Tutorial by Examples: ar

ARC can be disabled for individual files by adding the -fno-objc-arc compiler flag for each file. Conversely it can be added in Targets ▸ Build Phases ▸ Compile Sources

All parameters specified after the first asterisk in the function signature are keyword-only. def f(*a, b): pass f(1, 2, 3) # TypeError: f() missing 1 required keyword-only argument: 'b' In Python 3 it's possible to put a single asterisk in the function signature to ensure that the rema...

On calling, an application chooser dialog will appear and by selecting an application you can share your content with it. For calling use this line of code in your program class: share(context, "This is a test message", "Test Subject") Function's definition: public static v...

Once you have setup the Retrofit environment in your project, you can use the following example that demonstrates how to upload multiple files using Retrofit: private void mulipleFileUploadFile(Uri[] fileUri) { OkHttpClient okHttpClient = new OkHttpClient(); OkHttpClient clientWith30sTime...

The Java Native Interface (JNI) allows you to call native functions from Java code, and vice versa. This example shows how to load and call a native function via JNI, it does not go into accessing Java methods and fields from native code using JNI functions. Suppose you have a native library named ...

Passing an object to the data property when registering a component would cause all instances of the component to point to the same data. To solve this, we need to return data from a function. var CustomComponent = Vue.extend({ data: function () { return { a: 1 } } })

You can create partial files that contain smaller snippets of your stylesheets. This allows you to modularize your CSS and allows for better structure of your stylesheets. A partial is a Sass file named with a leading underscore, i.e: _partial.scss. The underscore lets Sass know that the specific fi...

The Lua standard library provides two iterator functions that can be used with a for loop to traverse key-value pairs within tables. To iterate over a sequence table we can use the library function ipairs. for index, value in ipairs {'a', 'b', 'c', 'd', 'e'} do print(index, value) --> 1 a, ...

The C programming language allows multidimensional arrays. Here is the general form of a multidimensional array declaration − type name[size1][size2]...[sizeN]; For example, the following declaration creates a three dimensional (5 x 10 x 4) integer array: int arr[5][10][4]; Two-dimensional A...

Step by Step Guide :- Step 1 :- Set constraint to UIView Leading. 2) Top. 3) Trailing. (From mainview) Step 2 :- Set constrain to Label 1 Leading 2) Top 3) Trailing (From it's superview) Step 3 :- Set constraint to Label 2 Leading 2) Top 3) Trailing (From its superview) Step...

This example intend to be a gentle introduction to the Excel Object Model for beginners. Open the Visual Basic Editor (VBE) Click View --> Immediate Window to open the Immediate Window (or ctrl + G): You should see the following Immediate Window at the bottom on VBE: This wi...

Suppose we have a JSON string： ["first","second","third"] We can parse this JSON string into a String array : Gson gson = new Gson(); String jsonArray = "[\"first\",\"second\",\"third\"]"; String[] strings = gson.fromJson(j...

--- person_table: - &person001 fname: homer lname: simpson role: dad age: 33 - &person002 fname: marge lname: simpson role: mom age: 34 - &person003 fname: pe...

add: add the specified files on the next commit addremove: add all new files, delete all missing files backout: reverse effect of earlier changeset commit, ci: commit the specified files or all outstanding changes copy, cp: mark files as copied for the next commit forge...

bookmarks, bookmark: create a new bookmark or list existing bookmarks branch: set or show the current branch name branches: list repository named branches config, showconfig, debugconfig: show combined config settings from all hgrc files files: list tracked files help: show help for a given t...

In case of stackable modification, Scala arranges classes and traits in a linear order to determine method call hierarchy, which is known as linearization. The linearization rule is used only for those methods that involve method invocation via super(). Let's consider this by an example: class Shap...

C++14 Parameter pack unpacking traditionally requires writing a helper function for each time you want to do it. In this toy example: template<std::size_t...Is> void print_indexes( std::index_sequence<Is...> ) { using discard=int[]; (void)discard{0,((void)( std::cout <&...

<svg width="400px" height="200px"> <text x="1em, 2em, 3em, 4em, 5em" y="3em, 4em, 5em"> Individually Spaced Text </text> </svg> The Text element supports individual placement of letters by accepting an array of values for...

This example is not tied to any concrete GUI toolkit, like reactive-banana-wx does, for instance. Instead it shows how to inject arbitary IO actions into FRP machinery. The Control.Event.Handler module provides an addHandler function which creates a pair of AddHandler a and a -> IO () values. Th...

The Collection object implements the ArrayAccess and IteratorAggregate interface, allowing it to be used like an array. Access collection element: $collection = collect([1, 2, 3]); $result = $collection[1]; Result: 2 Assign new element: $collection = collect([1, 2, 3]); $collection[] = ...