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How come a non-const reference cannot bind to a temporary object?
...signment to 'x'.
Note that getx() does not return a reference but a fully formed object into the local context. The object is temporary but it is not const, thus allowing you to call other methods to compute a value or have other side effects happen.
// It would allow things like this.
getPipeline...
Could someone explain the pros of deleting (or keeping) unused code?
... is a very specific case: when the code is written in a weird/un-intuitive form and the clean way of re-writing it doesn't work for a really subtle reason. This should also be applied only after a repeated attempt has been made to correct the issue and every time the attempt has re-introduced the sa...
What does `someObject.new` do in Java?
...Java in version 1.1 of the language they were originally defined as a transformation to 1.0 compatible code. If you look at an example of this transformation, I think it will make it a lot clearer how an inner class actually works.
Consider the code from Ian Roberts' answer:
public class Foo {
i...
Difference between thread's context class loader and normal classloader
... loading request to its parent, Bootstrap and if unsuccessful, loads class form jre/lib/ext directory or any other directory pointed by java.ext.dirs system property
System or Application class loader and it is responsible for loading application specific classes from CLASSPATH environment variable,...
Git Symlinks in Windows
...e fact that git commits symlinks with special filemode 120000. With this information it's possible to add a few git aliases that allow for the creation and manipulation of git symlinks on Windows hosts.
Creating git symlinks on Windows
git config --global alias.add-symlink '!'"$(cat <<'ETX'...
What is The Rule of Three?
...hows two distinct copying scenarios.
The initialization person b(a); is performed by the copy constructor.
Its job is to construct a fresh object based on the state of an existing object.
The assignment b = a is performed by the copy assignment operator.
Its job is generally a little more complicate...
How do I grant myself admin access to a local SQL Server instance?
....
rem %2 specifies the principal identity to be added (in the form "<domain>\<user>").
rem If omitted, the script will request elevation and add the current user (pre-elevation) to the sysadmin role.
rem If provided explicitly, the script is a...
How do I pass variables and data from PHP to JavaScript?
...er.
Echo the data into the page somewhere, and use JavaScript to get the information from the DOM.
Echo the data directly to JavaScript.
In this post, we'll examine each of the above methods, and see the pros and cons of each, as well as how to implement them.
1. Use AJAX to get the data you need...
Is it ever advantageous to use 'goto' in a language that supports loops and functions? If so, why?
...uch cleaner and simpler than break statements and if-checks.
Low-level performance improvements
This is only valid in perf-critical code, but goto statements execute very quickly and can give you a boost when moving through a function. This is a double-edged sword, however, because a compiler typ...
prototype based vs. class based inheritance
...same state space (read "possible values") and the same operations, thereby forming an equivalence class. If you look back at Smalltalk, since you can open a class and add methods, this is effectively the same as what you can do in Javascript.
Later OO languages wanted to be able to use static type...