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When to use symbols instead of strings in Ruby?
...fiers. For Ruby < 2.2 only use symbols when they aren't generated dynamically, to avoid memory leaks.
Full answer
The only reason not to use them for identifiers that are generated dynamically is because of memory concerns.
This question is very common because many programming languages don't ...
android TextView: setting the background color dynamically doesn't work
Setting the background color programatically of an android TextView doesn't seem to work.
I'm I missing something!
14 Ans...
Python: fastest way to create a list of n lists
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@Paul: That would be way slower again due to the function call overhead of the lambda expression.
– Sven Marnach
Apr 1 '11 at 22:06
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Entity Framework. Delete all rows in table
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The amount of data is small or
The performance doesn't matter
Simply call:
VotingContext.Votes.RemoveRange(VotingContext.Votes);
Assuming this context:
public class VotingContext : DbContext
{
public DbSet<Vote> Votes{get;set;}
public DbSet<Poll> Polls{get;set;}
p...
What are the differences between various threading synchronization options in C#?
...is generally preferred over mutexes, because monitors were designed specifically for the .NET Framework and therefore make better use of resources.
Using a lock or monitor is useful for preventing the simultaneous execution of thread-sensitive blocks of code, but these constructs do not allow one ...
How do I pass a variable by reference?
...do_with_the_old_string(the_string)
return new_string
# then you could call it like
my_string = return_a_whole_new_string(my_string)
If you really wanted to avoid using a return value, you could create a class to hold your value and pass it into the function or use an existing class, like a li...
Create module variables in Ruby
...s of modules, and class variables are definable on modules. They should be called module variables.
– sawa
Apr 17 '11 at 2:54
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How to sort in mongoose?
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I've got a all() must be used after where() when called with these arguments in Mongoose 4.6.5...
– Dam Fa
Jan 24 '17 at 23:56
add a comment
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.htaccess: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included i
I have this error when trying to browse php files locally
8 Answers
8
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Why do loggers recommend using a logger per class?
...Logger.DebugFormat("File not found: {0}", _filename); // Logger determines caller
-- or --
Logger.DebugFormat(this, "File not found: {0}", _filename); // Pass in the caller
Using the second example, the Logger would need to build a stack trace to see who was calling it or your code would always ...