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MVC Vs n-tier architecture
...ich is an architectural pattern) and an n-tier architecture for an application. I searched for it but couldn't find a simple explanation. May be I am a bit naive on MVC concepts, so if anyone can explain the difference then it would be great.
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Elegant way to check for missing packages and install them?
... @psql , Shine is right, since ">0" is "implicit" within the if condition. run this for to verify it: new.packages <- c(1,2) length(new.packages) if(length(new.packages)){print("hello!")}else{print("oh no!")}
– Andrea Cirillo
Jan 22 '16 at 7:57
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How to reset Jenkins security settings from the command line?
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The simplest solution is to completely disable security - change true to false in /var/lib/jenkins/config.xml file.
<useSecurity>true</useSecurity>
Then just restart Jenkins, by
sudo service jenkins restart
And then go to adm...
How to call a Python function from Node.js
I have an Express Node.js application, but I also have a machine learning algorithm to use in Python. Is there a way I can call Python functions from my Node.js application to make use of the power of machine learning libraries?
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How to detect current state within directive
...is();
You can use it like so:
$state.is('stateName');
Per the documentation:
$state.is ... similar to $state.includes, but only checks for the full state name.
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How do you connect to multiple MySQL databases on a single webpage?
I have information spread out across a few databases and want to put all the information onto one webpage using PHP. I was wondering how I can connect to multiple databases on a single PHP webpage.
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html5 - canvas element - Multiple layers
Without any extension library, is it possible to have multiple layers in the same canvas element?
7 Answers
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Objective-C: difference between id and void *
...erence to some random Objective-C object of unknown class"
There are additional semantic differences:
Under GC Only or GC Supported modes, the compiler will emit write barriers for references of type id, but not for type void *. When declaring structures, this can be a critical difference. De...
Set custom HTML5 required field validation message
I have one form with many input fields. I have put html5 validations
11 Answers
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How do I define and use an ENUM in Objective-C?
I declared an enum in my implementation file as shown below, and declared a variable of that type in my interface as PlayerState thePlayerState; and used the variable in my methods. But I am getting errors stating that it is undeclared. How do I correctly declare and use a variable of type PlayerSta...