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Using Vim's tabs like buffers
...im -p however be aware that only up to 10 tabs will be display by default. Extra files are loaded into buffers, but not displayed in their own tab.
– IanB
Oct 22 '14 at 23:37
...
Why do some C# lambda expressions compile to static methods?
...ikely because there are no closures, for example:
int age = 25;
Action<string> withClosure = s => Console.WriteLine("My name is {0} and I am {1} years old", s, age);
Action<string> withoutClosure = s => Console.WriteLine("My name is {0}", s);
Console.WriteLine(withClosure.Method.I...
How to find where a method is defined at runtime?
...ou're on Ruby 1.9+, you can use source_location
require 'csv'
p CSV.new('string').method(:flock)
# => #<Method: CSV#flock>
CSV.new('string').method(:flock).source_location
# => ["/path/to/ruby/1.9.2-p290/lib/ruby/1.9.1/forwardable.rb", 180]
Note that this won't work on everything, l...
Why are only final variables accessible in anonymous class?
...c final int a = 3;
or as a local variable, like
public static void main(String[] args)
{
final int a = 3;
If you want to access and modify a variable from an anonymous class, you might want to make the variable a class-level variable in the enclosing class.
public class Test
{
public int a;
...
Threading in a PyQt application: Use Qt threads or Python threads?
... (although the caveat above still applies.)
Non-blocking I/O
Threads add extraordinarily complexity to your application. Especially when dealing with the already complex interaction between the Python interpreter and compiled module code. While many find event-based programming difficult to follow...
How do I bind a WPF DataGrid to a variable number of columns?
... {
Header = column.Name,
Binding = new Binding(string.Format("[{0}]", index++))
});
}
}
// E.g. myGrid.GenerateColumns(schema);
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How do MySQL indexes work?
...lision number is high cause you'll only perform the second comparison (the string one) against the repeated hashes.
Unfortunately, using this technique, you still need to hit the table to compare the url field.
Wrap up
Some facts that you may consider every time you want to talk about optimizatio...
Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?
...b (In MySQL 5.6.4 and up) and Myisam Engines
You can only use FULLTEXT on CHAR, VARCHAR and TEXT column types
FULLTEXT index involves a LOT more than just creating an index. There's a bunch of system tables created, a completely separate caching system and some specific rules and optimizations app...
How to enumerate an object's properties in Python?
... in Python), use
my_dict.keys()
my_dict = {'abc': {}, 'def': 12, 'ghi': 'string' }
my_dict.keys()
> ['abc', 'def', 'ghi']
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Plot two graphs in same plot in R
...es(y=y2), colour="green") # second layer
Here + operator is used to add extra layers to basic object.
With ggplot you have access to graphical object on every stage of plotting. Say, usual step-by-step setup can look like this:
g <- ggplot(df, aes(x))
g <- g + geom_line(aes(y=y1), colour=...