&& chains two commands. The second one runs only if the first one exits with success.
|| chains two commands. But second one runs only if first one exits with failure.
[ a = b ] && echo "yes" || echo "no"
# if you want to run more commands within a logical c...
This Example using Standard EXE Project With addition of a Module File.
Create New "Standard EXE" Project. So here, a Form will get added to the Project by default.
Add a Module File to the Project
Place a Command Button on the Form
Create Command Button Click Event.
Module code...
In latex we can use built-in commands to execute code whether the conditions are true or not.
Comparing two integers: \ifnum\value{num}>n {A} \else {B}\fi
This code executes A if num>n else B. We can substitute > with < and =.
If a number is odd: \ifodd\value{num} {A}\else {B}\fi
If ...
When a navigation property exist on a model, Entity Framework will automatically create a Foreign Key column. If a specific Foreign Key name is desired but is not contained as a property in the model, it can be set explicitly using the Fluent API. By utilizing the Map method while establishing the F...
BFS can be used to find the connected components of an undirected graph. We can also find if the given graph is connected or not. Our subsequent discussion assumes we are dealing with undirected graphs.The definition of a connected graph is:
A graph is connected if there is a path between every p...
Suppose we'd like to invoke the JavaScript function JSON.stringify which receives an object, encodes it into a JSON string and returns it.
All we'd have to do is write the function signature, mark it as external and annotate it with the @JS annotation:
@JS("JSON.stringify")
external St...
In this example, we use this database:
"your-project-name" : {
"users" : {
"randomUserId1" : {
"display-name" : "John Doe",
"gender" : "male"
}
"randomUserId2" :...
Step 1 - installing VirtualBox
Download and install VirtualBox according to your operating system. , it is required to run Genymotion.
Step 2 - downloading Genymotion
Go to the Genymotion download page and download Genymotion according to your operating system.
Note: you will need to create a ...
Many developers have this problem when they work on huge projects, especially if they work on some modular CMS on plugins, addons, components etc. Here is solution for safe session start where if first checked PHP version to cover all versions and on next is checked if session is started. If session...
Throwable has two direct subclasses, Exception and Error. While it's possible to create a new class that extends Throwable directly, this is inadvisable as many applications assume only Exception and Error exist.
More to the point there is no practical benefit to directly subclassing Throwable, as ...
If developers want to test Google Maps or any other Google service like Gmail,Youtube, Google drive etc. then they first need to install Google framework on Genymotion. Here are the steps:-
4.4 Kitkat
5.0 Lollipop
5.1 Lollipop
6.0 Marshmallow
7.0 Nougat
7.1 Nougat (webview patch)
Download fro...
Using the magick command (or `convert for IM 6.x users) you con convert any image format to any other. with no other arguments, as little processing as possible will be done to move from one format to the other. Simply specify your input and output files. To convert a JPEG to a PNG:
$ magick image....
Create a new Xamarin Forms app using PCL File -> New Solution -> Multiplatform App -> Xamarin Forms -> Forms App; Name the project as EffectsDemo
Under the iOS project, add a new Effect class that inherits from PlatformEffect class and overrides the methods OnAttached, OnDetached and ...
There may be multiple reason why you want to create a text file in batch.
But whatever the reason may be, this is how you do it.
If you want to overwrite an existing text file use >.
Example:
@echo off
echo info to save > text.txt
But if you want to append text to an already existing t...
You may want to copy files from one place to another. In this example we'll teach you.
You can use the command xcopy. The syntax is xcopy c:\From C:\To
Example:
@echo off
xcopy C:\Folder\text.txt C:\User\Username\Desktop
There are also switches you can use. If you want to view them open up co...
Calculating the power of a given number can be done recursively as well.
Given a base number n and exponent e, we need to make sure to split the problem in chunks by decreasing the exponent e.
Theoretical Example:
2² = 2x2
2³ = 2x2x2
or, 2³ = 2² x 2In there lies the secret of our recursive al...
Most examples show instantiating and holding a LazySingleton object until the owning application has terminated, even if that object is no longer needed by the application. A solution to this is to implement IDisposable and set the object instance to null as follows:
public class LazySingleton : ID...
