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Navigator works for both IOS and android. import React, { Component } from 'react'; import { Text, Navigator, TouchableHighlight } from 'react-native'; export default class NavAllDay extends Component { render() { return ( <Navigator initialRoute={{ title: 'Awesome Sc...

What is Concurrency? Doing multiple things at the same time. Taking advantage of number of cores available in multicore CPUs. Running multiple programs in parallel. Objectives of Concurrency Running program in background without hogging CPU. Define Tasks, Define Rules and let...

When a class needs to be provided with hard dependencies best practice is to use a constructor injection pattern where those dependencies are injected using a factory. Let's assume that MyClass is hard dependent on a value $dependency that needs to be resolved from the application config. <?php...

There are various ways to use colours in Processing since Processing is very flexible with colour formats. RGB and RGBA This is the standard RGB(A) notation and the default color mode. The first three colour values (red, green, blue) range from 0 to 255. For example, the below example is the colou...

The reference to the outer class uses the class name and this public class OuterClass { public class InnerClass { public void method() { System.out.println("I can access my enclosing class: " + OuterClass.this); } } } You can access fields and ...

Both escaped strings and raw strings can contain template expressions. Template expression is a piece of code which is evaluated and its result is concatenated into string. It starts with a dollar sign $ and consists of either a variable name: val i = 10 val s = "i = $i" // evaluates to ...

import WatchConnectivity var watchSession : WCSession? override func awake(withContext context: Any?) { super.awake(withContext: context) // Configure interface objects here. startWatchSession() } func startWatchSession(){ if(WCSession....

func isValidEmail(email: String) -> Bool { let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}" let emailTest = NSPredicate(format:"SELF MATCHES %@", emailRegEx) return emailTest.evaluate(with: email) } or you could use String extensio...

//create a list to hold all the values List<string> excelData = new List<string>(); //read the Excel file as byte array byte[] bin = File.ReadAllBytes("C:\\ExcelDemo.xlsx"); //or if you use asp.net, get the relative path byte[] bin = File.ReadAllBytes(Server.MapPath(&q...

Let's say that you have the following class: public class PersonInfo { public int ID { get; set; } [Display(Name = "First Name")] [Required(ErrorMessage = "Please enter your first name!")] public string FirstName{ get; set; } [Display(Name = "L...

//set the formatting options ExcelTextFormat format = new ExcelTextFormat(); format.Delimiter = ';'; format.Culture = new CultureInfo(Thread.CurrentThread.CurrentCulture.ToString()); format.Culture.DateTimeFormat.ShortDatePattern = "dd-mm-yyyy"; format.Encoding = new UTF8Encoding(); ...

public String getCitiesByCountry(String countryName) throws MalformedURLException, IOException { //Code to make a webservice HTTP request String responseString = ""; String outputString = ""; String wsURL = "http://www.webservicex.com/globalweather.asm...

Go to https://www.mozilla.org/firefox/new/. 1.Click on Download button. 2.An executable file will be downloaded. 3.Double click on the .exe file and click run. 4.Finish the setup. 5.Select the option of "Maintain shortcut on the desktop".

For iterating more than two lists simultaneously within list comprehension, one may use zip() as: >>> list_1 = [1, 2, 3 , 4] >>> list_2 = ['a', 'b', 'c', 'd'] >>> list_3 = ['6', '7', '8', '9'] # Two lists >>> [(i, j) for i, j in zip(list_1, list_2)] [(1, '...

The following tests range A2 to A7 for duplicate values. Remark: This example illustrates a possible solution as a first approach to a solution. It's faster to use an array than a range and one could use collections or dictionaries or xml methods to check for duplicates. Sub find_duplicates() ...

To test an add-on you are developing, you will likely desire to install it in Firefox temporarily. You can do so by loading it as a Temporary Add-on. To do so: Go to about:debugging Click on "Load Temporary Add-on" In the file picker, navigate to the directory containing the add-on f...

Slightly counterintuitively (but also the only sane way to make it work), this: val dyn: Dynamic = ??? dyn.x(y) = z is equivalent to: dyn.selectDynamic("x").update(y, z) while dyn.x(y) is still dyn.applyDynamic("x")(y) It is important to be aware of this, or else...

Using a CASE statement, conditionally display an expression in the column based on values found in another column, a.k.a. “my kingdom for an OR”. In the example, the result is obtained when the status of the transaction is Pending Fulfillment or Partially Fulfilled: CASE DECODE( {status}, 'Pending ...

The example builds a string from the name of the parent record, the name of this record, and the memo of this record. {createdfrom} || ' ' || {name} || ' ' || {memo}

In a string formula field, consider that some values might contain substrings which look to the browser like HTML. Unless this is intentional, it is important to protect the values from corruption. This is useful to avoid injection attacks: it prevents someone from entering HTML into a comment field...