Tutorial by Topics: es

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 ...

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...

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 ...

Reading Text files and performing operations on them.

git subtree add -P <prefix> <commit> git subtree add -P <prefix> <repository> <ref> git subtree pull -P <prefix> <repository> <ref> git subtree push -P <prefix> <repository> <ref> git subtree merge -P <prefix> <commit&g...

render_template(template_name_or_list, **context)

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

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

Design patterns are a good way to keep your code readable and DRY. DRY stands for don't repeat yourself. Below you could find more examples about the most important design patterns. In software engineering, a software design pattern is a general reusable solution to a commonly occurring proble...

Android has a dedicated XML namespace intended for tools to be able to record information in XML file. The namespace URI is : http://schemas.android.com/tools and is usually bound to the tools: prefix.

Parallelization on remote machines require libraries to be downloaded on each machine. Prefer package::function() calls. Several packages have parallelization natively built-in, including caret, pls and plyr. Microsoft R Open (Revolution R) also uses multi-threaded BLAS/LAPACK libraries which int...

Regular Expressions (sometimes called regexs or regexps) are a textual syntax which represents the patterns which can be matched in the strings operated upon. Regular Expressions, introduced in c++11, may optionally support a return array of matched strings or another textual syntax defining how to...

This topic provides examples for unit testing the various constructs in AngularJS. Unit tests are often written using using Jasmine, a popular behavior driven testing framework. When unit testing angular constructs, you will need to include ngMock as a dependency when running the unit tests.