. Maintainable code (code that is easy to change) is the ultimate goal here.
DAMP (Descriptive And Meaningful Phrases) promotes the readability of the code.
To maintain code, you first need to understand the code. To understand it, you have to read it. C...
What is the difference between a symbolic link and a hard link?
Recently I was asked this during a job interview. I was honest and said I knew how a symbolic link behaves and how to create one, but do not understand the use of a hard link and how it differs from a symbolic one.
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Should 'using' directives be inside or outside the namespace?
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There is actually a (subtle) difference between the two. Imagine you have the following code in File1.cs:
// File1.cs
using System;
namespace Outer.Inner
{
class Foo
{
static void Bar()
{
double...