Display a two dimensional (2D) array on the axes.
import numpy as np
from matplotlib.pyplot import imshow, show, colorbar
image = np.random.rand(4,4)
imshow(image)
colorbar()
show()
Swift
import Contacts
// Creating a mutable object to add to the contact
let contact = CNMutableContact()
contact.imageData = NSData() // The profile picture as a NSData object
contact.givenName = "John"
contact.familyName = "Appleseed"
let homeEmail = CNLabele...
typealias SuccessHandler = (NSURLSessionDataTask, AnyObject?) -> Void
This code block creates a type alias named SuccessHandler, just in the same way var string = "" creates a variable with the name string.
Now whenever you use SuccessHandler, for example:
func example(_ handler: S...
typealias Handler = () -> Void
typealias Handler = () -> ()
This block creates a type alias that works as a Void to Void function (takes in no parameters and returns nothing).
Here is a usage example:
var func: Handler?
func = {}
typealias Number = NSNumber
You can also use a type alias to give a type another name to make it easier to remember, or make your code more elegant.
typealias for Tuples
typealias PersonTuple = (name: String, age: Int, address: String)
And this can be used as:
func getPerson(for name: Strin...
It is used to duplicate a git repository from gerrit to anyway. Configuration file is $GERRIT_INSTALL/etc/replication.config.
Config file example to clone MyRepo from gerrit to backupServer
[remote "backup"]
url = ProjectUrlOnBackupServer/${name} #Example backup.some.org:/pub/git/${...
This plugin is mandatory to make Gerrit able to receive message from other services. As an example, it has to be install to use Sonar Gerrit plugin
Install jar file under plugins folder
Default configuration is sufficient
PermissionUtil is a simple and convenient way of asking for permissions in context. You can easily provide what should happen in case of all requested permissions granted (onAllGranted()), any request was denied (onAnyDenied()) or in case that a rational is needed (onRational()).
Anywhere in your A...
By default, routes only respond to GET requests. You can change this behavior by supplying the methods argument to the route() decorator.
from flask import request
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'POST':
do_the_login()
else:
...
A feature that has near zero variance is a good candidate for removal.
You can manually detect numerical variance below your own threshold:
data("GermanCredit")
variances<-apply(GermanCredit, 2, var)
variances[which(variances<=0.0025)]
Or, you can use the caret package to find...
If a feature is largely lacking data, it is a good candidate for removal:
library(VIM)
data(sleep)
colMeans(is.na(sleep))
BodyWgt BrainWgt NonD Dream Sleep Span Gest
0.00000000 0.00000000 0.22580645 0.19354839 0.06451613 0.06451613 0.06451613
Pred ...
Closely correlated features may add variance to your model, and removing one of a correlated pair might help reduce that. There are lots of ways to detect correlation. Here's one:
library(purrr) # in order to use keep()
# select correlatable vars
toCorrelate<-mtcars %>% keep(is.numeric)
...
(This assumes MySQL has been installed and that sudo is being used.)
Generating a CA and SSL keys
Make sure OpenSSL and libraries are installed:
apt-get -y install openssl
apt-get -y install libssl-dev
Next make and enter a directory for the SSL files:
mkdir /home/ubuntu/mysqlcerts
cd /home...
The update pattern in D3 version 3
A correct understanding of how the “enter”, “update” and “exit” selections work is fundamental for properly changing the dataviz using D3.
Since D3 version 3 (actually, since version 2), this snippet could set the transitions for both “enter” and “update” selecti...
Use the ls() commands to find objects by name:
freds = cmds.ls("fred")
#finds all objects in the scene named exactly 'fred', ie [u'fred', u'|group1|fred']
Use * as a wildcard:
freds = cmds.ls("fred*")
# finds all objects whose name starts with 'fred'
# [u'fred', u'freder...
Using canvas elements
HTML provides the canvas element for building raster-based images.
First build a canvas for holding image pixel information.
var canvas = document.createElement('canvas');
canvas.width = 500;
canvas.height = 250;
Then select a context for the canvas, in this case two-di...
To add the BottomNavigationView follow these steps:
Add in your build.gradle the dependency:
compile 'com.android.support:design:25.1.0'
Add the BottomNavigationView in your layout:
<android.support.design.widget.BottomNavigationView
xmlns:android="http://schemas.andro...
The web server serves the user based on the request sent by the browser but how the user will tell the browser what he/she is looking for, that's when we need URL. Every web page on the internet has got a URL that can be bookmarked, copied, shared, and saved for future reference. In single page Back...
