Tutorial by Examples: r

The following scripts are for uploading a file from the server filesystem into the server. Mostly for config files and filewatchers. //https://forums.meteor.com/t/read-file-from-the-public-folder/4910/5 // Asynchronous Method. Meteor.startup(function () { console.log('starting up'); ...

Add React to your project: meteor npm install --save react react-dom react-mounter Create the client/helloworld.jsx file to display a simple React component: import React, { Component } from 'react'; import { mount } from 'react-mounter'; // This component only renders a paragraph containin...

It's possible to send broadcast to BroadcastReceiver with adb. In this example we are sending broadcast with action com.test.app.ACTION and string extra in bundle 'foo'='bar': adb shell am broadcast -a action com.test.app.ACTION --es foo "bar" You can put any other supported type to b...

We can also use macros for making code easier to read and write. For example we can implement macros for implementing the foreach construct in C for some data structures like singly- and doubly-linked lists, queues, etc. Here is a small example. #include <stdio.h> #include <stdlib.h>...

def arg = [phrase: 'interpolated'] assert "This is $arg.phrase" == 'This is interpolated'

def str = 'old' def interpolated = "I am the ${str} value" assert interpolated == 'I am the old value' str = 'new' assert interpolated == 'I am the old value'

We can have lazy interpolation in Strings. This is different than normal interpolation as the GString can potentially have different values, depending on the closure, whenever it is converted into a String. def str = 'old' def interpolated = "I am the ${ -> str} value" assert interpo...

def str = 'dsl' def interpolated = "Groovy ${str.length() + 1} easy ${str.toUpperCase()}" assert interpolated == 'Groovy 4 easy DSL' str = 'Domain specific language' assert interpolated == 'Groovy 4 easy DSL'

<style name="AppTheme" parent="Theme.AppCompat"> <item name="android:colorEdgeEffect">@color/my_color</item> </style>

5.0 The ripple animation is shown when user presses clickable views. You can use the same ripple color used by your app assigning the ?android:colorControlHighlight in your views. You can customize this color by changing the android:colorControlHighlight attribute in your theme: This effect colo...

This attribute can change the background of the Status Bar icons (at the top of the screen) to white. <style name="AppTheme" parent="Theme.AppCompat"> <item name="android:windowLightStatusBar">true</item> </style>

The navigation bar (at the bottom of the screen) can be transparent. Here is the way to achieve it. <style name="AppTheme" parent="Theme.AppCompat"> <item name="android:windowTranslucentNavigation">true</item> </style> The Status Bar (t...

5.0 This attribute is used to change the navigation bar (one, that contain Back, Home Recent button). Usually it is black, however it's color can be changed. <style name="AppTheme" parent="Theme.AppCompat"> <item name="android:navigationBarColor">@col...

Given two types T and U, &T will coerce (implicitly convert) to &U if and only if T implements Deref<Target=U> This allows us to do things like this: fn foo(a: &[i32]) { // code } fn bar(s: &str) { // code } let v = vec![1, 2, 3]; foo(&v); // &Vec&l...

Microbenchmark is useful for estimating the time taking for otherwise fast procedures. For example, consider estimating the time taken to print hello world. system.time(print("hello world")) # [1] "hello world" # user system elapsed # 0 0 0 This i...

As well as being able to create an array by filtering out nil from the transformed elements of a sequence, there is also a version of flatMap(_:) that expects the transformation closure to return a sequence S. extension SequenceType { public func flatMap<S : SequenceType>(transform: (Sel...

A class constructor must have the same name as its class. Let's create a constructor for a class Person: class Person { String name; String gender; int age; Person(this.name, this.gender, this.age); } The example above is a simpler, better way of defining the constructor than the...

The easiest way to handle and manage gems is by using bundler. Bundler is a package manager comparable to bower. To use bundler you first need to install it. gem install bundler After you have bundler up and running all you need to do is add gems to your Gemfile and run bundle in your termi...

Just as you're able to bind data from a view to the model, you can also bind props using the same v-bind directive for passing information from parent to child components. JS new Vue({ el: '#example', data: { msg: 'hello world' } }); Vue.component('child', { props:...

Here is an example of basic overriding in Python (for the sake of clarity and compatibility with both Python 2 and 3, using new style class and print with ()): class Parent(object): def introduce(self): print("Hello!") def print_name(self): print("Parent...