Tutorial by Examples: st

A simple if statement: if a == b { // do something } Note that there are no parentheses surrounding the condition and that the opening curly brace { must be on the same line. The following will not compile: if a == b { // do something } An if statement making use of else: if...

You can add wildcards in string resources and populate them at runtime: Edit strings.xml <string name="my_string">This is %1$s</string> Format string as needed String fun = "fun"; context.getString(R.string.my_string, fun);

For full description of patterns, see SimpleDateFormat reference Date now = new Date(); long timestamp = now.getTime(); SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy", Locale.US); String dateStr = sdf.format(timestamp);

The return statement can be used to exit function and subroutine. Unlike many other programming languages it is not used to set the return value. real function f(x) real, intent(in) :: x integer :: i f = x do i = 1, 10 f = sqrt(f) - 1.0 if (f < 0) then f = -1...

There are a couple ways you can reverse a string to make it backwards. StringBuilder/StringBuffer: String code = "code"; System.out.println(code); StringBuilder sb = new StringBuilder(code); code = sb.reverse().toString(); System.out.println(code); Char array: S...

public async Task<Product> GetProductAsync(string productId) { using (_db) { return await _db.QueryFirstOrDefaultAsync<Product>("usp_GetProduct", new { id = productId }, commandType: CommandType.StoredProcedure); } }

One can iterate over a list using ~{ and ~} directives. CL-USER> (format t "~{~a, ~}~%" '(1 2 3 4 5)) 1, 2, 3, 4, 5, ~^ can be used to escape if there are no more elements left. CL-USER> (format t "~{~a~^, ~}~%" '(1 2 3 4 5)) 1, 2, 3, 4, 5 A numeric argument can ...

You can make an UILabel with a dynamic height using auto layout. You need to set the numberOfLines to zero (0), and add a minimal height by setting up a constraints with a relation of type .GreaterThanOrEqual on the .Height attribute iOS 6 Swift label.numberOfLines = 0 let heightConstraint = ...

Assumptions: An Oracle JDK has been installed. The JDK was installed to the default directory. Setup steps Open Windows Explorer. In the navigation pane on the left right click on This PC (or Computer for older Windows versions). There is a shorter way without using the explorer in...

You can use the reversed function which returns an iterator to the reversed list: In [3]: rev = reversed(numbers) In [4]: rev Out[4]: [9, 8, 7, 6, 5, 4, 3, 2, 1] Note that the list "numbers" remains unchanged by this operation, and remains in the same order it was originally. To r...

Good for quick notifications that don't require interaction. Swift let alert = UIAlertController(title: "Toast", message: "Hello World", preferredStyle: .Alert) presentViewController(alert, animated: true) { let delay_s:Double = 2 let delayTime = dispatch_time(DI...

In general, most of the objects you would interact with as a user would tend to be a vector; e.g numeric vector, logical vector. These objects can only take in a single type of variable (a numeric vector can only have numbers inside it). A list would be able to store any type variable in it, making...

# example data test_sentences <- c("The quick brown fox quickly", "jumps over the lazy dog") Let's make the brown fox red: sub("brown","red", test_sentences) #[1] "The quick red fox quickly" "jumps over the lazy dog" Now, ...

Head over to CMake download page and get a binary for your operating system, e.g. Windows, Linux, or Mac OS X. On Windows double click the binary to install. On Linux run the binary from a terminal. On Linux, you can also install the packages from the distribution's package manager. On Ubuntu 16.0...

LibGDX has a fairly simple setup, with the help of a simple Java program. You can find the download here. When you startup the application, it will look something like this: Note: This screenshot have been taken on Linux and shows path that differs from a Windows installation. However, the form is...

Combining typedef with struct can make code clearer. For example: typedef struct { int x, y; } Point; as opposed to: struct Point { int x, y; }; could be declared as: Point point; instead of: struct Point point; Even better is to use the following typedef struct Poin...

The emptiness of a list is associated to the boolean False, so you don't have to check len(lst) == 0, but just lst or not lst lst = [] if not lst: print("list is empty") # Output: list is empty

This example assumes you have already installed Java and Gradle. Use the following project structure: src/ main/ java/ com/ example/ Application.java build.gradle build.gradle is your build script for Gradle build system with the following content: buildscri...

You can add items to a user's Reading List in Safari by calling the addItem method on the SSReadingList singleton. let readingList = SSReadingList.default() readingList?.addItem(with: yourURL, title: "optional title", previewText: "optional preview text") The default Reading...

Say you have a library website, and you want to have a custom post type named Books. It can be registered as function create_bookposttype() { $args = array( 'public' => true, 'labels' => array( 'name' => __( 'Books' ), 'singular_name' => ...