Tutorial by Examples: rom

This is useful if you use rust in the backend and elm on the front end enum Complex{ Message(String), Size(u64) } let c1 = Complex::Message("hi"); let c2 = Complex::Size(1024u64); The encoded Json from rust will be: c1: {"variant": "Message", ...

When you really need to script ssh connection, piping the password into the ssh command does not work (echo passw0rd | ssh host). It is because the password is not read from standard input, but directly from TTY (teleprinter, teletypewriter, Teletype for historical reasons). But there is sshpass to...

// all variables `s` have the type `String` let s = "hi".to_string(); // Generic way to convert into `String`. This works // for all types that implement `Display`. let s = "hi".to_owned(); // Clearly states the intend of obtaining an owned obje...

Important: Using the dynamic configuration files (.htaccess) is a big performance hit. When you have access to the static configuration file (httpd.conf or something similar) you should use that instead. In the static configuration file, allow dynamic configuration files to override "Filei...

Initialize serial device import serial #Serial takes two parameters: serial device and baudrate ser = serial.Serial('/dev/ttyUSB0', 9600) to read single byte from serial device data = ser.read() to read given number of bytes from the serial device data = ser.read(size=5) to read one li...

Save aps.cer to a folder Open "Keychain access" and export the key that is under that certificate to a .p12 file (call it key.p12). To do that right click on it and choose Export. Save it to the same folder as step 1. On export you will be prompted for a password. Make something u...

JAXB can be used to generate classes from an model defined in XSD. It will then be possible to read XML document made against this XSD directly as java instances and inversly save these instances as XML document. Take the following XSD saved in a file named SimpleModel.xsd <?xml version="...

Swift 2.3 let url = NSURL(string: "http://google.com/lastPath") let lastPath = url?.lastPathComponent Swift 3.0 let url = URL(string: "http://google.com/lastPath") let lastPath = url?.lastPathComponent

Send a message using GCM HTTP connection server protocol: https://gcm-http.googleapis.com/gcm/send Content-Type:application/json Authorization:key=AIzaSyZ-1u...0GBYzPu7Udno5aA { "to": "/topics/foo-bar", "data": { "message": "T...

The following command restores the 'Users' database from 'D:\DB_Backup' file. RESTORE DATABASE Users FROM DISK = 'D:\DB_Backup'

Items are removed from a Collection by calling its .Remove method: Syntax: .Remove(index) ParameterDescriptionindexThe item to remove from the Collection. If the value passed is a numeric type or Variant with a numeric sub-type, it will be interpreted as a numeric index. If the value passed i...

Items can be retrieved from a Collection by calling the .Item function. Syntax: .Item(index) ParameterDescriptionindexThe item to retrieve from the Collection. If the value passed is a numeric type or Variant with a numeric sub-type, it will be interpreted as a numeric index. If the value pas...

The easiest way to clear all of the items from a Collection is to simply replace it with a new Collection and let the old one go out of scope: Public Sub Example() Dim foo As New Collection With foo .Add "One" .Add "Two" .Add "Thre...

adb pull /sdcard/file.txt

Supposing you have setup a django project, and the settings file is in an app named main, this is how you initialize your code import os, sys # Setup environ sys.path.append(os.getcwd()) os.environ.setdefault("DJANGO_SETTINGS_MODULE", "main.settings") # Setup django imp...

This uses the SwiftyDropbox library to upload a file from a NSFileHandle to the Dropbox account using upload sessions, handling every error case: import UIKit import SwiftyDropbox class ViewController: UIViewController { // filled in later in doUpload: var fileHandle : NSFileHandle?...

Before reading and writing text files you should know what encoding to use. See the Perl Unicode Documentation for more details on encoding. Here we show the setting of UTF-8 as the default encoding and decoding for the function open. This is done by using the open pragma near the top of your code (...

Create a new console application and add a reference to the Service Bus NuGet package, similar to the sending application above. Add the following using statement to the top of the Program.cs file. using Microsoft.ServiceBus.Messaging; Add the following code to the Main method, set ...

This sample demonstrates how to import the worksheet Azure Excel file blob to DB on the Azure SQL Server and how to export it from DB to Azure Excel blob. Prerequisites: Microsoft Visual Studio 2015 version Open XML SDK 2.5 for Microsoft Office An Azure storage account Azure SQL Server Add...

Assume having a method returning IEnumerable<T>, f.e. private IEnumerable<T> GetData() { try { // return results from database } catch(Exception exception) { throw; } } Creates an Observable and starts a method asynchronously. Sel...