Tutorial by Topics: pi

The Facebook Graph API is one of the most useful tools available to app developers today. It is used to integrate Facebook functionality such as login or retrieving photos, friends and other data one might need from Facebook into one's own app.
heroku pipelines:<install|create|promote>... A pipeline is a group of Heroku apps that share the same codebase. Apps in a pipeline are grouped into “review”, “development”, “staging”, and “production” stages representing different deployment steps in a continuous delivery workflow. ...
Bluetooth Classic is available from Android 2.0 (API level 5) and above. Bluetooth LE is available from Android 4.3 (API level 18) and above.
Meteor.wrapAsync(func, [context]) ParametersDetailsfunc: FunctionAn asynchronous/synchronous function to be wrapped in a Fiber that takes a callback w/ parameters (error, result).context: Any (optional)A data context in which the function gets executed upon. An asynchronously wrapped funct...
pickle.dump(object,file,protocol) #To serialize an object pickle.load(file) #To de-serialize an object pickle.dumps(object, protocol) # To serialize an object to bytes pickle.loads(buffer) # To de-serialzie an object from bytes ParameterDetailsobjectThe object which is to ...
FooModel.objects.filter(field_name__key_name='value to query')
Selection sel = window.getSelection(); Selection sel = document.getSelection(); // equivalent to the above Range range = document.createRange(); range.setStart(startNode, startOffset); range.setEnd(endNode, endOffset); ParameterDetailsstartOffsetIf the node is a Text node, it is the numb...
MPI is a standard, not a programming library. There are many implementations of the standard. The most common open source ones are MPICH and Open MPI. There are many derivatives of these two libraries that are either open source or commercial (or both). It's important to know which implementation...
ParameterDetails-n <num_procs>The number of MPI processes to start up for the job
Scraping refers to using a computer to retrieve the code of a webpage. Once the code is obtained, it must be parsed into a useful form for further use in R. Base R does not have many of the tools required for these processes, so scraping and parsing are typically done with packages. Some packages...
In R, tabular data is stored in data frames. This topic covers the various ways of transforming a single table. Helpful packages Reshaping, stacking and splitting with data.table Reshape using tidyr splitstackshape
UIImagePickerController provides an almost out of the box solution to allow the user to select an image from their device or take a picture with the camera and then present that image. By conforming to the UIImagePickerControllerDelegate, you can create logic that specifies in your app how to presen...
Pivot query creation in MySQL relies upon the GROUP_CONCAT() function. If the result of the expression that creates the columns of the pivot query is expected to be large, the value of the group_concat_max_len variable must be increased: set session group_concat_max_len = 1024 * 1024; -- This sho...
session$sendCustomMessage(name,list of parameters) Shiny.addCustomMessageHandler(name, JS function that accepts list of parameters) Shiny.onInputChange(name,value)

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