count() will return the number of times and element appears in an array. In the following example we see that the value 3 occurs twice.
my_array = array('i', [1,2,3,3,5])
my_array.count(3)
# 2
When you need a Python list object, you can utilize the tolist() method to convert your array to a list.
my_array = array('i', [1,2,3,4,5])
c = my_array.tolist()
# [1, 2, 3, 4, 5]
You are able to append a string to a character array using fromstring()
my_char_array = array('c', ['g','e','e','k'])
my_char_array.fromstring("stuff")
print(my_char_array)
#array('c', 'geekstuff')
Sometimes, if an action should be bind to a collection view's cell selection, you have to implement the UICollectionViewDelegate protocol.
Let's say the collection view is inside a UIViewController MyViewController.
Objective-C
In your MyViewController.h declares that it implements the UICollecti...
Provided that barButtonItem has a non-null image property (e.g. set in the Interface Builder).
Objective-C
barButtonItem.image = [barButtonItem.image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context
Context is important if you ship your class for others to use.Context lets your class observer verify that its you observer which is being called.
The ...
If you are using library that contains (for example) AwesomeViewController with a wrong status bar color you can try this:
let awesomeViewController = AwesomeViewController()
awesomeViewController.navigationBar.barStyle = .blackTranslucent // or other style
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An interface is declared like a class, but without access modifiers (public, private, ...). Also, no definitions are allowed, so variables and constants can't be used.
Interfaces should always have an Unique Identifier, which can be generated by pressing Ctrl + Shift + G.
IRepository = interface
...
Classes can implement more than one interface, as opposed to inheriting from more than one class (Multiple Inheritance) which isn't possible for Delphi classes. To achieve this, the name of all interfaces must be added comma-separated behind the base class.
Of course, the implementing class must al...
Interfaces can inherit from each other, exactly like classes do, too. An implementing class thus has to implement functions of the interface and all base interfaces. This way, however, the compiler doesn't know that the implenting class also implements the base interface, it only knows of the interf...
Since the declaration of variables in interfaces isn't possible, the "fast" way of defining properites (property Value: TObject read FValue write FValue;) can't be used. Instead, the Getter and setter (each only if needed) have to be declared in the interface, too.
IInterface = interface(...
Get a list of all jobs in the current session:
Get-Job
Waiting on a job to finish before getting the result:
$job | Wait-job | Receive-Job
Timeout a job if it runs too long (10 seconds in this example)
$job | Wait-job -Timeout 10
Stopping a job (completes all tasks that are pending in t...
When using the DllImport attribute you have to know the correct dll and method name at compile time. If you want to be more flexible and decide at runtime which dll and methods to load, you can use the Windows API methods LoadLibrary(), GetProcAddress() and FreeLibrary(). This can be helpful if the ...
First obtain the Microsoft.CodeAnalysis.CSharp.Workspaces nuget before continuing.
var workspace = Microsoft.CodeAnalysis.MSBuild.MSBuildWorkspace.Create();
var project = await workspace.OpenProjectAsync(projectFilePath);
var compilation = await project.GetCompilationAsync();
foreach (var diag...
Name-based virtual hosting on Apache is described on the Apache website as such:
With name-based virtual hosting, the server relies on the client to
report the hostname as part of the HTTP headers. Using this technique,
many different hosts can share the same IP address.
Therefore, more than...
Add this to your $MYVIMRC:
" Source vim configuration file whenever it is saved
if has ('autocmd') " Remain compatible with earlier versions
augroup Reload_Vimrc " Group name. Always use a unique name!
autocmd! " Clear any preexisting autoc...
