Tutorial by Examples: n

import java.awt.FlowLayout; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.SwingUtilities; public class CustomFrame extends JFrame { private static CustomFrame statFrame; public CustomFrame(String labelText) { setSize(500, 500); ...

import java.awt.FlowLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; import javax.swing.SwingUtilities; public class CustomFrame extends JFrame { public CustomFrame(String labelText) { setSize(500...

Node.js can also be used to create command line utilities. The example below reads the first argument from the command line and prints a Hello message. To run this code on an Unix System: Create a new file and paste the code below. The filename is irrelevant. Make this file executable with chmo...

Using the AdvancedRTFEditorKit library you can serialize a DefaultStyledDocument to an RTF string. try { DefaultStyledDocument writeDoc = new DefaultStyledDocument(); writeDoc.insertString(0, "Test string", null); AdvancedRTFEditorKit kit = new AdvancedRTFEditorKit(); ...

git reset <filePath>

This layout uses one floated column to create a two-column layout with no defined widths. In this example the left sidebar is "lazy," in that it only takes up as much space as it needs. Another way to say this is that the left sidebar is "shrink-wrapped." The right content column...

git rev-list --oneline master ^origin/master Git rev-list will list commits in one branch that are not in another branch. It is a great tool when you're trying to figure out if code has been merged into a branch or not. Using the --oneline option will display the title of each commit. The ^ ...

Functions can take parameters so that their functionality can be modified. Parameters are given as a comma separated list with their types and names defined. func magicNumber(number1: Int) { print("\(number1) Is the magic number") } Note: The \(number1) syntax is basic String I...

Functions can return values by specifying the type after the list of parameters. func findHypotenuse(a: Double, b: Double) -> Double { return sqrt((a * a) + (b * b)) } let c = findHypotenuse(3, b: 5) //c = 5.830951894845301 Functions can also return multiple values using tuples. f...

For Alerts since iOS 8, you would use a UIAlertController but for versions before, you would have used a UIAlertView, which is now deprecated. 8.0 var alert = UIAlertController.Create(title, message, UIAlertControllerStyle.Alert); alert.AddAction(UIAlertAction.Create(otherTitle, UIAlertActionStyl...

To pass data from the current view controller to the next new view controller (not a previous view controller) using segues, first create a segue with an identifier in the relevant storyboard. Override your current view controller's prepareForSegue method. Inside the method check for the segue you j...

In iOS 8 Apple introduced the self sizing cell. Layout your UITableViewCells with Autolayout explicitly and UITableView takes care of the rest for you. Row height is calculated automatically, by default rowHeight value is UITableViewAutomaticDimension. UITableView property estimatedRowHeight is use...

We can make an AJAX request to Stack Exchange's API to retrieve a list of the top JavaScript questions for the month, then present them as a list of links. If the request fails or the returns an API error, our promise error handling displays the error instead. 6 View live results on HyperWeb. c...

A data.frame is a special kind of list: it is rectangular. Each element (column) of the list has same length, and where each row has a "row name". Each column has its own class, but the class of one column can be different from the class of another column (unlike a matrix, where all elemen...

Install Meteor On OS X and Linux Install the latest official Meteor release from your terminal: $ curl https://install.meteor.com/ | sh On Windows Download the official Meteor installer here. Create your app Once you've installed Meteor, create a project: $ meteor create myapp Run i...

In order to begin building with PayPal APIs, you have to create an application to obtain a client ID and secret. Go to https://developer.paypal.com/developer/applications/, sign in, and click on "Create App", as shown below: Next, enter an application name, select the sandbox testing a...

When testing you PayPal integration on sandbox, you'll need to have sandbox user accounts set up to use to go through the payment flow. Go to https://developer.paypal.com/developer/accounts/, log in using your PayPal account, and click on "Create Account", as below: Enter in the accoun...

cat file.txt will print the contents of a file. If the file contains non-ASCII characters, you can display those characters symbolically with cat -v. This can be quite useful for situations where control characters would otherwise be invisible. cat -v unicode.txt Very often, for interactive ...

Use the --number flag to print line numbers before each line. Alternatively, -n does the same thing. $ cat --number file 1 line 1 2 line 2 3 4 line 4 5 line 5 To skip empty lines when counting lines, use the --number-nonblank, or simply -b. $ cat -b file 1 line 1 2 line ...

man <command> This will show the manual page for the specified command. For example, man ping will show: PING(8) BSD System Manager's Manual PING(8) NAME ping -- send ICMP ECHO_REQUEST packets to network hosts SYNOPSIS ping [-AaCDdfno...