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First install the .NET Core SDK by going through the installation instructions for the platform of your choice: Windows OSX Linux Docker After the installation has completed, open a command prompt, or terminal window. Create a new directory with mkdir hello_world and change into the ne...

The where statement may be used within a switch case match to add additional criteria required for a positive match. The following example checks not only for the range, but also if the number is odd or even: switch (temperature) { case 0...49 where temperature % 2 == 0: print(&quot...

A string representation of a Guid can be obtained by using the built in ToString method string myGuidString = myGuid.ToString(); Depending on your needs you can also format the Guid, by adding a format type argument to the ToString call. var guid = new Guid("7febf16f-651b-43b0-a5e3-0da8da4...

Google Apps Script does not require setup or installation. The only requirement is a Google Account. A Gmail account works as well as a Google Apps for Work/Education/Government account. You can create a new Google account by going to accounts.google.com Start your first script by going to script.g...

Classes can be created dynamically through the use of Class.new. # create a new class dynamically MyClass = Class.new # instantiate an object of type MyClass my_class = MyClass.new In the above example, a new class is created and assigned to the constant MyClass. This class can be instanti...

You can use an instance of an object to form your parameters public class SearchParameters { public string SearchString { get; set; } public int Page { get; set; } } var template= new SearchParameters { SearchString = "Dapper", Page = 1 }; var p = new DynamicParameters...

R is able to access the current date, time and time zone: Sys.Date() # Returns date as a Date object ## [1] "2016-07-21" Sys.time() # Returns date & time at current locale as a POSIXct object ## [1] "2016-07-21 10:04:39 CDT" as.numeric(Sys...

To format Dates we use the format(date, format="%Y-%m-%d") function with either the POSIXct (given from as.POSIXct()) or POSIXlt (given from as.POSIXlt()) d = as.Date("2016-07-21") # Current Date Time Stamp format(d,"%a") # Abbreviated Weekday ## [1] &qu...

# test date-time object options(digits.secs = 3) d = as.POSIXct("2016-08-30 14:18:30.58", tz = "UTC") format(d,"%S") # 00-61 Second as integer ## [1] "30" format(d,"%OS") # 00-60.99… Second as fractional ## [1] "30.579" for...

The functions for parsing a string into POSIXct and POSIXlt take similar parameters and return a similar-looking result, but there are differences in how that date-time is stored; see "Remarks." as.POSIXct("11:38", # time string format = "...

To insert multiple rows of data in SQL Server 2008 or later: INSERT INTO USERS VALUES (2, 'Michael', 'Blythe'), (3, 'Linda', 'Mitchell'), (4, 'Jillian', 'Carson'), (5, 'Garrett', 'Vargas'); To insert multiple rows of data in earlier versions of SQL Server, use "UNION ALL" like so: ...

A single row of data can be inserted in two ways: INSERT INTO USERS(Id, FirstName, LastName) VALUES (1, 'Mike', 'Jones'); Or INSERT INTO USERS VALUES (1, 'Mike', 'Jones'); Note that the second insert statement only allows the values in exactly the same order as the table columns whereas in...

The Pipe Operator |> takes the result of an expression on the left and feeds it as the first parameter to a function on the right. expression |> function Use the Pipe Operator to chain expressions together and to visually document the flow of a series of functions. Consider the following:...

Approximate-number data types for use with floating point numeric data. SELECT CAST( PI() AS FLOAT) --returns 3.14159265358979 SELECT CAST( PI() AS REAL) --returns 3.141593

NSArray *myColors = [NSArray arrayWithObjects: @"Red", @"Green", @"Blue", @"Yellow", nil]; // Convert myColors to mutable NSMutableArray *myColorsMutable = [myColors mutableCopy];

See Boost Getting Started. Most of the Boost libraries are header-only, meaning that there's nothing you have to compile or link to. Make sure you are getting the most recent version of Boost: Visit www.boost.org Look for the Current Release download. Currently, this links here. Select the ...

Installing mongoose is as easy as running the npm command npm install mongoose --save But make sure you have also installed MongoDB for your OS or Have access to a MongoDB database. Connecting to MongoDB database: 1. Import mongoose into the app: import mongoose from 'mongoose'; 2. Specify...

C++11 One of constraining function is to use trailing decltype to specify the return type: namespace details { using std::to_string; // this one is constrained on being able to call to_string(T) template <class T> auto convert_to_string(T const& val, int ) ->...

SFINAE stands for Substitution Failure Is Not An Error. Ill-formed code that results from substituting types (or values) to instantiate a function template or a class template is not a hard compile error, it is only treated as a deduction failure. Deduction failures on instantiating function templa...

The -Regex parameter allows switch statements to perform regular expression matching against conditions. Example: switch -Regex ('Condition') { 'Con\D+ion' {'One or more non-digits'} 'Conditio*$' {'Zero or more "o"'} 'C.ndition' {'Any single char.'} '^C\w+ition$'...