Knockout.js overview

Knockout.js javascript library helps to build dynamic, data-centric user interfaces.

Foundation for the Knockout.js library

• MVVM --> The Model-View-ViewModel design pattern, 
• Observables, and 
• Bindings

Observables
- Knockout.js uses observables to expose & track a ViewModel’s properties

• Computed Observables
• helps to create properties that are dynamically generated.
• Observable Arrays
• helps native Javascript Arrays with power of Knockout.js observables

 Bindings
- Helps to connect a user interface HTMLcomponent in the view to a particular observable.

Begin learning about Knockout.js from this Step-by-Step link
- http://learn.knockoutjs.com/#/?tutorial=intro
- http://knockoutjs.com/

MapReduce Design Patterns

• Summarization patterns: get a top-level view by summarizing and grouping data
• Filtering patterns: view data subsets such as records generated from one user
• Data organization patterns: reorganize data to work with other systems, or to make MapReduce analysis easier
• Join patterns: analyze different datasets together to discover interesting relationships
• Metapatterns: piece together several patterns to solve multi-stage problems, or to perform several analytics in the same job
• Input and output patterns: customize the way you use Hadoop to load or store data