Tutorial by Examples: re

Relationship between Hibernate and JPA

Hibernate is an implementation of the JPA standard. As such, everything said there is also true for Hibernate. Hibernate has some extensions to JPA. Also, the way to set up a JPA provider is provider-specific. This documentation section should only contain what is specific to Hibernate.

hibernate • Hibernate and JPA

Manual creating JSON

import play.libs.Json; public JsonNode createJson() { // {"id": 33, "values": [3, 4, 5]} ObjectNode rootNode = Json.newObject(); ArrayNode listNode = Json.newArray(); long values[] = {3, 4, 5}; for (long val: values) { listNode.add(val); ...

playframework • Java - Working with JSON

Using different Properties/Configuration for different environments like dev, qa, staging etc.

Large scale applications often need different properties when running on different environments. we can achieve this by passing arguments to NodeJs application and using same argument in node process to load specific environment property file. Suppose we have two property files for different enviro...

Node.js • Deploying Node.js applications in production

Compress files and folders using the tar command

Use the tar (tape archive) command to compress your files and folders. It is similar to creating .ZIP files in Windows environment. Syntax: tar -zcvf <output tar file> <source file> Example: tar -zcvf outputfile.tar.gz source file Here’s what those switches actually mean: -c: Cr...

Ubuntu • Basic Terminal commands

Create an inbound filter for the search

Inbound filter is applied when item is added to the search index and allows to specify whether item is included to the index or not. Examples when inbound filter can be used - do not include standard values and previous versions of the item in the index. Inbound filters are set in configuration: ...

sitecore • Search

Create an outbound filter for the search

Outbound filter can be used to filter the search results. One of the examples of outbound filter usage is removing items which user doesn't have access to from search results. Outbound filters are set in the configuration: <indexing.filterIndex.outbound> <processor type="Sitecore....

sitecore • Search

Delete all previous versions of the item in the index when adding new version

By default Sitecore adds all versions of the item to the sitecore_master_index. The drawback of that is that if users are using workflows and adding lots of versions all of them will be added to the search results in the content editor. Configuration: <event name="item:versionAdded" &...

sitecore • Search

Navigate with HttpRequestMessage

Set custom user agent and navigate to Uri: var userAgent = "my custom user agent"; var uri = new Uri("http://useragentstring.com/"); var requestMessage = new HttpRequestMessage(HttpMethod.Get, uri); requestMessage.Headers.Add("User-Agent", userAgent); this.webVie...

uwp • WebView navigation

NavigateToLocalStreamUri

In case when NavigateToString can't handle some content, use NavigateToLocalStreamUri method. It will force every locally-referenced URI inside the HTML page to call to the special resolver class, which can provide right content on the fly. Assets/Html/html-sample.html file: <!DOCTYPE html> ...

uwp • WebView navigation

Indent an entire file using built-in indentention engine

In command mode(Esc) enter :gg=G to use Vim's built-in indention engine. Command PartDescriptionggstart of file=indent (when equalprg is empty)Gend of file You can set equalprg in your .vimrc to use a more sophisticated auto-formatting tool. For example, to use clang-format for C/C++ put the foll...

vim • Indentation

The importance of preallocation

Arrays in MATLAB are held as continuous blocks in memory, allocated and released automatically by MATLAB. MATLAB hides memory management operations such as resizing of an array behind easy to use syntax: a = 1:4 a = 1 2 3 4 a(5) = 10 % or alternatively a = [a, 10] a = ...

MATLAB Language • Performance and Benchmarking

Evaluated Expression

ASP.NET • Expressions

Reading files: foreach vs. while

When reading a potentially large file, a while loop has a significant memory advantage over foreach. The following will read the file record by record (by default, "record" means "a line", as specified by $/), assigning each one to $_ as it is read: while(<$fh>) { pri...

Perl Language • Memory usage optimization

Installation on Amazon Linux from git repo

Amazon Linux is a RHEL variant, so the Red Hat instructions should work for the most part. There is, however, at least one discrepancy. There was an instance where the python27-devel package, as opposed to python-devel, was explicitly necessary. Here, we will install from source. sudo yum -y upd...

ansible • Installation

Creating an Connection to other Excel Files to query

There are many fine ways to get this done, which others have already suggested. Following along the "get Excel data via SQL track", here are some pointers. Excel has the "Data Connection Wizard" which allows you to import or link from another data source or even within the very ...

excel • Create Connection to other Excel Files

Creating Requests

php artisan make:request StoreUserRequest php artisan make:request UpdateUserRequest Note: You can also consider using names like StoreUser or UpdateUser (without Request appendix) since your FormRequests are placed in folder app/Http/Requests/.

Laravel • Form Request(s)

Verifying a Returned Value

[Test] public void Calculator_Add_ReturnsSumOfTwoNumbers() { Calculator calculatorUnderTest = new Calculator(); double result = calculatorUnderTest.Add(2, 3); Assert.AreEqual(5, result); }

unit-testing • Assertion Types

Binding Registration

Cusom bindings should be registered by extending the current knockout bindingHandlers object.This is done by adding a new property to the object. ko.bindingHandlers.newBinding = { init: function(element, valueAccessor, allBindings, viewModel, bindingContext) { }, update: function(e...

knockout.js • Custom Bindings

Dev and Prod environment using different datasources

After succesfully setup Spring-Boot application all the configuration is handled in an application.properties file. You will find the file at src/main/resources/. Normally there is a need to have a database behind the application. For development its good to have a setup of dev and a prod environme...

spring-boot • Create and Use of multiple application.properties files

Application of `ReplaceAll` and `ReplaceRepeated`

Example of how ReplaceAll only applies a rule at most once, while ReplaceRepeated will do so in a loop but always restart application from the first rule. x + a /. { a_ + z :> (Print[0]; DoneA), a_ + x :> (Print[1]; y + z), a_ + y :> (Print[2]; DoneB)} (* Prints "1&quot...

wolfram-mathematica • Evaluation Order