Tutorial by Examples: w

Use custom middleware + Superagent

This is example has extracted from this boilerplate. Custom middleware: export default function clientMiddleware() { return ({dispatch, getState}) => { return next => action => { if (typeof action === 'function') { return action(dispatch, getState); } ...

Install in Eclipse and Build Hello World

(Tested with ANTLR 4.5.3, Eclipse Neon, ANTLR 4 IDE 0.3.5, and Java 1.8) Download the latest ANTLR. Make sure to get the complete ANTLR Java binaries jar. Save to any appropriate location, for example the folder where other Java libraries are stored. It doesn’t matter where, just remember the loc...

Difference between Tk and Toplevel

Tk is the absolute root of the application, it is the first widget that needs to be instantiated and the GUI will shut down when it is destroyed. Toplevel is a window in the application, closing the window will destroy all children widgets placed on that window{1} but will not shut down the program...

arranging the window stack (the .lift method)

The most basic case to lift a particular window above the others, just call the .lift() method on that window (either Toplevel or Tk) import tkinter as tk #import Tkinter as tk #change to commented for python2 root = tk.Tk() for i in range(4): #make a window with a label window = tk...

Targeting only main WordPress loop

WordPress is applying pre_get_posts filter to literally any loop it generates. It means that all changes we are making in our callback function are applied to all exiting loops. Obviously it is not what we want in most scenarios. In most cases we would like to target only main loop, and only for n...

Using webpack-dev-server

Setup After setting up a simple project to use webpack, babel and react issuing $npm i -g webpack-dev-server will install the development http server for quicker development. Modifying webpack.config.js var path = require('path'); module.exports = { entry: './src/index.js', output: { ...

Create a pygame window

This creates a window in fullscreen with size 500x500 pixels: pygame.init() screen = pygame.display.set_mode((500, 500), pygame.FULLSCREEN) screen represents from now on the window on screen; it is a pygame.Surface object. Anything that should be come visible to the user has to be drawn onto it...

Hello World Firebase Realtime Database in Node

System Requirements: Node JS Getting Started First Go to Firebase Console and Create New Project. After Creating the project, in project click on settings icon besides project Name in left sidebar and select Permissions. On Permissions Page Click on Service accounts in left sidebar then c...

Basic Site Crawl

pages = [] crawler = Anemone::Core.new(url, options) crawler.on_every_page do |page| results << page.url end crawler.run

Modal windows

Ionic has it's own extension for displaying a modal window. Modals can be created by inserting the template straight to the view with a <script> tag or by using a separate template file. In this example we are assuming you have a html file named modal-template.html in a folder called templates...

Hello world

Initial starting point for iron-data-table. Working jsBin <!DOCTYPE html> <html> <head> <base href="https://polygit.org/polymer+:master/iron-data-table+Saulis+:master/components/"> <link rel="import" href="polymer/polymer.html&quo...

Row details

Expand row details to display additional data. Working jsBin <!DOCTYPE html> <html> <head> <base href="https://polygit.org/polymer+:master/iron-data-table+Saulis+:master/components/"> <link rel="import" href="polymer/polymer.html&...

Edit row details

Working jsBin <!DOCTYPE html> <html> <head> <base href="https://polygit.org/polymer+:master/iron-data-table+Saulis+:master/components/"> <link rel="import" href="polymer/polymer.html"> <script src="webcom...

Edit row details using sub-element

This example uses a separate element to edit bound data to the row-detail template. Working jsBin <!DOCTYPE html> <html> <head> <base href="https://polygit.org/polymer+:master/iron-data-table+Saulis+:master/components/"> <link rel="import&q...

Select row, prevent deselection

Default behavior is to de-select row when clicked twice. In some use cases, you might want to disable this de-selecting behavior. Note table.deselectItem(item) method will imperatively deselect an item. This works with both item or index (when using items array) as an argument. Working jsBin &lt...

Hello World

start Octave by running the command octave (the executable should be in your path) type disp('Hello, World!') at the Octave command prompt >> disp('Hello, World!') Hello, World!

What data does the tracking snippet capture?

When you add either of these tracking snippets to your website, you send a pageview for each page your users visit. Google Analytics processes this data and can infer a great deal of information including: The total time a user spends on your site. The time a user spends on each page and in what o...

Eternal wait

The simplest form of wait statement is simply: wait; Whenever a process executes this it is suspended forever. The simulation scheduler will never resume it again. Example: signal end_of_simulation: boolean := false; ... process begin clock <= '0'; wait for 500 ps; clock <= '1...
vhdl • Wait

Sensitivity lists and wait statements

A process with a sensitivity list cannot also contain wait statements. It is equivalent to the same process, without a sensitivity list and with one more last statement which is: wait on <sensitivity_list>; Example: process(clock, reset) begin if reset = '1' then q &l...
vhdl • Wait

Wait until condition

It is possible to omit the on <sensitivity_list> and the for <timeout> clauses, like in: wait until CONDITION; which is equivalent to: wait on LIST until CONDITION; where LIST is the list of all signals that appear in CONDITION. It is also equivalent to: loop ...
vhdl • Wait

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