Tutorial by Topics: ons

When we analyze the performance of the sorting algorithm, we interest primarily on the number of comparison and exchange. Average Exchange Let En be the total average number of exchange to sort array of N element. E1 = 0 (we do not need any exchange for array with one element). The average num...

AnnotationDetails@OneToOneSpecifies a one to one relationship with a corresponding object.@OneToManySpecifies a single object that maps to many objects.@ManyToOneSpecifies a collection of objects that map to a single object.@EntitySpecifies an object that maps to a database table.@TableSpecifies wh...

ser.read(size=1) ser.readline() ser.write() parameterdetailsportDevice name e.g. /dev/ttyUSB0 on GNU/Linux or COM3 on Windows.baudratebaudrate type: int default: 9600 standard values: 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 11520...

Regular expressions (also called "regex" or "regexp") define patterns that can be matched against a string. Type ?regex for the official R documentation and see the Regex Docs for more details. The most important 'gotcha' that will not be learned in the SO regex/topics is that mo...

PowerShell modules bring extendibility to the systems administrator, DBA, and developer. Whether it’s simply as a method to share functions and scripts. Powershell Functions are to avoid repitetive codes. Refer [PS Functions][1] [1]: PowerShell Functions PowerShell Scripts are used for automating...

The Codeigniter Sessions class uses browser cookies to save data that will persist across multiple page loads. Reference: https://codeigniter.com/user_guide/libraries/sessions.html

Aggregate functions in SQL Server run calculations on sets of values, returning a single value. AVG([ALL|DISTINCT]expression) COUNT([ALL|DISTINCT]expression) MAX([ALL|DISTINCT]expression) MIN([ALL|DISTINCT]expression) SUM([ALL|DISTINCT]expression)

The number of partitions is critical for an application's performance and/or successful termination. A Resilient Distributed Dataset (RDD) is Spark's main abstraction. An RDD is split into partitions, that means that a partition is a part of the dataset, a slice of it, or in other words, a chunk ...

Vararg Keyword: vararg is used in a method declaration to indicate that a variable number of parameters will be accepted. Spread Operator: An asterisk (*) before an array that is used in function calls to "unfold" the contents into individual parameters.

A Collection is a container object that is included in the VBA runtime. No additional references are required in order to use it. A Collection can be used to store items of any data type and allows retrieval by either the ordinal index of the item or by using an optional unique key. Feature C...

ParameterDetails$addFieldToFilter($field, $condition = null){ string } The field we are adding to the filter.$addFieldToFilter($field, $condition = null){ mixed } The definition of the filter we will use.addAttributeToFilter($attr, $condition = null, $join = 'inner'){ string } The field we are addi...

The SenderID that is present in the initialization example is a gcm sender id that is given to you by google. It should also be present when you install the plugin ionic plugin add phonegap-plugin-push --variable SENDER_ID="XXXXXXX" If you wish to add additional data to your push n...

In the modern web development it's common practice to use fonts to display icons. Since fonts are vectors, they are resolution independent and can be easily colored through CSS, just to name a few advantages compared to bitmap images etc. Ionicons was created by the same team that Ionic Framework ...

Tk is one of the most commonly used GUI toolkits for Perl. Other common toolkits are GTK+2 & 3, WxWidgets, and Win32 widgets. Less commonly used are Qt4, XUL, Prima, and FLTK. Tk, GTK+3, Wx, Win32, Prima, FLTK, and XUL are actively updated. Qt4 and GTK+2 are no longer developed actively, but ...

console.log([data][, ...]) console.error([data][, ...]) console.time(label) console.timeEnd(label)