Tutorial by Examples: all

To install and load the current stable version of ggplot2 for your R installation use: # install from CRAN install.packages("ggplot2") To install the development version from github use # install.packages("devtools") devtools::install_github("hadley/ggplot2") ...

Detailed instructions on excel-formula(s). There are many formulas that you can choose from. They are divided up into 7 different categories and are on the FORMULAS tab in Excel. The categories are: Financial Logical Text Date & Time Lookup & Reference Math & trig More Function...

You can install Sinatra as a global gem: gem install sinatra or add it to a project's Gemfile # in Gemfile: gem 'sinatra' and run bundle install.

@parallel can be used to parallellize a loop, dividing steps of the loop up over different workers. As a very simple example: addprocs(3) a = collect(1:10) for idx = 1:10 println(a[idx]) end For a slightly more complex example, consider: @time begin @sync begin @paral...

The Julia documentation advises that pmap() is designed for the case where each function call does a large amount of work. In contrast, @parallel for can handle situations where each iteration is tiny, perhaps merely summing two numbers. There are several reasons for this. First, pmap incurs ...

SELECT s.name AS [schema], t.object_id AS [table_object_id], t.name AS [table_name], c.column_id, c.name AS [column_name], i.name AS [index_name], i.type_desc AS [index_type] FROM sys.schemas AS s INNER JOIN sys.tables AS t ON s.schema_id = t.schema_id I...

An object can only be deallocated by delete if it was allocated by new and is not an array. If the argument to delete was not returned by new or is an array, the behavior is undefined. An object can only be deallocated by delete[] if it was allocated by new and is an array. If the argument to delet...

If you like to organize your project by keeping source files in different subdirectories, you should know that during a build qmake will not preserve this directory structure and it will keep all the ".o" files in a single build directory. This can be a problem if you had conflicting file ...

Download installation files from Phalcon dedicated download page, as well as finding manuals on making Phalcon work with popular platforms. Windows Put the actual DLL files in a directory proper to extend PHP functionality. For XAMPP use xampp\php\ext\ - and for WAMP use wamp\bin\php\php*\ext\ de...

Steps to Reproduce (Turbo Forms, CRM 2015.1, --> CRM 2016.2) Form (with or without other required fields) has one field that is empty and required. Lose focus on the empty field ("title" in this example), this triggers the Field Notification Icon: Wire up onChange Handler for emp...

pcall stands for "protected call". It is used to add error handling to functions. pcall works similar as try-catch in other languages. The advantage of pcall is that the whole execution of the script is not being interrupted if errors occur in functions called with pcall. If an error insid...

Detailed instructions on getting concurrency set up or installed.

Basic error handling should be added to all procedures in production code, since otherwise an unexpected error will cause Access to crash or invite the end-user to enter debug mode. A typical pattern for a basic error handler that traps all errors is: Sub Name() On Error GoTo errHandler '[some...

Normal mode Ctrl-wo Ex mode :only or short :on

When rendering a form 'by hand', it can be useful to know if there are fields left to render or not. The function isRendered() from the FormView class returns true if there are still fields left to be rendered to the template. This snippet prints <h3>Extra fields</h3> if there are fiel...

Getting zsh zsh is available on many UNIX-like platforms via their built-in package management systems. On the Debian and Ubuntu Linux distributions, zsh is available in the default package repositories and can be installed using: $ sudo apt-get install zsh # or, on newer Ubuntu distributions $ ...

module.exports.routes = { // This function will be executed for all http verbs on all urls 'all /*', function (req, res, next) { // Expose the function `fooBar` to all views (via the locals object) res.locals.fooBar = function (arg1) { return 'foobar' + arg1; }; }, };...

Consider using Extension Methods as Functions which wrap other code, here's a great example that uses both a static method and and extension method to wrap the Try Catch construct. Make your code Bullet Proof... using System; using System.Diagnostics; namespace Samples { /// <summary&g...

C.I.A.s are intended as a simple way of getting attributes from whatever is calling the targeted method. There is really only 1 way to use them and there are only 3 attributes. Example: //This is the "calling method": the method that is calling the target method public void doProcess() ...

Detailed instructions on getting reflection set up or installed.