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Why is isNaN(null) == false in JS?
...false.
So in the specific case x = null, null is converted to the number 0, (try evaluating Number(null) and see that it returns 0,) and isNaN(0) returns false. A string that is only digits can be converted to a number and isNaN also returns false. A string (e.g. 'abcd') that cannot be converted t...
What is the default value for enum variable?
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It is whatever member of the enumeration represents the value 0. Specifically, from the documentation:
The default value of an enum E is the value produced by the expression (E)0.
As an example, take the following enum:
enum E
{
Foo, Bar, Baz, Quux
}
Without overriding the ...
Find the PID of a process that uses a port on Windows
... Local Address Foreign Address State PID
TCP 0.0.0.0:37 0.0.0.0:0 LISTENING 1111
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How does the const constructor actually work?
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edited Aug 18 '14 at 20:51
superEb
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answered Feb 13 '14 at ...
What Are the Differences Between PSR-0 and PSR-4?
.... However, I can't seem to grasp what the actual difference is between PSR-0 and PSR-4.
5 Answers
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How do I pass command-line arguments to a WinForms application?
... two different WinForms applications, AppA & AppB. Both are running .NET 2.0.
6 Answers
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Find the extension of a filename in Ruby
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That's really basic stuff:
irb(main):002:0> accepted_formats = [".txt", ".pdf"]
=> [".txt", ".pdf"]
irb(main):003:0> File.extname("example.pdf") # get the extension
=> ".pdf"
irb(main):004:0> accepted_formats.include? File.extname("example.pdf")
=...
How do I convert seconds to hours, minutes and seconds?
...gt;> import datetime
>>> str(datetime.timedelta(seconds=666))
'0:11:06'
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Compare two dates with JavaScript
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edited Oct 15 '19 at 20:52
Josh
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answered Jan...
What's quicker and better to determine if an array key exists in PHP?
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