Tutorial by Examples: l

Linux (Ubuntu) Installation Lucee (Open Source) ColdFusion / CFML Interpretor Download the appropriate file from their site (http://lucee.org/downloads.html) and execute their installer wget http://cdn.lucee.org/downloader.cfm/id/155/file/lucee-5.0.0.252-pl0-linux-x64-installer.run sudo chmod ...
MATLAB comes with many built-in scripts and functions which range from simple multiplication to image recognition toolboxes. In order to get information about a function you want to use type: help functionname in the command line. Lets take the help function as an example. Information on how to use...
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Elements of the same class can often be concatenated into arrays (with a few rare exceptions, e.g. function handles). Numeric scalars, by default of class double, can be stored in a matrix. >> A = [1, -2, 3.14, 4/5, 5^6; pi, inf, 7/0, nan, log(0)] A = 1.0e+04 * 0.0001 -0.0002 0...
Detailed instructions on getting android-layout set up or installed.
The for and while compound statements (loops) can optionally have an else clause (in practice, this usage is fairly rare). The else clause only executes after a for loop terminates by iterating to completion, or after a while loop terminates by its conditional expression becoming false. for i in r...
PHP represents "no value" with the null keyword. It's somewhat similar to the null pointer in C-language and to the NULL value in SQL. Setting the variable to null: $nullvar = null; // directly function doSomething() {} // this function does not return anything $nullvar = doSomething...
In this example, we will look at a method for returning the last non-empty row in a column for a data set. This method will work regardless of empty regions within the data set. However caution should be used if merged cells are involved, as the End method will be "stopped" against a mer...
Any Fortran program has to include end as last statement. Therefore, the simplest Fortran program looks like this: end Here are some examples of "hello, world" programs: print *, "Hello, world" end With write statement: write(*,*) "Hello, world" end For c...
For apt-get based systems such as Ubuntu Add the Jenkins repository: wget -q -O - https://jenkins-ci.org/debian/ Jenkins-ci.org.key | sudo apt-key sudo sh -c 'echo deb http://pkg.jenkins-ci.org/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list' Update sources and install Jenk...
The double-negation !! is not a distinct JavaScript operator nor a special syntax but rather just a sequence of two negations. It is used to convert the value of any type to its appropriate true or false Boolean value depending on whether it is truthy or falsy. !!1 // true !!0 ...
Another neat feature using slices is slice assignment. Python allows you to assign new slices to replace old slices of a list in a single operation. This means that if you have a list, you can replace multiple members in a single assignment: lst = [1, 2, 3] lst[1:3] = [4, 5] print(lst) # Out: [1...
Detailed instructions on getting Nativescript set up or installed. The following examples show the required steps to set up a Windows or OSX system and then sign post to troubleshooting guides in case you have any trouble. In addition, there are examples of how to set up recommended workflows, IDE...
Dart has If Else: if (year >= 2001) { print('21st century'); } else if (year >= 1901) { print('20th century'); } else { print('We Must Go Back!'); } Dart also has a ternary if operator: var foo = true; print(foo ? 'Foo' : 'Bar'); // Displays "Foo".
While loops and do while loops are allowed in Dart: while(peopleAreClapping()) { playSongs(); } and: do { processRequest(); } while(stillRunning()); Loops can be terminated using a break: while (true) { if (shutDownRequested()) break; processIncomingRequests(); } You can s...
Two types of for loops are allowed: for (int month = 1; month <= 12; month++) { print(month); } and: for (var object in flybyObjects) { print(object); } The for-in loop is convenient when simply iterating over an Iterable collection. There is also a forEach method that you can cal...
Prerequisites: NodeJS and npm There are two ways of installing Webpack: globally or per-project. It is best to have the dependency installed per-project, as this will allow you to use different versions of webpack for each project and don't require user to have installed webpack globally. Install...
A Pseudo Distributed Cluster Setup Procedure Prerequisites Install JDK1.7 and set JAVA_HOME environment variable. Create a new user as "hadoop". useradd hadoop Setup password-less SSH login to its own account su - hadoop ssh-keygen << Press ENTER for all prompt...
x = (1, 2, 3) x[0] # 1 x[1] # 2 x[2] # 3 x[3] # IndexError: tuple index out of range Indexing with negative numbers will start from the last element as -1: x[-1] # 3 x[-2] # 2 x[-3] # 1 x[-4] # IndexError: tuple index out of range Indexing a range of elements print(x[:-1]) # (1,...
SELECT * FROM Employees ORDER BY LName This statement will return all the columns from the table Employees. IdFNameLNamePhoneNumber2JohnJohnson24681012141JamesSmith12345678903MichaelWilliams1357911131 SELECT * FROM Employees ORDER BY LName DESC Or SELECT * FROM Employees ORDER BY LName ASC...

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