Tutorial by Examples: e

This is a slightly more advanced example that shows a few more features of common lisp. We start with a simple Hello, World! function and demonstrate some interactive development at the REPL. Note that any text from a semicolon, ;, to the rest of the line is a comment. CL-USER> (defun hello () ...

if let Combines a pattern match and an if statement, and allows for brief non-exhaustive matches to be performed. if let Some(x) = option { do_something(x); } This is equivalent to: match option { Some(x) => do_something(x), _ => {}, } These blocks can also have e...

The standard doesn't specify if char should be signed or unsigned. Different compilers implement it differently, or might allow to change it using a command line switch.

The following types are defined as integral types: char Signed integer types Unsigned integer types char16_t and char32_t bool wchar_t With the exception of sizeof(char) / sizeof(signed char) / sizeof(unsigned char), which is split between § 3.9.1.1 [basic.fundamental/1] and § 5.3.3.1 [ex...

Background threads cannot modify the UI; almost all UIKit methods must be called on the main thread. From a subclass of NSObject (including any UIViewController or UIView): InvokeOnMainThread(() => { // Call UI methods here }); From a standard C# class: UIApplication.SharedApplicat...

A few modules in the standard library have been renamed: Old nameNew name_winregwinregConfigParserconfigparsercopy_regcopyregQueuequeueSocketServersocketserver_markupbasemarkupbasereprreprlibtest.test_supporttest.supportTkintertkintertkFileDialogtkinter.filedialogurllib / urllib2urllib, urllib.pars...

# example data test_sentences <- c("The quick brown fox", "jumps over the lazy dog") Is there a match? grepl() is used to check whether a word or regular expression exists in a string or character vector. The function returns a TRUE/FALSE (or "Boolean") vecto...

2.1.x This example depends on Support Library 23.4.0.+. BottomSheetBehavior is characterized by : Two toolbars with animations that respond to the bottom sheet movements. A FAB that hides when it is near to the "modal toolbar" (the one that appears when you are sliding up). A backdr...

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...

We can repeat an action some number of times using repeat. CL-USER> (loop repeat 10 do (format t "Hello!~%")) Hello! Hello! Hello! Hello! Hello! Hello! Hello! Hello! Hello! Hello! NIL CL-USER> (loop repeat 10 collect (random 50)) (28 46 44 31 5 33 43 35 37 4)

(loop for i in '(one two three four five six) do (print i)) (loop for i in '(one two three four five six) by #'cddr do (print i)) ;prints ONE THREE FIVE (loop for i on '(a b c d e f g) do (print (length i))) ;prints 7 6 5 4 3 2 1 (loop for i on '(a b c d e f g) by #'cddr ...

(defvar *ht* (make-hash-table)) (loop for (sym num) on '(one 1 two 2 three 3 four 4 five 5 six 6 seven 7 eight 8 nine 9 ten 10) by #'cddr do (setf (gethash sym *ht*) num)) (loop for k being each hash-key of *ht* do (print k)) ; iterate over the keys (loop for k ...

Simple LOOP form without special keywords: (loop forms...) To break out of the loop we can use (return <return value>) ` Some examples: (loop (format t "Hello~%")) ; prints "Hello" forever (loop (print (eval (read)))) ; your very own REPL (loop (let ((r (read))) ...

(loop for s being the symbols in 'cl do (print s)) (loop for s being the present-symbols in :cl do (print s)) (loop for s being the external-symbols in (find-package "COMMON LISP") do (print s)) (loop for s being each external-symbols of "COMMON LISP" ...

(loop for i from 0 to 10 do (print i)) ; prints 0 1 2 3 4 5 6 7 8 9 10 (loop for i from 0 below 10 do (print i)) ; prints 0 1 2 3 4 5 6 7 8 9 10 (loop for i from 10 above 0 do (print i)) ; prints 10 9 8 7 6 5 4 3 2 1 (loop for i from 10 to 0 do (print i)) ; prints noth...

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

Assuming that bar is an alias for someCommand -flag1. Type bar on the command line and then press Ctrl+alt+e you'll get someCommand -flag1 where bar was standing.

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...