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How do I create directory if none exists using File class in Ruby?
...se FileUtils to recursively create parent directories, if they are not already present:
require 'fileutils'
dirname = File.dirname(some_path)
unless File.directory?(dirname)
FileUtils.mkdir_p(dirname)
end
Edit: Here is a solution using the core libraries only (reimplementing the wheel, not rec...
Numpy: Get random set of rows from 2D array
...
DanielDaniel
16.1k77 gold badges4747 silver badges7070 bronze badges
4
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Two way/reverse map [duplicate]
...
You can create your own dictionary type by subclassing dict and adding the logic that you want. Here's a basic example:
class TwoWayDict(dict):
def __setitem__(self, key, value):
# Remove any previous connections with these values
if key in self:
del self[...
What do the following phrases mean in C++: zero-, default- and value-initialization?
...be the only difference that's more than a clarification). See Kirill V. Lyadvinsky's answer for the definitions straight from the standard.
See this previous answer about the behavior of operator new for details on the the different behavior of these type of initialization and when they kick in (a...
Create web service proxy in Visual Studio from a WSDL file
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edited Feb 6 at 10:46
Madis Otenurm
4555 bronze badges
answered Nov 29 '10 at 13:48
Andrew MAndrew M
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Calculate the date yesterday in JavaScript
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James KyburzJames Kyburz
11k11 gold badge2828 silver badges3131 bronze badges
12
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How exactly to use Notification.Builder
...to use the old API.
Update: the NotificationCompat.Builder class has been added to the Support Package so we can use this to support API level v4 and up:
http://developer.android.com/reference/android/support/v4/app/NotificationCompat.Builder.html
...
How to make link look like a button?
...ock;
width: 115px;
height: 25px;
background: #4E9CAF;
padding: 10px;
text-align: center;
border-radius: 5px;
color: white;
font-weight: bold;
line-height: 25px;
}
<a class="button">Add Problem</a>
http://jsfiddle.net/GCwQu/
...
Insert auto increment primary key to existing table
... a table which has no primary key nor auto_increment column. I know how to add an primary key column but I was wondering if it's possible to insert data into the primary key column automatically (I already have 500 rows in DB and want to give them id but I don't want to do it manually). Any thoughts...
MVC (Laravel) where to add logic
... very useful as long as you follow the SOLID principles.
For the where to add logic I think that it's important to refer to the Single Responsibility Principle. Also, my answer considers that you are working on a medium / large project. If it's a throw-something-on-a-page project, forget this answe...