Tutorial by Examples: ros

Introduction NMAKE is a command-line utility developed by Microsoft to be used primarily in conjunction with Microsoft Visual Studio and/or the Visual C++ command line tools. NMAKE is build system that falls under the Make family of build systems, but has certain distinct features that diverge fro...

#import <Foundation/Foundation.h> int main() { NSLog(@"File :%s\n", __FILE__ ); NSLog(@"Date :%s\n", __DATE__ ); NSLog(@"Time :%s\n", __TIME__ ); NSLog(@"Line :%d\n", __LINE__ ); NSLog(@"ANSI :%d\n", __STDC__ ); ...

Assuming a workspace named workspace_name has been previously created in the home directory, a package named package_name can be created by executing the following command lines. $ cd ~/workspace_name/src/ $ catkin_create_pkg package_name rospy

Lets have a look at the native app lifecycle methods for different platforms. Android. //Xamarin.Forms.Platform.Android.FormsApplicationActivity lifecycle methods: protected override void OnCreate(Bundle savedInstanceState); protected override void OnDestroy(); protected override void OnPause()...

In our last two examples, numpy assumed that a[0,:] was the first vector, a[1,:] the second, and a[2,:] the third. Numpy.cross has an optional argument axisa that allows us to specify which axis defines the vectors. So, >>> a=np.array([[1,1,1],[0,1,0],[1,0,-1]]) >>> b=np.array([0...

When a method is defined to be a macro, the compiler takes the code that is passed as its argument and turns it into an AST. It then invokes the macro implementation with that AST, and it returns a new AST that is then spliced back to its call site. import reflect.macros.blackbox.Context object ...

Macros can trigger compiler warnings and errors through the use of their Context. Say we're a particularly overzealous when it comes to bad code, and we want to mark every instance of technical debt with a compiler info message (let's not think about how bad this idea is). We can use a macro that d...

Lets following are the class definition class A def a; end end module B def b; end end class C < A include B def c; end end What are the instance methods of C? C.instance_methods # [:c, :b, :a, :to_json, :instance_of?...] What are the instance methods that declare...

A number of the demonstration macros within this part requires a function which I will explain later. For the moment, please just copy GetFldrNames() to a suitable module. I use this function frequently and keep it, and other like it that I use in many different macros, in a module named “ModGloba...

K-fold cross-validation is a systematic process for repeating the train/test split procedure multiple times, in order to reduce the variance associated with a single trial of train/test split. You essentially split the entire dataset into K equal size "folds", and each fold is used once fo...

g + geom_bar(aes(x = cut, fill = color), position = "fill") + guides(fill = guide_legend(title = NULL))

#define kPaperSizeA4 CGSizeMake(595.2,841.8) First of all implement UIPrintPageRenderer protocol @interface UIPrintPageRenderer (PDF) - (NSData*) printToPDF; @end @implementation UIPrintPageRenderer (PDF) - (NSData*) printToPDF { NSMutableData *pdfData = [NSMutableData data]; ...

Sample Data: CREATE TABLE table_name ( id, list ) AS SELECT 1, 'a,b,c,d' FROM DUAL UNION ALL -- Multiple items in the list SELECT 2, 'e' FROM DUAL UNION ALL -- Single item in the list SELECT 3, NULL FROM DUAL UNION ALL -- NULL list SELECT 4, 'f,,g' FROM DUAL; -- NULL item...

// gets the Class objects from the net.mminecraft.server package with the given name public Class<?> getNmsClass(String name) throws ClassNotFoundException { // explode the Server interface implementation's package name into its components String[] packageArray = Bukkit.getServer()....

Consider the following situation: Imagine that you are the developer of a social media website that allows users to be friends with other users and that employs turbolinks to make page loading faster. In the top right of every page on the site, there is a number indicating the total number of friend...

IServiceCollection To start building an IOC container with Microsoft's DI nuget package you start with creating an IServiceCollection. You can use the already provided Collection: ServiceCollection: var services = new ServiceCollection(); This IServiceCollection is nothing more than an implemen...

it caused by your batch size too small, which lead to a lot of ROS Containers created and reach the limitation(1024 default). you should do defragment using TupleMover task(mergeout) before the error raised. To do troubleshooting: ROS Containers viewed from the projections. select * from STOR...

The window.postMessage() method together with its relative event handler window.onmessage can be safely used to enable cross-origin communication. The postMessage() method of the target window can be called to send a message to another window, which will be able to intercept it with its onmessage e...

The List interface is implemented by different classes. Each of them has its own way for implementing it with different strategies and providing different pros and cons. Classes implementing List These are all of the public classes in Java SE 8 that implement the java.util.List interface: Abs...

Another convenient solution for cross compilation is the usage of gox: https://github.com/mitchellh/gox Installation The installation is done very easily by executing go get github.com/mitchellh/gox. The resulting executable gets placed at Go's binary directory, e.g. /golang/bin or ~/golang/bin. E...