Tutorial by Examples: r

Most debugging happens in the terminal or in the Chrome or Safari develop tools, which are plenty sophisticated enough for 99% of your needs. However, if you want to debug on Firefox or need extra server debugging functionality, there are a few extra utilities you can use. Firefox - Firebug Nod...

A release manifest is similar to an NPM package.json file, in that it's primary concern is specify a list of Atmosphere packages, and providing a bit of metadata about that list of packages. The basic format looks like this: { "track":"distroname:METEOR", "version&qu...

If you need to extend the meteor tool or the command line, you'll need to create and publish your own meteor-tool package. Ronen's documentation is the best out there for this process: http://practicalmeteor.com/using-meteor-publish-release-to-extend-the-meteor-command-line-tool/1 It's easy to get...

StarryNight contains a small utility that parses an application's .meteor/versions file, and converts it into a Release Manifest. npm install -g starrynight cd myapp starrynight generate-release-json If you don't wish to use StarryNight, simply copy the contents of your .meteor/versions file i...

meteor show --ejson [email protected]

meteor publish-release --from-checkout

When building a custom release track, it's common to keep packages in the /packages directory as git submodules. The following command allows you to fetch all of the latest commits for the submodules in your /packages directory at the same time. git submodule foreach git pull origin master

The following example creates a Bootstrap Drop-Down menu, using only Blaze and no JQuery. Document Object Model <nav class="nav navbar-nav"> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="drop...

A very common task is to create responsive navbars and to create action/footer bars that have different controls based on what page a user is on, or what role a user belongs to. Lets go over how to make these controls. Router Router.configure({ layoutTemplate: 'appLayout', }); Router.route('c...

Alerts and errors are nearly the simplest of all Meteor component patterns. They're so simple, in fact, that they barely register as a pattern in of themselves. Instead of adding FlashAlert modules or patterns, all you really need to do is style a Handlebar template appropriate, add a helper, and wi...

Document Object Model Start by creating your tabs and panes in your Object Model... <template name="samplePage"> <div id="samplePage" class="page"> <ul class="nav nav-tabs"> <li id="firstPanelTab"><a href=&...

Dynamic Proxies do not really have much to do with Reflection but they are part of the API. It's basically a way to create a dynamic implementation of an interface. This could be helpful when creating mockup services. A Dynamic Proxy is an instance of an interface that is created with a so-called in...

Install Chrome by first considering which version to use, relevant if you are going to be doing Web Development: Google Chrome releases major versions about every 6 weeks and provides access to multiple versions of the product as they are being stabilized. This process is done in a series of channe...

Getting installed on Windows 10 is as easy as it's ever been, and despite (true) rumours flying around regarding Windows 10 being the last 'normal' version of Windows, it has and always will stay the same process. Installing a new version Get the windows image (Go straight to step 4 if you have ...

For efficiency, Prolog code is typically compiled to abstract machine code before it is run. Many different abstract machine architectures and variants have been proposed for efficient execution of Prolog programs. These include: WAM, the Warren Abstract Machine TOAM, an abstract machine used i...

As long as you have an internet connection, you can read images from an hyperlink I=imread('https://cdn.sstatic.net/Sites/stackoverflow/company/img/logos/so/so-logo.png');

In this example we illustrate how to take a double real-type 3D matrix from MATLAB, and pass it to a C double* array. The main objectives of this example are showing how to obtain data from MATLAB MEX arrays and to highlight some small details in matrix storage and handling. matrixIn.cpp #include...

To retreive the screens width and height in pixels, we can make use of the WindowManagers display metrics. // Get display metrics DisplayMetrics metrics = new DisplayMetrics(); context.getWindowManager().getDefaultDisplay().getMetrics(metrics); These DisplayMetrics hold a series of informatio...

To get the screens density, we also can make use of the Windowmanagers DisplayMetrics. This is a quick example: // Get density in dpi DisplayMetrics metrics = new DisplayMetrics(); context.getWindowManager().getDefaultDisplay().getMetrics(metrics); int densityInDpi = metrics.densityDpi;

Generally, if we want to remove an element from an array, we need to know it's index so that we can remove it easily using remove(at:) function. But what if we don't know the index but we know the value of element to be removed! So here is the simple extension to an array which will allow us to re...