Tutorial by Examples: s

Most of the tools are standardized with the exception of the name of the operator to throw an error. In Adobe interpreters, it is called .error. In ghostscript, it is called signalerror. So with this line you can use signalerror in postscript code for Adobe interpreters or ghostscript or xpost. /.e...

This snippet implements a procedure which behaves like a postscript looping operator. If the user proc calls exit, it catches the invalidexit error to fix the dictstack for the end at the end. Any other error except invalidexit is re-thrown by calling stop. % array n proc . - % Like `forall` but...

The documentation for docker events provides details, but when debugging it may be useful to launch a container and be notified immediately of any related event: docker run... & docker events --filter 'container=$(docker ps -lq)' In docker ps -lq, the l stands for last, and the q for quiet. Th...

Tests are an excellent way to ensure stable, bug-free applications. They serve as an interactive documentation and allow to modify code without fear to break functionality. D provides a convenient and native syntax for unittest block as part of the D language. Anywhere in a D module unittest blocks ...

If -unittest flag is passed to the D compiler, it will run all unittest blocks. Often it is useful to let the compiler generate a stubbed main function. Using the compile & run wrapper rdmd, testing your D program gets as easy as: rdmd -main -unittest yourcode.d Of course you can also split ...

For templated code it is often useful to verify that for function attributes (e.g. @nogc are inferred correctly. To ensure this for a specific test and thus type the entire unittest can be annotated @safe @nogc pure nothrow unittest { import std.math; assert(exp(0) == 1); assert(l...

In the scenario that a controller throws an exception, we can define exception handler methods to build and return specific responses. It is important to note that the defined exception handlers within the given controller will only apply to exceptions that occur within that controller. @Controller...

We're going to build an application that stores POJOs in a database. The application uses Spring Data JPA to store and retrieve data in a relational database. Its most compelling feature is the ability to create repository implementations automatically, at runtime, from a repository interface. Main...

Hash function h() is an arbitrary function which mapped data x ∈ X of arbitrary size to value y ∈ Y of fixed size: y = h(x). Good hash functions have follows restrictions: hash functions behave likes uniform distribution hash functions is deterministic. h(x) should always return the same v...

The replica set is a group of mongod instances that maintain the same data set. This example shows how to configure a replica set with three instances on the same server. Creating data folders mkdir /srv/mongodb/data/rs0-0 mkdir /srv/mongodb/data/rs0-1 mkdir /srv/mongodb/data/rs0-2 Starting ...

We add three records to our collection test as: > db.test.insert({"key":"value1","key2":"Val2","key3":"val3"}) WriteResult({ "nInserted" : 1 }) > db.test.insert({"key":"value2","key2":"V...

Component definition ko.components.register('progress-bar', { viewModel: function(params) { var that = this; // progress is a numeric value between 0 and 100 that.progress = params.progress; that.progressPercentual = ko.computed...

AngularJS code for dynamic classes: <p ng-class="{ highlighted: scopeVariableX, 'has-error': scopeVariableY }">Text.</p> KnockoutJS equivalent: <p data-bind="css: { highlighted: scopeObservableX, 'has-error': scopeObservableY }">Text.</p>

build.gradle repositories { maven { url 'http://4thline.org/m2' } } dependencies { // Cling compile 'org.fourthline.cling:cling-support:2.1.0' //Other dependencies required by Cling compile 'org.eclipse.jetty:jetty-server:8.1.18.v20150929' compile 'org.eclipse.jetty:jetty-servlet:8....

As an alternative to using Html.ActionLink to generate links in a view, you can use Html.RouteLink To make use of this feature, you need to configure a route, for example: public static void RegisterRoutes(RouteCollection routes) { routes.MapRoute( "SearchResults", "{...

After you got the Location object from FusedAPI, you can easily acquire Address information from that object. private Address getCountryInfo(Location location) { Address address = null; Geocoder geocoder = new Geocoder(getActivity(), Locale.getDefault()); String errorMessage; Li...

If you do deployments, configure your applications on multiple servers and required to login to your servers and make some changes in infrastructure, applications, pre-requisits etc. then puppet can definitely help you. Except all this if you handle a big infrastructure and want a centralized manag...

Before you decide to work on puppet there are few things that you need to know. puppet work in both client-server architecture (widely used) as well single machine (specially for testing purpose) puppet master can only be configured on a linux machine (master machine/node), windows can b...

System Requirements However, the Puppet master service is fairly resource intensive, and should be installed on a robust dedicated server. At a minimum, your Puppet master server should have two processor cores and at least 1 GB of RAM. To comfortably serve at least 1,000 nodes, it should have ...

# This is an example of a .profile or .bash_profile for Linux and Mac systems export GOPATH=/home/user/go export PATH=$PATH:/usr/local/go/bin