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difference between each.with_index and each_with_index in Ruby?
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each_with_index was introduced into Ruby earlier. with_index was introduced later:
to allow wider usage with various enumerators.
to allow index to start from a number other than 0.
Today, using with_index would be better from the point of view of generality...
Why is there an injected class name?
...rted into the scope of the class itself.
The second sentence was changed by DR 147 so C++03 says in [class]/2:
A class-name is inserted into the scope in which it is declared immediately after the class-name is seen. The class-name is also inserted into the scope of the class itself; this is k...
Notification when a file changes?
Is there some mechanism by which I can be notified (in C#) when a file is modified on the disc?
3 Answers
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Why is UnhandledExceptionEventArgs.ExceptionObject an object and not an Exception?
...hrows=true) has been applied to your assembly (will be added automatically by the C# and VB compilers).
When this attribute has been applied, non-Exception "exceptions" will be wrapped in RuntimeWrappedException.
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Setting table row height
...riginal post is six years old and some of html/css rules may have changed by now as most of the browsers are now using HTML5.
– nam
Aug 27 '17 at 15:18
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What does !! mean in ruby?
...:
!!nil #=> false
!!"abc" #=> true
!!false #=> false
It's usually not necessary to use though since the only false values to Ruby are nil and false, so it's usually best to let that convention stand.
Think of it as
!(!some_val)
One thing that is it used for legitimately is preventi...
Get dimension from XML and set text size in runtime
...sources.getDimension() method returns the value that is already multiplied by appropriate metric
– pkuszewski
Nov 14 '18 at 15:18
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Get css top value as number not as string?
...o a number, e.g:
parseInt($('#elem').css('top'));
Update: (as suggested by Ben): You should give the radix too:
parseInt($('#elem').css('top'), 10);
Forces it to be parsed as a decimal number, otherwise strings beginning with '0' might be parsed as an octal number (might depend on the browser ...
How to properly handle a gzipped page when using curl?
...l report an error.
gzip is most likely supported, but you can check this by running curl -V and looking for libz somewhere in the "Features" line:
$ curl -V
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Protocols: ...
Features: GSS-Negotiate IDN IPv6 Largefile NTLM SSL libz
Note that it's really the website in question that is at fa...
Incompatible implicit declaration of built-in function ‘malloc’
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after including <stdlib.h> the warning was replaced by an error error: conflicting types for 'malloc'
– Christos Karapapas
Nov 5 '18 at 20:17
add a comm...