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Union Vs Concat in Linq
...mpare references of items. Your items have different references, thus they all are considered different. When you cast to base type X, reference is not changed.
If you will override Equals and GetHashCode (used to select distinct items), then items will not be compared by reference:
class X
{
...
MySQL ON vs USING?
... far as I can tell, USING() is just more convenient syntax, whereas ON allows a little more flexibility when the column names are not identical. However, that difference is so minor, you'd think they'd just do away with USING() .
...
What killed my process and why?
...
I just wrote a program that malloc'd memory in an inifite loop. After the system got slow, "Killed" was displayed in the terminal and the process was terminated. The file /var/log/kern.log contained a lot of info about the termination. -Thanks for the...
How do I put a bunch of uncommitted changes aside while working on something else
...y so the branch can continue. It doesn't create a change-set.
hg shelve --all --name "UnfinishedChanges"
hg unshelve --name "UnfinishedChanges"
Update/Edit: Newer versions of mercurial may need to use
hg shelve -n "UnfinishedChanges"
hg unshelve "UnfinishedChanges"
You can still use --name as...
What is offsetHeight, clientHeight, scrollHeight?
...
To know the difference you have to understand the box model, but basically:
clientHeight:
returns the inner height of an element in pixels, including padding but not the horizontal scrollbar height, border, or margin
offsetHeight:
is a measurement which includes the element borders, ...
Wireshark localhost traffic capture [closed]
...ns that this is not possible on Windows using Wireshark alone, you can actually record it using a workaround as mentioned in a different answer.
EDIT: Some 3 years later, this answer is no longer completely correct. The linked page contains instructions for capturing on the loopback interface.
...
How to display a dynamically allocated array in the Visual Studio debugger?
If you have a statically allocated array, the Visual Studio debugger can easily display all of the array elements. However, if you have an array allocated dynamically and pointed to by a pointer, it will only display the first element of the array when you click the + to expand it. Is there an eas...
How can I recover a removed file in Mercurial (if at all)?
Accidentally, by using a GUI as opposed to CLI, I removed every file in a Mercurial project.
9 Answers
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Select element based on multiple classes
...ces between them):
.class1.class2 {
/* style here */
}
This selects all elements with class1 that also have class2.
In your case:
li.left.ui-class-selector {
}
Official documentation : CSS2 class selectors.
As akamike points out a problem with this method in Internet Explorer 6 you mi...
How does a hash table work?
... book knows the title of the book and the exact title to boot, then that's all it should take. With the title, the person, with the aid of the librarian, should be able to find the book easily and quickly.
So, how can you do that? Well, obviously you can keep some kind of list of where you put each...