Tutorial by Examples: s

SSH-Agent

If you have set a long passphrase and do not wish to keep entering it every time you want to connect to the server, you can use SSH-Agent to store your passphrase while you are logged in on your computer. Start the ssh-agent in the background: eval "$(ssh-agent -s)" # Agent pid 59566 ...

Secure Shell • Getting started with Secure Shell

Custom Listview comprises of rows that are designed as per the users needs.

For the layout above your customrow.axml file is as shown below <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_heigh...

Xamarin.Android • Custom ListView

Using MarkupExtension with Converters to skip recource declaration

Usually to use the converter, we have to define it as resource in the following way: <converters:SomeConverter x:Key="SomeConverter"/> It is possible to skip this step by defining a converter as MarkupExtension and implementing the method ProvideValue. The following example conve...

wpf • Value and Multivalue Converters

Use IMultiValueConverter to pass multiple parameters to a Command

It is possible to pass multiple bound values as a CommandParameter using MultiBinding with a very simple IMultiValueConverter: namespace MyProject.Converters { public class Converter_MultipleCommandParameters : MarkupExtension, IMultiValueConverter { public object Convert(object...

wpf • Value and Multivalue Converters

Create relative path for asset

symfony3 • Asset Management with Assetic

Create absolute path for asset

symfony3 • Asset Management with Assetic

Separate Overrides from Bug Fixes

In ExtJS, you can override nearly any method of the framework and replace it with your own. This allows you to modify existing classes without directly modifying the ExtJS source code. Sometimes, you may want to enhance an existing class or provide a sane default property on a class. For example, ...

extjs • Common Pitfalls & Best Practices

Basic webpage using bootstrap components

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1">...

twitter-bootstrap • Getting started with twitter-bootstrap

Mongoose connection

Make sure to have mongodb running first! mongod --dbpath data/ package.json "dependencies": { "mongoose": "^4.5.5", } server.js (ECMA 6) import mongoose from 'mongoose'; mongoose.connect('mongodb://localhost:27017/stackoverflow-example'); const db = mon...

Node.js • Database (MongoDB with Mongoose)

Insert data

ECMA 6: const user = new User({ name: 'Stack', password: 'Overflow', }) ; user.save((err) => { if (err) throw err; console.log('User saved!'); }); ECMA5.1: var user = new User({ name: 'Stack', password: 'Overflow', }) ; user.save(function (err) { ...

Node.js • Database (MongoDB with Mongoose)

Catching and handling errors in user code

On error move to labelled code and see if there is a specific error that needs to be handled. Public Const cErrCodeNotNumber = 2262 ' This value must be a number. Public Const cErrCodeNumericOverflow = 2263 ' The number is too large. Private Sub MySub() Dim objConn As ADODB.Connection ...

access-vba • Access Error Codes (Form.Error, DataErr)

Binding modes and defaults

There are three modes of XAML bindings exists for either Binding and x:Bind: OneTime: Update happens only once, on initialization of the view during InitializeComponent() call. (ViewModel[sends data when initializing] -> View) OneWay: View is updated when ViewModel changes. But not in the rev...

uwp • Binding vs x:Bind

When to use x:Bind

When calling methods directly from the view. If performance matters really bad (scientific spaceship stuff) When you want to get compile time errors

uwp • Binding vs x:Bind

When to use Binding

Use it if you want to be flexible about the source type of your data. It won't bind to an actual property but to its name. If you want to bind to the DataContext

uwp • Binding vs x:Bind

Search by filename

While in the sources tab use CTRL+O (⌘+O for Mac) to search by filename.

google-chrome-devtools • Getting started with google-chrome-devtools

Go to member (javaScript function/CSS rule)

Use CTRL+SHIFT+O (⌘+SHIFT+O for mac) to navigate to a javaScript function/CSS rule when viewing a file.

google-chrome-devtools • Getting started with google-chrome-devtools

file manipulation commands

List of commands that will be introduced here: ls #view contents of a directory touch #create new file mkdir #create new directory cp #copy contents of one file to another mv #move file from one location to another rm #delete a file or directory ls examples jennifer@my_co...

unix • Basic console commands

cd command, directories explained

michael@who-cares:~$ The symbol ~ after the who-cares: is the current directory. ~ actually means the person's home directory. In this case, that's /home/michael. michael@who-cares:~$ cd Downloads michael@who-cares:~/Downloads$ Looks for Downloads in the current directory, then makes that th...

unix • Basic console commands

Gentoo/Funtoo Installation

Elixir is available in main packages repository. Update the packages list before installing any package: emerge --sync This is one step installation: emerge --ask dev-lang/elixir

Elixir Language • Installation

Install Jekyll on Linux Mint 18

Install jekyll on Linux Mint 18 with the following steps: sudo apt install ruby sudo apt install build-essential sudo apt install ruby-dev sudo gem install jekyll

jekyll • Getting started with jekyll