Tutorial by Examples: t

numpy.dot can be used to multiply a list of vectors by a matrix but the orientation of the vectors must be vertical so that a list of eight two component vectors appears like two eight components vectors: >>> a array([[ 1., 2.], [ 3., 1.]]) >>> b array([[ 1., 2., ...

filePath = "file.csv" data = np.genfromtxt(filePath) Many options are supported, see official documentation for full list: data = np.genfromtxt(filePath, dtype='float', delimiter=';', skip_header=1, usecols=(0,1,3) )

A nested loop is a loop within a loop, an inner loop within the body of an outer one. How this works is that the first pass of the outer loop triggers the inner loop, which executes to completion. Then the second pass of the outer loop triggers the inner loop again. This repeats until the outer loop...

With the bind command it is possible to define custom key bindings. The next example bind an Alt + w to >/dev/null 2>&1: bind '"\ew"':"\" >/dev/null 2>&1\"" If you want to execute the line immediately add \C-m (Enter) to it: bind '"\ew&quo...

When a Java virtual machine starts, it needs to know how big to make the Heap, and the default size for thread stacks. These can be specified using command-line options on the java command. For versions of Java prior to Java 8, you can also specify the size of the PermGen region of the Heap. Note...

Searching git log using some string in log: git log [options] --grep "search_string" Example: git log --all --grep "removed file" Will search for removed file string in all logs in all branches. Starting from git 2.4+, the search can be inverted using the --invert-grep...

Reading invalid UTF-8 When reading UTF-8 encoded data, it is important to be aware of the fact the UTF-8 encoded data can be invalid or malformed. Such data should usually not be accepted by your program (unless you know what you are doing). When unexpectedly encountering malformed data, different ...

The arrayref for @foo is \@foo. This is handy if you need to pass an array and other things to a subroutine. Passing @foo is like passing multiple scalars. But passing \@foo is a single scalar. Inside the subroutine: xyz(\@foo, 123); ... sub xyz { my ($arr, $etc) = @_; print $arr-&g...

Merges two collections (without removing duplicates) List<int> foo = new List<int> { 1, 2, 3 }; List<int> bar = new List<int> { 3, 4, 5 }; // Through Enumerable static class var result = Enumerable.Concat(foo, bar).ToList(); // 1,2,3,3,4,5 // Through extension method...

To unregister from Remote Notifications programatically you can use Objective-C [[UIApplication sharedApplication] unregisterForRemoteNotifications]; Swift UIApplication.sharedApplication().unregisterForRemoteNotifications() this is similar to going into the setting of your phone and manual...

Detailed instructions on getting api set up or installed.

NSMutableDictionary *attributesDictionary = [NSMutableDictionary dictionary]; [attributesDictionary setObject:[UIFont systemFontOfSize:14] forKey:NSFontAttributeName]; //[attributesDictionary setObject:[UIColor redColor] forKey:NSForegroundColorAttributeName]; NSMutableAttributedString *attri...

Task that return a value has return type of Task< TResult > where TResult is the type of value that needs to be returned. You can query the outcome of a Task by its Result property. Task<int> t = Task.Run(() => { int sum = 0; for(int i = 0; i < 500; i++) ...

To create a Swift Package, open a Terminal then create an empty folder: mkdir AwesomeProject cd AwesomeProject And init a Git repository: git init Then create the package itself. One could create the package structure manually but there's a simple way using the CLI command. If you want to ...

EventNetworks returned by compile must be actuated before reactimated events have an effect. main = do (inputHandler, inputFire) <- newAddHandler eventNetwork <- compile $ do inputEvent <- fromAddHandler inputHandler let inputEventReaction = fmap putStrLn inp...

Here we will be checking out the latest copy of our project's code, run the tests and will make the application live.To achieve that, follow below steps: Open Jenkins in browser. Click the New Job link. Enter project name and select the Build a free-style software project link. Click on Ok but...

Java EE stands for Java Enterprise Edition. Java EE extends the Java SE (which stands for Java Standard Edition). Java EE is a set of technologies and related specifications that are oriented towards the development of large-scale enterprise applications. Java EE is developed in a community driven p...

Since an enum can be cast to and from its underlying integral type, the value may fall outside the range of values given in the definition of the enum type. Although the below enum type DaysOfWeek only has 7 defined values, it can still hold any int value. public enum DaysOfWeek { Monday = 1...

From within Emacs, type C-h t (Control-h, t) to get an excellent interactive tutorial within Emacs. The user learns basic navigation and editing by operating on the TUTORIAL text itself, as they read the tutorial. (Modifications to the tutorial are discarded when the tutorial is closed, so each ti...

Validation attributes are used to enforce various validation rules in a declarative fashion on classes or class members. All validation attributes derive from the ValidationAttribute base class. Example: RequiredAttribute When validated through the ValidationAttribute.Validate method, this att...