Detecting the current state of the network connection and responding to any changes that might occur, can be done by using one of several plugins. This example is about the cordova-plugin-network-information plugin.
Add the plugin to the project:
cordova plugin add cordova-plugin-network-informati...
Counting rows based on a specific column value:
SELECT category, COUNT(*) AS item_count
FROM item
GROUP BY category;
Getting average income by department:
SELECT department, AVG(income)
FROM employees
GROUP BY department;
The important thing is to select only columns specified in the GRO...
Rebasing when pulling
If you are pulling in fresh commits from the remote repository and you have local changes on the current branch then git will automatically merge the remote version and your version. If you would like to reduce the number of merges on your branch you can tell git to rebase you...
If you want to keep on-premises copy of the Gradle and let the Wrapper use it in the builds, you can set the distributionUrl pointing to your copy on the wrapper task:
task wrapper(type: Wrapper) {
gradleVersion = '2.0'
distributionUrl = "http\://server/dadada/gradle-${gradleVersion}...
There are three types of code swaps that Instant run enables to support faster debugging and running app from your code in Android Studio.
Hot Swap
Warm Swap
Cold Swap
When are each of these swaps triggered?
HOT SWAP is triggered when an existing method's implementation is changed.
WARM SW...
There are a few changes where instant won't do its trick and a full build and reinstall fo your app will happen just like it used to happen before Instant Run was born.
Change the app manifest
Change resources referenced by the app manifest
Change an Android widget UI element (requires a Clean ...
On of the overloads of the Select extension methods also passes the index of the current item in the collection being selected. These are a few uses of it.
Get the "row number" of the items
var rowNumbers = collection.OrderBy(item => item.Property1)
.ThenBy...
TakeWhile returns elements from a sequence as long as the condition is true
int[] list = { 1, 10, 40, 50, 44, 70, 4 };
var result = list.TakeWhile(item => item < 50).ToList();
// result = { 1, 10, 40 }
Lambdas are meant to provide inline implementation code for single method interfaces and the ability to pass them around as we have been doing with normal variables. We call them Functional Interface.
For example, writing a Runnable in anonymous class and starting a Thread looks like:
//Old way
n...
Open Repo
Create new repo (My advice first add pods on a temporary repo before adding to your original project)
Fill Repository name with your repo name. I'll use "myrepo" for this tutorial and will use "<" and ">" symbols for the parts you should change to yo...
In this example, we simply create and show a push button in a window frame on the desktop. The push button will have the label Hello world!
This represents the simplest possible Qt program.
First of all we need a project file:
helloworld.pro
QT += core gui
greaterThan(QT_MAJOR_VERSION, ...
Let's say you have two commits d9e1db9 and 5651067 and want to see what happened between them.
d9e1db9 is the oldest ancestor and 5651067 is the final descendant in the chain of commits.
gitk --ancestry-path d9e1db9 5651067
On linux: If you don't have pip installed, install it first:
curl "https://bootstrap.pypa.io/get-pip.py" -o "get-pip.py"
sudo python get-pip.py
Then install awscli:
sudo pip install awscli
On Windows: Download the latest installers from here
Now you have aws cli installed, you'll have to configure it access your AWS resources. You can have multiple profiles like test, dev, prod, etc profiles. So let's assume you want to configure it for your test environment.
aws configure --profile=test
It will ask for following information:
AWS A...
The best part about aws cli is that you can embed the commands into a script and can trigger them based on some criteria. Like auto deployment on production (in Elastic Beanstalk), no need to go to AWS Console to select and deploy.
You'll get all the available commands by running:
# This will give...
Write formatted data to string
int sprintf ( char * str, const char * format, ... );
use sprintf function to write float data to string.
#include <stdio.h>
int main ()
{
char buffer [50];
double PI = 3.1415926;
sprintf (buffer, "PI = %.7f", PI);
printf ("%s\n&...
Take a close look at these two property files which are seemingly completely identical:
except they are really not identical:
(screenshots are from Notepad++)
Since trailing whitespace is preserved the value of lastName would be "Smith" in the first case and "Smith " in th...
Consider the Node class having 3 members data, left child pointer and right child pointer like below.
public class Node {
public int data;
public Node left;
public Node right;
public Node(int data){
this.data = data;
}
}
We can traverse the tree construct...
