I am gonna assume you already know about adding gradle dependencies firebase in android studio. If you don't just follow the guide from here. Add your app in firebase console, gradle sync android studio after adding dependencies. All dependencies are not needed just firebase database and firebase au...
Take a use case, like a chat app or a collaborative grocery list app (that basically requires a list of objects to be synced across users). If you use firebase database and add a value event listener to the chat parent node or grocery list parent node, you will end with entire chat structure from th...
When you have a huge JSON database, adding a value event listener doesn't make sense. It will return the huge JSON and parsing it would be time consuming. In such cases we can use pagination and fetch part of data and display or process it. Kind of like lazy loading or like fetching old chats when u...
In [1]: df = pd.DataFrame({'A': [1, 2, 3], 'B': [1.0, 2.0, 3.0], 'C': ['a', 'b', 'c'],
'D': [True, False, True]})
In [2]: df
Out[2]:
A B C D
0 1 1.0 a True
1 2 2.0 b False
2 3 3.0 c True
Getting a python list from a series:
In [3]: df['...
The model Magento uses to store customer and product data results in longer than average SQL queries and more reads. Enabling the Flat Catalog option for Categories and Products will merge product data into one table, therefore improving performance.
Login to your administration area and go to – Sy...
Using the library archive
Download the JAR and add it to the classpath for your Java project
Using a build tool
If you are using a build tool like Maven or Gradle:
Maven
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
...
Adding the aurelia-configuration to a cli application sometimes produces a build error. This is caused by a missing dependency so we simply add the dependency to the build bundle.
Try the following:
npm install deep-extend --save
npm install aurelia-configuration --save
Now add the followi...
The official site of angular-ui-bootstrap is here.
Follow the below instructions in order.
The list of files that are to be downloaded is in this link
Include all references in this order.
angular.js
angular-animate.js
ui-bootstrap-tpls-2.2.0.js (Reference to UI Bootstrap )
angular-sanitiz...
Description:
mov copies values of bits from source argument to destination argument.
Common source/destination are registers, usually the fastest way to manipulate values with[in] CPU.
Another important group of source_of/destination_for values is computer memory.
Finally some immediate values m...
Alias Declaration are affected by preceding using statements
namespace boost
{
namespace multiprecision
{
class Number ...
}
}
using namespace boost;
// Both Namespace are equivalent
namespace Name1 = boost::multiprecision;
namespace Name2 = multiprecision;
...
Php arrayiterator allows you to modify and unset the values while iterating over arrays and objects.
Example:
$array = ['1' => 'apple', '2' => 'banana', '3' => 'cherry'];
$arrayObject = new ArrayObject($array);
$iterator = $arrayObject->getIterator();
for($iterator; $iterator-...
GridView definition on ASPX page
As shown below, first column of grid is defined as a checkbox column, which is conditionally cleared as shown in further examples below (the header checkbox is only for selecting/un-selecting all rows on current page, but same can be extended for all on grid easily)...
MongoDB stores data records as BSON documents. BSON is the binary representation of JSON.
$ python
>>> from pymongo import MongoClient
>>> client = MongoClient()
>>> col = client.mydb.test
Create
Insert a single document insert_one(document)
>>> result = ...
This error message may be produced by the OpenSSH ssh client. It means that the TCP connection between the client and the server was abnormally closed by the server immediately after being accepted. Common reasons for this message include:
The SSH server process is malfunctioning--for example, it...
This error message may be produced by the OpenSSH ssh client. It means that the TCP connection between the client and the server was closed by the server immediately after being accepted. This message generally indicates the SSH server has been configured not to accept connections from the client fo...
To compare the difference of two dates, we can do the comparison based on the timestamp.
var date1 = new Date();
var date2 = new Date(date1.valueOf() + 5000);
var dateDiff = date1.valueOf() - date2.valueOf();
var dateDiffInYears = dateDiff/1000/60/60/24/365; //convert milliseconds into years
...
