If the built in attributes are not sufficient to validate your model data, then you can place your validation logic in a class derived from ValidationAttribute. In this example only odd numbers are valid values for a model member.
Custom Validation Attribute
public class OddNumberAttribute : Valid...
How do you handle errors, rather then log them to the console?
Bad way:
Router.route('/')
.get((req, res) => {
Request.find((err, r) => {
if(err){
console.log(err)
} else {
res.json(r)
}
})
})
.post((req, res) => {
const reque...
The following example is a very useful basis when you are trying to convert transaction data to un-pivoted data for BI/reporting reasons, where the dimensions which are to be un-pivoted can have a dynamic set of columns.
For our example, we suppose that the raw data table contains employee assessme...
When sending a notification to an iOS device, you must set priority: "high" for it to wake up. Otherwise, the notification will not be received while the phone is asleep.
Sets the priority of the message. Valid values are "normal" and "high." On iOS, these correspond...
var renderer = Platform.GetRenderer(visualElement);
if (renderer == null)
{
renderer = Platform.CreateRenderer(visualElement);
Platform.SetRenderer(visualElement, renderer);
}
DoSomeThingWithRender(render); // now you can do whatever you want with render
OpenCL is low level api so it must be implemented in "C space" first. For that, one needs to download header files from Khronos' site. My hardware is AMD and capable of version 1.2, downloading
opencl.h
cl_platform.h
cl.h
cl_ext.h
cl_egl.h
cl_dx9_media_sharing.h
cl_d3d10.h
c...
mongodump --db mydb --gzip --out "mydb.dump.$(date +%F_%R)"
This command will dump a bson gzipped archive of your local mongod 'mydb' database to the 'mydb.dump.{timestamp}' directory
mongorestore --db mydb mydb.dump.2016-08-27_12:44/mydb --drop --gzip
This command will first drop your current 'mydb' database and then restore your gzipped bson dump from the 'mydb mydb.dump.2016-08-27_12:44/mydb' archive dump file.
Prerequisites
Java8 (1.8.0_91)
Eclipse neon (JavaScript and Web Developer)
Play Framework 2.5.4
Installing Scala in Eclipse
Launch the Eclipse
Open Help > Eclipse Marketplace
Type Scala in Find
Install Scala IDE
Setup sbteclipse
Open play project .\project\ plugins.sbt
Add f...
1.Download font-awesome from here.
2.Copy the font-awesome directory into your project.
3.In the of your html, reference the location to your font-awesome.min.css.
<link rel="stylesheet" href="path/to/bootstrap/css/bootstrap.min.css">
<link rel="stylesheet"...
Suppose we want to have the following behaviour - We have a heading (say h3 element) and on clicking it, we want it to become an input box so that we can modify heading name. React makes this highly simple and intuitive using component states and if else statements. (Code explanation below)
// I ha...
The first thing you want to do for local development is install ElasticSearch in your machine and test it to see if it is running. It requires Java to be installed. The installation is pretty straightforward:
Mac OS X: brew install elasticsearch
Ubuntu: sudo apt-get install elasticsearch
Then...
When you are getting started with ElasticSearch (ES) it might be good to have a graphical tool that helps you explore your data. A plugin called elasticsearch-head does just that. To install it, do the following:
Find out in which folder ES is installed: ls -l $(which elasticsearch)
cd into this...
