Tutorial by Topics: h

The special symbol .SD is available in j of DT[i,j,by], capturing the Subset of Data for each by group surviving the filter, i. .SDcols is a helper. Type ?`special-symbols` for the official docs. A reminder: DT[where, select|update|do, by] syntax is used to work with columns of a data.table. T...

$ shopt -u option # Deactivate Bash's built-in 'option' $ shopt -s option # Activate Bash's built-in 'option' Character Classes Valid character classes for the [] glob are defined by the POSIX standard: alnum alpha ascii blank cntrl digit graph lower print punct space upper word xdig...

Entity Framework (EF) Core is a lightweight and extensible version of the popular Entity Framework data access technology. EF Core is an object-relational mapper (O/RM) that enables .NET developers to work with a database using .NET objects. It eliminates the need for most of the data-access code...

VHDL is a compound acronym for VHSIC (Very High Speed Integrated Circuit) HDL (Hardware Description Language). As a Hardware Description Language, it is primarily used to describe or model circuits. VHDL is an ideal language for describing circuits since it offers language constructs that easily d...

When you make any changes to the classes then you need to run a dev/build?flush=1 to rebuild the manifest.

To run any of these examples just call them like that: static void Main() { new Program().ProcessDataAsync(); Console.ReadLine(); }

The ^M character stands for a carriage return in Vim (<c-m> or just <CR>). Vim displays this character when at least on line in the file uses LF line endings. In other words, when Vim consider a file to have fileformat=unix but some lines do have carriage returns (CR), the carriage r...

NetSuite is a cloud-based ERP, CRM, E-Commerce, and Professional Services management platform. It is used by over 30,000 companies to run their entire business. NetSuite is fully customizable by administrators and developers, including via a JavaScript-based API called SuiteScript. Developers are...

Wicket is a component-based framework, which puts it in stark contrast to some of the earlier solutions to the sometimes monotonous task of web programming. Like other frameworks, Wicket builds on top of Sun's servlet API. However, unlike frameworks like Struts or Spring MVC, the developer using ...

A good explanation of HDFS and how it works. Syntax should contain the commands which maybe use in HDFS.

+x -x a + b a - b a * b a / b a ^ b a % b 4a sqrt(a)

Examples to get you up and running quickly (and correctly) with ASP.NET WebAPI