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Reuse a parameter in String.format?
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From the docs:
The format specifiers for general, character, and numeric types have the following syntax:
%[argument_index$][flags][width][.precision]conversion
The optional argument_index is a decimal integ...
How can I initialise a static Map?
... Double brace initialization can cause memory leaks when used from a non-static context, because the anonymous class created will maintain a reference to the surrounding object. It has worse performance than regular initialization because of the additional class loading required. It can...
Rails hidden field undefined method 'merge' error
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By the way, I don't use hidden fields to send data from server to browser. Data attributes are awesome. You can do
<%= form_for @order, 'data-service' => 'test' do |f| %>
And then get attribute value with jquery
$('form').data('service')
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How to change MySQL data directory?
...SQL data directory to another path? Will I be able to access the databases from the old location?
20 Answers
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Python nested functions variable scoping [duplicate]
...pelling this is, but the issue is that b would otherwise be changing scope from "global" to "local" within the function. Not only does Python not seem to support this at a low level, but it would be confusing and unnecessary.
– sudo
Jul 11 '16 at 22:11
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Calculating Distance between two Latitude and Longitude GeoCoordinates
...PI;
dist = dist * 60 * 1.1515;
return unitOfLength.ConvertFromMiles(dist);
}
}
public class UnitOfLength
{
public static UnitOfLength Kilometers = new UnitOfLength(1.609344);
public static UnitOfLength NauticalMiles = new UnitOfLength(0.8684);
public static UnitOfLe...
Add icon to submit button in twitter bootstrap 2
... While this does apply the styling and looks great, it stops the form from being submitted when the user pressed enter in an input field. (Tested on FF17 only)
– Richard
Dec 5 '12 at 9:30
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CSS selector with period in ID
...sometimes authors just want to? Maybe in some cases it could be bleed over from the underlying implementation systems that might use periods in the server-side code's identifiers for form processing? I'm sure everyone that does has their own reasons; but there is no HTML/CSS reason to include them.
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jQuery.active function
...auses the $.ajaxStart() event to fire, the number of connections just went from 0 to 1 (jQuery.active++ isn't 0 after this one, and !0 == true), this means the first of the current simultaneous requests started. The same thing happens at the other end. When an AJAX request stops (because of a befo...
How to reorder data.table columns (without copying)
... c b a
# [1,] 0.2880365 3 1
# [2,] 0.7785115 2 2
# [3,] 0.3297416 1 3
From ?setcolorder:
In data.table parlance, all set* functions change their input by reference. That is, no copy is made at all, other than temporary working memory, which is as large as one column.
so should be pretty e...