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Referring to the null object in Python
...singleton None.
The best way to check things for "Noneness" is to use the identity operator, is:
if foo is None:
...
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Removing array item by value
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@srcspider why not? $referenced = array_diff($referenced, $items_to_remove);
– Alejandro García Iglesias
Aug 22 '13 at 0:09
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How to convert SSH keypairs generated using PuTTYgen (Windows) into key-pairs used by ssh-agent and
...Export OpenSSH and export your private key
Copy your private key to ~/.ssh/id_dsa (or id_rsa).
Create the RFC 4716 version of the public key using ssh-keygen
ssh-keygen -e -f ~/.ssh/id_dsa > ~/.ssh/id_dsa_com.pub
Convert the RFC 4716 version of the public key to the OpenSSH format:
ssh-keygen ...
How to configure multi-module Maven + Sonar + JaCoCo to give merged coverage report?
...r docs refer to a GitHub project with examples that are helpful. What I did to solve this was to apply the integration tests logic to regular unit tests (although proper unit tests should be submodule specific, this isn't always the case).
In the parent pom.xml, add these properties:
<propert...
Shiro vs. SpringSecurity [closed]
...ing app, you'll have a well-rounded security experience.
For example, consider the Spring XML config example in another post in this thread. Here's how you'd do (essentially) the same thing in Shiro:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/sche...
Cannot push to Heroku because key fingerprint
...thout success :-((
Finally, I found the solution:
I had to add my new rsa identity in my machine!
So, first of all I created a new rsa key:
ssh-keygen -t rsa -C "giordano.scalzo[at]gmail.com" -f ~/.ssh/id_rsa_heroku
then added it to my machine
ssh-add ~/.ssh/id_rsa_heroku
and, finally, to H...
Android ListView Divider
...ou should use 1px instead of 1dp or 1dip: if you specify 1dp or 1dip, Android will scale that down. On a 120dpi device, that becomes something like 0.75px translated, which rounds to 0. On some devices, that translates to 2-3 pixels, and it usually looks ugly or sloppy
For dividers, 1px is the corr...
How do I use Maven through a proxy?
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For details of setting up a proxy for Maven, see the mini guide.
Essentially you need to ensure the proxies section in either the global settings ([maven install]/conf/settings.xml), or user settings (${user.home}/.m2/settings.xml) is configured correctly. It is better to do this in ...
Programmatically set the initial view controller using Storyboards
...ial view controller
Ensure all initial view controllers have a Storyboard ID.
In the storyboard, uncheck the "Is initial View Controller" attribute from the first view controller.
If you run your app at this point you'll read:
Failed to instantiate the default view controller for UIMainStoryboar...
Can I use Objective-C blocks as properties?
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@property (nonatomic, copy) void (^simpleBlock)(void);
@property (nonatomic, copy) BOOL (^blockWithParamter)(NSString *input);
If you are going to be repeating the same block in several places use a type def
typedef void(^MyCompletionBlock)(BOOL succes...