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How do I close all open tabs at once?
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Shortest/simplest/fastest way would be:
:qa
To save work in all tabs and quit:
:wqa
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Where does Scala look for implicits?
...bout the latter type, if one calls a method m on an object o of a class C, and that class does not support method m, then Scala will look for an implicit conversion from C to something that does support m. A simple example would be the method map on String:
"abc".map(_.toInt)
String does not supp...
TFS: Updating branch with changes from main
So, we have our main dev line, I create a branch, and developer b creates a branch. We both do some work. developer b finishes his work, merges back into the main dev line. I know his changes will affect me, and rather than deal with the conflicts later, I would like to update my branch, with the...
jQuery Ajax POST example with PHP
.../ setup some local variables
var $form = $(this);
// Let's select and cache all the fields
var $inputs = $form.find("input, select, button, textarea");
// Serialize the data in the form
var serializedData = $form.serialize();
// Let's disable the inputs for the duration of...
What's the role of GetHashCode in the IEqualityComparer in .NET?
I'm trying to understand the role of the GetHashCode method of the interface IEqualityComparer.
3 Answers
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Is it possible to add an HTML link in the body of a MAILTO link [duplicate]
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Safari on iOS renders tags such as <b>, <i>, and <img>. Not sure about <a>.
– Andrew Ferrier
May 17 '12 at 14:39
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Implement Stack using Two Queues
...eue1 is bigger than 1, pipe dequeued items from queue1 into queue2
dequeue and return the last item of queue1, then switch the names of queue1 and queue2
Version B (efficient pop):
push:
enqueue in queue2
enqueue all items of queue1 in queue2, then switch the names of queue1 and queue2
pop:
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how do I make a single legend for many subplots with matplotlib?
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There is also a nice function get_legend_handles_labels() you can call on the last axis (if you iterate over them) that would collect everything you need from label= arguments:
handles, labels = ax.get_legend_handles_labels()
fig.legend(handles, labels, loc='upper c...
SQL/mysql - Select distinct/UNIQUE but return all columns?
... MySQL, if that's what you're using.)
You could fetch the distinct fields and stick to picking a single arbitrary row each time.
On some platforms (e.g. PostgreSQL, Oracle, T-SQL) this can be done directly using window functions:
select *
from (
select *,
row_number() over (partition...
What do helper and helper_method do?
... This is used for any method that you need to access from both controllers and helpers/views (standard helper methods are not available in controllers). e.g. common use case:
#application_controller.rb
def current_user
@current_user ||= User.find_by_id!(session[:user_id])
end
helper_method :curre...