Tutorial by Examples: l

In django, there is a url mapper which maps URLs to specific functions (views) which return responses. This strict separation between the file system layout and the URL layout allows great flexibility when writing applications. All url patterns are stored in one or more urls.py files, and there is ...

add_shortcode is wp keyword. // recent-posts is going to be our shortcode. add_shortcode('recent-posts', 'recent_posts_function'); // This function is taking action when recent post shortcode is called. function recent_posts_function() { query_posts(array('orderby' => 'date', 'order' =&...

href binding is not native to KnockoutJS, so to get dynamic links use a custom binding handler: <a data-bind="href: myUrl">link with dynamic href</a> ko.bindingHandlers['href'] = { update: function(element, valueAccessor) { element.href = ko.utils.unwrapObservable(v...

public class MyPage : ContentPage { RelativeLayout _layout; Label MiddleText; public MyPage() { _layout = new RelativeLayout(); MiddleText = new Label { Text = "Middle Text" }; MiddleText.SizeChanged += ...

/* SD card datalogger This example shows how to log data from three analog sensors to an SD card using the SD library. The circuit: * analog sensors on analog ins 0, 1, and 2 * SD card attached to SPI bus as follows: ** MOSI - pin 11 ** MISO - pin 12 ** CLK - pin 13 ** CS - ...

/* SD card file dump This example shows how to read a file from the SD card using the SD library and send it over the serial port. The circuit: * SD card attached to SPI bus as follows: ** MOSI - pin 11 ** MISO - pin 12 ** CLK - pin 13 ** CS - pin 4 created 22 December 20...

/* SD card basic file example This example shows how to create and destroy an SD card file The circuit: * SD card attached to SPI bus as follows: ** MOSI - pin 11 ** MISO - pin 12 ** CLK - pin 13 ** CS - pin 4 created Nov 2010 by David A. Mellis modified 9 Apr 2012 by ...

/* Listfiles This example shows how print out the files in a directory on a SD card The circuit: * SD card attached to SPI bus as follows: ** MOSI - pin 11 ** MISO - pin 12 ** CLK - pin 13 ** CS - pin 4 created Nov 2010 by David A. Mellis modified 9 Apr 2012 ...

> library(ggplot2) > ggplot(iris,aes(Sepal.Width)) + geom_density() + xlim(1,3.5) Using xlim or ylim the plot is not cutted, ggplot subsets the data before calling the stat function (stat_density in this case). You can see it in the warning message. Warning message: Removed 19 rows cont...

ggplot(iris[iris$Species == "setosa",],aes(Sepal.Width)) + geom_density() Here, we are subsetting the dataframe before passing it to ggplot. It is a very useful tool derived from the data frame data structure. To make the code more readable, one can also use dplyr's filter: libr...

When testing with Google App Engine's testing library the challenges of eventual consistency are present in the same manner they will be in production. Therefore in order to write something into the datastore to test retrieval you have to create a context which is strongly consistent. type Foo str...

This example shows how to find circular blobs in an grayscale image. The evaluation of the circularity of a blob is done using the area and the perimeter (arc length) of the contour. The center point gets evaluated using the moments of the contour. #include "opencv/cv.h" #include &quot...

When the temp table is created by itself, it will remain while the connection is open. // Widget has WidgetId, Name, and Quantity properties public async Task PurchaseWidgets(IEnumerable<Widget> widgets) { using(var conn = new SqlConnection("{connection string}")) { ...

Places to find React components and libraries; Catalog of React Components JS.coach

To install openshift follow installation steps on https://install.openshift.com

import pygame pygame.init() WIDTH = 300 HEIGHT = 200 SCREEN = pygame.display.set_mode((WIDTH, HEIGHT)) pygame.display.set_caption('My Game') WHITE = (255, 255, 255) BLACK = (0, 0, 0) RED = (255, 0, 0) GREEN = (0, 255, 0) BLUE = (0, 0, 255) YELLOW = (255, 255, 255) SCREEN.fill(R...

function myFunction { param( # If parameter 'a' is used, then 'c' is mandatory # If parameter 'b' is used, then 'c' is optional, but allowed # You can use parameter 'c' in combination with either 'a' or 'b' # 'a' and 'b' cannot be used together [p...

Pretext: These are detailed instructions on how to set up a Raspberry Pi with the Raspbian operating system. These instructions are somewhat Windows specific. Some installation steps may apply to other operating systems as well, but keep the former in mind. Contents Requirements Choosing an ...

We would be creating mongodb as a replica set having 3 instances. One instance would be primary and the other 2 instances would be secondary. For simplicity, I am going to have a replica set with 3 instances of mongodb running on the same server and thus to achieve this, all three mongodb instances...

Given a file Sample called movieslist. Troy Gladiator Robin Hood King Arthur BraveHeart The Last Samurai Normal grep returns grep "Gladiator" movieslist Gladiator Now,using grep to print the below or above lines of the file. To print the below line grep -A 1 Gladiator movie...