Tutorial by Examples: p

Updating the elements in the JSON

sample json to update { "student":{"name":"Rahul", "lastname":"sharma"}, "marks":{"maths":"88"} } To update the elements value in the json we need to assign the value and update. try { // Create a new in...

Android • JSON in Android with org.json

Compute Cryptographic Hashes

To compute the hashes of relatively small blocks of data using different algorithms: final MessageDigest md5 = MessageDigest.getInstance("MD5"); final MessageDigest sha1 = MessageDigest.getInstance("SHA-1"); final MessageDigest sha256 = MessageDigest.getInstance("SHA-256&...

Java Language • Security & Cryptography

Migration Steps

parse.com • Migration Guide

The simplest Options page

if( function_exists('acf_add_options_page') ) { acf_add_options_page(); } Add the above code to functions.php and an options page named 'Options' will appear in your Wordpress admin area. You now need to asign some custom fields to the page.

advanced-custom-fields • Custom Options page

Advanced Options page

if( function_exists('acf_add_options_page') ) { acf_add_options_page(array( 'page_title' => 'Theme General Settings', 'menu_title' => 'Theme Settings', 'menu_slug' => 'theme-general-settings', 'capability' => 'edit_posts', ...

advanced-custom-fields • Custom Options page

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

Installation or Setup

Performance testing is a subject/process/testing methodology but not a tool to setup. It includes the following core activities: Identify Test Environment Identify Performance Acceptance Criteria Plan and Design Tests Configure Test Environment Implement Test Design Execute Tests Analyze, ...

performance-testing • Getting started with performance-testing

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

Sanitize get_field() output

It's a good idea to sanitize get_field() output, especially when using Advanced Custom Fields fields front end (with acf_form()). Otherwise your site is likely vulnerable to cross-site scripting attacks (XSS). The following function lets you use echo get_field_escaped('my_custom_field', $post_id, ...

advanced-custom-fields • get_field()

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

Rabin Karp

The Rabin–Karp algorithm or Karp–Rabin algorithm is a string searching algorithm that uses hashing to find any one of a set of pattern strings in a text.Its average and best case running time is O(n+m) in space O(p), but its worst-case time is O(nm) where n is the length of the text and m is the le...

algorithm • Searching

C# Implementation

public class LongestIncreasingSubsequence { private static int Lis(int[] input, int n) { int[] lis = new int[n]; int max = 0; for(int i = 0; i < n; i++) { lis[i] = 1; } for (int i = 1; i < n; i++) { ...

algorithm • Longest Increasing Subsequence

Sample AJAX request w/ binding

Page.html <div data-bind="foreach: blogs"> <br /> <span data-bind="text: entryPostedDate"></span> <br /> <h3> <a data-bind="attr: { href: blogEntryLink }, text: title"></a> </h3> ...

knockout.js • AJAX requests and binding

Pan, zoom, and rotate with QGraphicsView

QGraphics can be used to organize complicated scenes of visual objects into a framework that makes them easier to handle. There are three major types of objects used in this framework QGraphicsView, QGraphicsScene, and QGraphicsItems. QGraphicsItems are the basic visual items that exist in the scen...

Qt • QGraphics

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

2. String Manipulation Basics

'Base string Dim exStr : exStr = " <Head>data</Head> " 'Left Dim res: res = Left(exStr,6) 'res now equals " <Head" 'Right Dim res: res = Right(exStr,6) 'res now equals "Head> " 'Mid Dim res: res = Mid(exStr,8,4) 'res now equals "data&quot...

vbscript • Strings

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

createDissolvedGDB to create a file gdb on the workspace

def createDissolvedGDB(workspace, gdbName): gdb_name = workspace + "/" + gdbName + ".gdb" if(arcpy.Exists(gdb_name): arcpy.Delete_management(gdb_name) arcpy.CreateFileGDB_management(workspace, gdbName, "") else: arcpy.CreateFi...

Python Language • ArcPy