Tutorial by Topics: s

Extension methods are methods (Sub or Function) that add functionality to a Type (which may be a Reference Type or a Value Type). These Types may or may not be owned by you. They may or may not be in the same assembly as the Type they are intended to modify. You can allow an opt-in to your exte...

Element and attribute names in XML are called QNames (qualified names). A QName is made of: a namespace (a URI) a prefix (an NCName, NC because it contains no colon) a local name (an NCName) Only the namespace and the local name are relevant for comparing two QNames. The prefix is only a ...

This section provides an overview of what linq-to-sql is, and why a developer might want to use it. It should also mention any large subjects within linq-to-sql, and link out to the related topics. Since the Documentation for linq-to-sql is new, you may need to create initial versions of those r...

DataFrame is a data structure provided by pandas library,apart from Series & Panel. It is a 2-dimensional structure & can be compared to a table of rows and columns. Each row can be identified by an integer index (0..N) or a label explicitly set when creating a DataFrame object. Each colu...

iOS notifications are a simple and powerful way to send data in a loosely coupled way. That is, the sender of a notification doesn't have to care about who (if anyone) receives the notification, it just posts it out there to the rest of the app and it could be picked up by lots of things or nothing ...

A great deal of regex engines use a "multi-line" mode in order to search several lines in a file independently. Therefore when using $, these engines will match all lines' endings. However, engines that do not use this kind of multi-line mode will only match the last position of the st...

ModeExplaination>Write (trunc). Will overwrite existing files. Creates a new file if no file was found>>Write (append). Will not overwrite files but append new content at the end of it. Will also create a file if used for opening a non existing file.<Read. Opens the file in read only m...

Subqueries can appear in different clauses of an outer query, or in the set operation. They must be enclosed in parentheses (). If the result of the subquery is compared to something else, the number of columns must match. Table aliases are required for subqueries in the FROM clause to name th...

[head | tail] = [1, 2, 3, true] # one can use pattern matching to break up cons cells. This assigns head to 1 and tail to [2, 3, true] %{d: val} = %{d: 1, e: true} # this assigns val to 1; no variable d is created because the d on the lhs is really just a symbol that is used to create the p...

Express.js is, in the words of the developers, a "fast, unopinionated, minimalist web framework for Node.js." Designed to be minimal and flexible, Express offers a set of features for creating web and mobile applications. From HTTP methods to built-in middleware, Express is designed to ...

This section provides an overview of what mapbox is, and why a developer might want to use it. It should also mention any large subjects within mapbox, and link out to the related topics. Since the Documentation for mapbox is new, you may need to create initial versions of those related topics. ...

Backbone is a simple but robust client-side JavaScript library for building applications. Data is represented as Models, which can be gathered into Collections. Model state is displayed with Views. Backbone attempts to provide the minimal set of data structure and user interface primitives that w...

Reading Text files and performing operations on them.