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Undefined reference to static class member
...it (1) can be used as an lvalue only if it has been defined but (2) can be converted to an rvalue without being defined?
– j_random_hacker
May 29 '09 at 10:51
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When do I use a dot, arrow, or double colon to refer to members of a class in C++?
...
Dot operator is used in direct member selection scenarios.
print(a.b)
Here, we are accessing b, which is a direct member of an object a. So, primarily, a is an object and b is a member (function/ variable etc) of a.
Arrow operator is used in indirect membe...
Split output of command by columns using Bash?
...d> | while read a b; do echo $a; done
The first parameter to read, a, selects the first column, and if there is more, everything else will be put in b. As a result, you never need more variables than the number of your column +1.
So,
while read a b c d; do echo $c; done
will then output th...
How costly is .NET reflection?
...rs using your application (if it's web) and it may add up just as if you'd convert million items. If particular method is 100-times slower it will be that much slower on small and big sets. Slower is slower.
– Robert Koritnik
Jul 26 '12 at 13:17
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How to read the RGB value of a given pixel in Python?
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photo = Image.open('IN.jpg') #your image
photo = photo.convert('RGB')
width = photo.size[0] #define W and H
height = photo.size[1]
for y in range(0, height): #each pixel has coordinates
row = ""
for x in range(0, width):
RGB = photo.getpixel((x,y))
R,G,...
Operator Overloading with C# Extension Methods
...ngBuilder can be passed to ReceiveImportantMessage, which will be silently converted to a StringBuilderWrapper, where the + operator can be used.
To make this fact more transparent to callers, you can declare ReceiveImportantMessage as taking a StringBuilder and just use code like this:
private ...
How can I delete a service in Windows?
...hing for the command prompt on your start menu and then right-clicking and selecting "Run as administrator". Note to PowerShell users: sc is aliased to set-content. So sc delete service will actually create a file called delete with the content service. To do this in Powershell, use sc.exe delete se...
How to close TCP and UDP ports via windows command line
...don't think that was being asked here. I believe the question is "how do I selectively close one active connection (socket) to the port my program is listening on?". The wording of the question is a bit off because a port number for the undesired inbound client connection is given and it was referr...
Best JavaScript compressor [closed]
... sometimes be the worst compressor (output even larger than original) - it converts non-ascii characters in strings to \uxxxx literals by default.. use e.g. --charset UTF-8 (if you're sure you let the browser know about it somehow)
– mykhal
Feb 15 '12 at 9:35
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Naming Classes - How to avoid calling everything a “Manager”? [closed]
... some other libraries.
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attribute
type
helper
collection
converter
handler
info
provider
exception
service
element
manager
node
option
factory
context
item
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