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When to dispose CancellationTokenSource?
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Speaking about whether it's really necessary to call Dispose on CancellationTokenSource... I had a memory leak in my project and it turned out that CancellationTokenSource was the problem.
My project has a service, that is constantly reading database and...
Setting background-image using jQuery CSS property
...rnatively to what the others are correctly suggesting, I find it easier usually to toggle CSS classes, instead of individual CSS settings (especially background image URLs). For example:
// in CSS
.bg1
{
background-image: url(/some/image/url/here.jpg);
}
.bg2
{
background-image: url(/anot...
How do I search within an array of hashes by hash values in ruby?
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You're looking for Enumerable#select (also called find_all):
@fathers.select {|father| father["age"] > 35 }
# => [ { "age" => 40, "father" => "Bob" },
# { "age" => 50, "father" => "Batman" } ]
Per the documentation, it "returns an array contai...
Detect the Internet connection is offline?
...et may be to just fail gracefully, preserve the data, and alert the user.. allowing them to eventually fix the connection problem if there is one, and to continue using your app with a fair amount of forgiveness.
Sidenote: You could check a reliable site like google for connectivity, but this may n...
How to use the toString method in Java?
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object. In general, the toString
method returns a string that
"textually represents" this object.
The result should be a concise but
informative representation that is
easy for a person to read. It is
recommended that all subclasses
override this method.
The toString method fo...
IntelliJ IDEA: Move line?
I really like IntelliJ IDEA's "Move statement" shortcut ( Ctrl + Shift + ↑ / ↓ ). However -- I am not sure if this is a bug releated to ActionScript editing only -- move statement is not always what I want and sometimes it is not correct when editing AS code.
...
What is a monad?
...ld be a brief, succinct, practical explanation as to what a monad essentially is?
46 Answers
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In which order do CSS stylesheets override?
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Actually, !important participates directly in the cascade, and has nothing to do with specificity. Specificity is related to selectors, whereas !important is used with property declarations. (So you're right in saying that the ru...
How to get Git to clone into current directory
...it .
From git help clone:
Cloning into an existing directory is only allowed if the directory is empty.
So make sure the directory is empty (check with ls -a), otherwise the command will fail.
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What is the correct value for the disabled attribute?
...gt; is valid and used by W3C on their samples.
In fact, both ways works on all major browsers.
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