# Swift
System Programming for mobile, desktop, tvOS and IoT devices for apple ecosystem
# History
- origins 2014
- open sourced under Apache 2.0 license from 2015
- fast and safe (memory safe) by design
- arrays and integers are checked for overflow and undeflow
- objects can never br
null, unless optional
- replacement for C-based languages like
C,C++,objective-C,C#
# Language tools
- REPL, web and console
- swift Compiler
- swift LLDB debugger
- core libraries
- swift package manager
Package.swift - Xcode editor
- open-source swift for linux
# Swift system modules
- Darwin
- CoreData
- Glibc - The GNU C Library project provides the core libraries for the GNU system and GNU/Linux systems, as well as many other systems that use Linux as the kernel. These libraries provide critical APIs including ISO C11, POSIX.1-2008, BSD, OS-specific APIs and more. These APIs include such foundational facilities as open, read, write, malloc, printf, getaddrinfo, dlopen, pthread_create, crypt, login, exit and more.
# Getting Started
swift run package-collection-generate --help
swift package init
swift build
swift test
# Swift Syntax
- constants
let - dynamically typed variables
var niltype- Nil-Coalescing Operator
a ?? b - range Operator
# How to develop macOS application?
macOS SDk 12
- build a sidebar with items from data-source
- program Toolbar controls and menu options
- Support touchbar
- SwiftUI same API across all apple products. User Interfaces for apple platform