Tutorial by Examples: er

Access to Theme Resources in Xaml

Snippet from MyExampleFile.xaml <TextBlock Foreground="{ThemeResource SystemControlBackgroundAccentBrush}" Text="This is a colored textbox that use the Accent color of your Windows 10"/> <TextBlock Foreground="{ThemeResource SystemControlBackgroundBa...

uwp • Theme Resources

Access to Theme Resources in C#

Snippet from MyExampleFile.xaml <TextBlock x:Name="MyTextBlock" Text="This is a TextBlock colored from the code behind"/> Snippet from MyExampleFile.xaml.cs // We use the application's Resource dictionary to get the current Accent of your Windows 10 ...

uwp • Theme Resources

The BASH_ALIASES is an internal bash assoc array

Aliases are named shortcuts of commands, one can define and use in interactive bash instances. They are held in an associative array named BASH_ALIASES. To use this var in a script, it must be run within an interactive shell #!/bin/bash -li # note the -li above! -l makes this behave like a login s...

Bash • Aliasing

Generate Cryptographically Random Data

To generate samples of cryptographically random data: final byte[] sample = new byte[16]; new SecureRandom().nextBytes(sample); System.out.println("Sample: " + DatatypeConverter.printHexBinary(sample)); Produces output similar to: Sample: E4F14CEA2384F70B706B53A6DF8C5EFE Note...

Java Language • Security & Cryptography

Generate Public / Private Key Pairs

To generate key pairs using different algorithms and key sizes: final KeyPairGenerator dhGenerator = KeyPairGenerator.getInstance("DiffieHellman"); final KeyPairGenerator dsaGenerator = KeyPairGenerator.getInstance("DSA"); final KeyPairGenerator rsaGenerator = KeyPairGenerator...

Java Language • Security & Cryptography

How to perform CRUD operations using SharePoint 2010 REST Interface

Create In order to perform a Create operation via REST, you must perform the following actions: Create an HTTP request using the POST verb. Use the service URL of the list to which you want to add an entity as the target for the POST. Set the content type to application/json. Serialize the JSON...

sharepoint • REST Services

Compute and Verify Digital Signatures

To compute a signature: final PrivateKey privateKey = keyPair.getPrivate(); final byte[] data = "FOO BAR".getBytes(); final Signature signer = Signature.getInstance("SHA1withRSA"); signer.initSign(privateKey); signer.update(data); final byte[] signature = signer.sign();...

Java Language • Security & Cryptography

Changing delimiter

You can change the "$" delimiter to any other. The following example: from string import Template class MyOtherTemplate(Template): delimiter = "#" data = dict(id = 1, name = "Ricardo") t = MyOtherTemplate("My name is #name and I have the id: #id&quot...

Python Language • Templates in python

Testing Http Service

Usually, services call remote Api to retrieve/send data. But unit tests shouldn't do network calls. Angular internally uses XHRBackend class to do http requests. User can override this to change behavior. Angular testing module provides MockBackend and MockConnection classes which can be used to tes...

Angular 2 • Testing an Angular 2 App

5. Populating array with specific text from string via start and end characters.

'Note: I use this method to extract non-html data in extracted GET telnet results 'This example effectively grabs every other vehicle that have start and finish 'characters, which in this case is "/". 'Resulting in an array like this: 'extractedData(0) = "/Jeep" 'extractedD...

vbscript • Strings

4. Chaining string manipulation methods together.

Dim exStr : exStr = " <Head>data</Head> " Dim res res = Ucase(Replace(Mid(exStr, instr(exStr, ">")+1,4), "ata", "ark")) 'res now equals DARK 'instr(exStr, ">") returns 7 'Mid(" <Head>data</Head> ", 7+1,...

vbscript • Strings

typealias for closures with parameters

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...

Swift Language • Typealias

typealias for other types

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...

Swift Language • Typealias

Listing currently running queries

The following command lists out the queries that are currently being run on the server db.currentOp() The output looks something similar to this { "inprog" : [ { "opid" : "302616759", "active" : true, &...

MongoDB • Managing MongoDB

In C++11 and later

C++11 offers tools that enhance the functionality of RAII-encapsulated OpenGL objects. Without C++11 features like move semantics, such objects would have to be dynamically allocated if you want to pass them around, since they cannot be copied. Move support allows them to be passed back and forth li...

opengl • Encapsulating OpenGL objects with C++ RAII

Using PermissionUtil

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...

Android • Runtime Permissions in API-23 +

Removing features with zero or near-zero variance

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...

R Language • Feature Selection in R -- Removing Extraneous Features

Removing features with high numbers of NA

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 ...

R Language • Feature Selection in R -- Removing Extraneous Features

Create default user

Create groovy file by path $JENKINS_HOME/init.groovy.d/basic-security.groovy In Ubuntu 16 Jenkins home directory places in /var/lib/jenkins Place in file next code #!groovy import jenkins.model.* import hudson.security.* def instance = Jenkins.getInstance() def hudsonRealm = new...

jenkins • Jenkins Groovy Scripting

Merging selections

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...

d3.js • update pattern