Tutorial by Examples: p

A named publication is one that possesses a name and needs to be explicitly subscribed to from the client. Consider this server side code: Meteor.publish('somePublication', function() { return SomeCollection.find() }) The client needs to request it by: Meteor.subscribe('somePublication') ...

Meteor's default templating system Spacebars and its underlying rendering subsystem Blaze integrate seemlessly with publication lifecycle methods such that a simple piece of template code can subscribe to its own data, stop and clean up its own traces during the template tear down. In order to tap ...

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" <!-- etc --> > <!-- Internet is required. READ_LOGS are to ensure that the Logcat is transmitted--> <uses-perm...

Reactive Extensions are published on both NuGet and MyGet. Installing and using them is therefore the same as any other NuGet package: Install-Package System.Reactive NB package names changed between v2 and v3. See the README on Github for more info Breaking changes The NuGet packages have...

This will show the user location on the map Objective-C [self.map setShowsUserLocation:YES]; Swift self.map?.showsUserLocation = true This will track the user location on the map, updating regions according Objective-C [self.map setUserTrackingMode:MKUserTrackingModeFollow]; Swift s...

views.py: from django.http import HttpResponse from django.views.generic import View class MyView(View): def get(self, request): # <view logic> return HttpResponse('result') urls.py: from django.conf.urls import url from myapp.views import MyView urlpatterns...

Adding properties If you'd like to add properties to an existing object, you can use the Add-Member cmdlet. With PSObjects, values are kept in a type of "Note Properties" $object = New-Object -TypeName PSObject -Property @{ Name = $env:username ID = 12 Address...

A simple way of selecting between functions at compile time is to dispatch a function to an overloaded pair of functions that take a tag as one (usually the last) argument. For example, to implement std::advance(), we can dispatch on the iterator category: namespace details { template <clas...

Using the Android API 23 or higher, very often such situation can be seen: This situation is caused by the structural change of the Android API regarding getting the resources. Now the function: public int getColor(@ColorRes int id, @Nullable Theme theme) throws NotFoundException should...

git diff myfile.txt Shows the changes between the previous commit of the specified file (myfile.txt) and the locally-modified version that has not yet been staged. This also works for directories: git diff documentation The above shows the changes between the previous commit of all files in ...

Suppose you have a Dockerfile ending with ENTRYPOINT [ "nethogs"] CMD ["wlan0"] if you build this image with a docker built -t inspector . launch the image built with such a Dockerfile with a command such as docker run -it --net=host --rm inspector ,nethogs will monitor the...

To temporarily mark a file as ignored (pass file as parameter to alias) - type: unwatch = update-index --assume-unchanged To start tracking file again - type: watch = update-index --no-assume-unchanged To list all files that has been temporarily ignored - type: unwatched = "!git ls-fil...

We plot a simple scatter plot using the builtin iris data set as follows: library(ggplot2) ggplot(iris, aes(x = Petal.Width, y = Petal.Length, color = Species)) + geom_point() This gives:

There are different cases where you must Explicitly specify the type parameters for a generic method. In both of the below cases, the compiler is not able to infer all of the type parameters from the specified method parameters. One case is when there are no parameters: public void SomeMethod<T...

Pattern matching can be useful to handle Options: let result = Some("Hello World") match result with | Some(message) -> printfn message | None -> printfn "Not feeling talkative huh?"

You can get an specific information from a container by running: docker inspect -f '<format>' <container> For instance, you can get the Network Settings by running: docker inspect -f '{{ .NetworkSettings }}' <container> You can also get just the IP address: docker inspect ...

Sometimes you need rewrite history with a rebase, but git push complains about doing so because you rewrote history. This can be solved with a git push --force, but consider git push --force-with-lease, indicating that you want the push to fail if the local remote-tracking branch differs from the b...

Compiling C programs requires you to work with five kinds of files: Source files: These files contain function definitions, and have names which end in .c by convention. Note: .cc and .cpp are C++ files; not C files. e.g., foo.c Header files: These files contain function prototypes and va...

Before the C compiler starts compiling a source code file, the file is processed in a preprocessing phase. This phase can be done by a separate program or be completely integrated in one executable. In any case, it is invoked automatically by the compiler before compilation proper begins. The prepro...

After the C pre-processor has included all the header files and expanded all macros, the compiler can compile the program. It does this by turning the C source code into an object code file, which is a file ending in .o which contains the binary version of the source code. Object code is not directl...