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PHP 5: const vs static
...s 10
echo ClassName::MY_CONST; // returns 5
ClassName::$my_var = 20; // now equals 20
ClassName::MY_CONST = 20; // error! won't work.
Public, protected, and private are irrelevant in terms of consts (which are always public); they are only useful for class variables, including static variable....
How to track down log4net problems
...nder in my project. I made a few changes to the database and the code, and now the database appender doesn't work anymore. I'll figure out why eventually, but it would help a lot if I could see what's going on inside log4net.
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[A]System.Web.WebPages.Razor.Configuration.HostSection cannot be cast to… web.config issue
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I followed the guide and now I can't run my site in debug mode - tells me "... Project with output type of Class Library cannot be started..."
– Matt
Sep 2 '14 at 19:35
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What does middleware and app.use actually mean in Expressjs?
... a late answer to add something not mentioned in the previous answers.
By now it should be clear that middleware is/are function(s) run between the client request and the server answer. The most common middleware functionality needed are error managing, database interaction, getting info from stati...
When should I use std::thread::detach?
Sometime I have to use std::thread to speed up my application. I also know join() waits until a thread completes. This is easy to understand, but what's the difference between calling detach() and not calling it?
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Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=
..., and will speed sorts up slightly.
UPDATE: utf8mb4/utf8mb4_unicode_ci is now the preferred character set/collation method. utf8_general_ci is advised against, as the performance improvement is negligible. See https://stackoverflow.com/a/766996/1432614
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Transform DateTime into simple Date in Ruby on Rails
... century
%Z - Time zone name
%% - Literal ``%'' character
t = Time.now
t.strftime("Printed on %m/%d/%Y") #=> "Printed on 04/09/2003"
t.strftime("at %I:%M%p") #=> "at 08:56AM"
share
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SQL Server insert if not exists best practice
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Don't know why anyone else hasn't said this yet;
NORMALISE.
You've got a table that models competitions? Competitions are made up of Competitors? You need a distinct list of Competitors in one or more Competitions......
You shoul...
How to use a WSDL
...nce in VS won't work. However, the provider does want YOU (I mean OP) to know all you need to know about the service contract, that's why they sent the WSDL file. Now the OP needs to generate the proxy code from it, the question is how.
– azheglov
Aug 19 '09 ...
Abort makefile if variable not set
...))$(if $(value @), \
required by target `$@')))
So that, now a failed check produces a nicely formatted output:
Makefile:7: *** Undefined BAR (baz value) required by target `foo'. Stop.
check-defined-MY_FLAG special target
Personally I would use the simple and straightforward ...