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Difference between outline and border
...e CSS outline property is a confusing property. When you first learn about it, it's hard to understand how it is even remotely different from the border property. The W3C explains it as having the following differences:
1.Outlines do not take up space.
2.Outlines may be non-rectangular.
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Python Create unix timestamp five minutes in the future
...to create an "Expires" value 5 minutes in the future, but I have to supply it in UNIX Timestamp format. I have this so far, but it seems like a hack.
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The data-toggle attributes in Twitter Bootstrap
What does data-toggle attributes do in Twitter Bootstrap? I couldn't find an answer in Bootstrap API.
10 Answers
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What exactly is metaprogramming?
...latform . Some comments in the article refer to metaprogramming as the ability to generate code (perhaps on the fly).
7 An...
class
...nt self object (which inside a class or module body is the class or module itself). Usually, this is used to define class/module ("static") methods:
class String
class << self
def value_of obj
obj.to_s
end
end
end
String.value_of 42 # => "42"
This can also be written...
Why are C# interface methods not declared abstract or virtual?
C# methods in interfaces are declared without using the virtual keyword, and overridden in the derived class without using the override keyword.
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Resolve absolute path from relative path and/or file name
... interpret the first argument relative to the path of the executing batch. It does have a shortcoming though: it miserably fails if the first argument is fully-qualified.
If you need to support both relative and absolute paths, you can make use of Frédéric Ménez's solution: temporarily change th...
Regex lookahead, lookbehind and atomic groups
...obarbarfoo:
bar(?=bar) finds the 1st bar ("bar" which has "bar" after it)
bar(?!bar) finds the 2nd bar ("bar" which does not have "bar" after it)
(?<=foo)bar finds the 1st bar ("bar" which has "foo" before it)
(?<!foo)bar finds the 2nd bar ("bar" which does not have "foo" before...
Why does Java allow us to compile a class with a name different than the file name?
I have a file Test.java and the following code inside it.
8 Answers
8
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Test for existence of nested JavaScript object key
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You have to do it step by step if you don't want a TypeError because if one of the members is null or undefined, and you try to access a member, an exception will be thrown.
You can either simply catch the exception, or make a function to ...