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Visual Basic 14 is the version of Visual Basic that was shipped as part of Visual Studio 2015. This version was rewritten from scratch in about 1.3 million lines of VB. Many features were added to remove common irritations and to make common coding patterns cleaner. The version number of Visual Ba...

NSDate() // NSDate object init to the current date and time NSDate().timeIntervalSince1970 // Current date and time in number of seconds from 00:00:00 UTC on 1 January 1970. NSDate().compare(other: NSDate) // Returns a comparison of current date to another date returns a NSComparisonResult ...

These classes are reference libraries of methods and properties that do not change state, in one word, immutable. You don't need to create them, you simply use them. Classes and methods such as these are called static classes because they are not created, destroyed, or changed.You can refer to a sta...

Random number generation in C++ is provided by the <random> header. This header defines random devices, pseudo-random generators and distributions. Random devices return random numbers provided by operating system. They should either be used for initialization of pseudo-random generators or...

Log.v(String tag, String msg, Throwable tr) Log.v(String tag, String msg) Log.d(String tag, String msg, Throwable tr) Log.d(String tag, String msg) Log.i(String tag, String msg, Throwable tr) Log.i(String tag, String msg) Log.w(String tag, String msg, Throwable tr) Log.w(String tag, String...

A set is a collection of items which can be anything. Whatever operator we need to work on these sets are in short the set operators and the operation is also known as set operation. Basic set operation includes Union, Intersection as well as addition, subtraction, etc. Group-Object Gr...

ParameterDescriptionpath_or_bufstring or file handle, default None File path or object, if None is provided the result is returned as a string.sepcharacter, default ‘,’ Field delimiter for the output file.na_repstring, default ‘’ Missing data representationfloat_formatstring, default None Format st...

Localization is feature provided by iOS which translates your app into multiple language.For Localisation,Internationalization is necessary.Internationalization is process of making iOS app able to adapt different culture,language and regions.

To select rows with out duplicates change the WHERE clause to "RowCnt = 1" To select one row from each set use Rank() instead of Sum() and change the outer WHERE clause to select rows with Rank() = 1

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 ...

[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...