Section 1
Preview this deck
string type string literal
Front
| 5 | 0 | ||
| 4 | 0 | ||
| 3 | 0 | ||
| 2 | 0 | ||
| 1 | 0 |
Active users
0
All-time users
0
Favorites
0
Last updated
6 years ago
Date created
Mar 1, 2020
Cards (54)
Section 1
(50 cards)
string type string literal
Swift's strings are represented by the ____ ___ and the most common way to define then is using a _______ ______
String interpolation
a syntax provided by swift that makes the inclusion of constants, variables, literals, and expressions easier
Comments
use ______ to include non-executable text in your code as a note or reminder to yourself
contains(_:) method
if you want to check if one string is somewhere written in another string
December 2015
when did Apple release the swift language as an open source project
isEmpty
if you need to check if a swift string is empty you can use the boolean property _______
hasSuffix(_:) method
if you want to match the end of the string
Type Safety
which enforces code that's less likely to crash your program
operation
is a special symbol or phrase that is used to check, change, and combine values
hasPrefix(_:) method
if you want to match the beginning of the string
-unary -binary -ternary
Operators can either be:
Type Inference
which speeds up development and allows the compiler to help identify common issues
Type Inference
similarly allows the compiler to infer the type of an object thereby saving you time and again ensuring that the compiler can enforce proper rules regarding what operations and functions can be performed w/ each type
Map, Filter, reduce , and other functional programming patterns
which simplify code and streamline common actions that previously required multiple lines of code
closed range operator (a...b)
defines a range that from a to b
static typing
types are determined during compile time
Binary Operators
operate on two targets and appear in between these targets
Type-safe
-swift is considered a _____ language -_____ languages encourage or require you to be clear about the types or values your code can work with
Constants
when you want to name a value that won't change during the life time of a program
-whitespace characters -mathematical symbols -nor can they start with a number(numbers may used elsewhere in the string)
Constant and Variables can't contain:
Generics
helps developers write codes that can be used in multiple scenarios
Playground
to make learning swift more enjoyable, Apple added a new tool called _______
Type Safety
forces you to be 'explicit' about the type of each object that you create, manipulate, and assign and only lets you write code that the given object can handle
Types and multiple return values
allows smaller units of code to do more
Fast and Concise iteration over collection
making swift a fast language
fallthrough keyword
Swift switch statement would automatically finish executing the entire switch statement this behavior can be overriden though by providing a ______ before ending a case
Control Flow
a ________ ______ statement breaks up the flow of a program by explaining decision making, loops, and branching which enables you to conditionally execute portions of your program
lowercased() method
use ___ if you want to ignore the capitalization of astring when checking for string equality
Ternary conditional operator
is the only one under the ternary category. It takes the form of a question ?answer1:answer2
Automatic Reference Counting(ARC)
for memory management which automatically handles some of the deeper technical challenges of native programming
Type inference
swift uses _______ to make assumptions about the type based on the values assigned to the constant or variable
It's one that's safe,fast, and expressive
What's a modern language?
Optionals
a new way of expressing when a value may not exist
string interpolation
swift uses _____ to include the name of a constant or variable as a placeholder in a longer string and to prompt swift to replace it with the current value of that constant or variable
Clean Syntax
makes code readable and easier to work with
Nested multiline comments
enable you to comment out large blocks of code quickly and easily
-if statements -switch statements
Switch has only 2 basic conditional statements
Safe Language
a no. of feats already mentioned make swift a ______ by helping you write code that is less likely to crash your app
Open Development
means that Swift is developing and improving
String literal
is a raw representation of a string value
half range operator (a..<b)
defines a range that runs from a to b but does not include b
Variable
when you want to name a value that may change during the lifetime of a program
Unary operators
operate on a single target and can appear before(prefix operators) or after (postfix operators) their target
Type annotation
to explicitly specify the type of constant or variable
Playground
a special Xcode document type that runs swift code in a simple format w/ easily visible results
structs that support methods, extensions, and protocols
allows swift to optimize for memory use and speed while providing flexibility for developers
Optionals
are somewhat unique to Swift and allow you to better express when a value may not exist
Objective-C
Swift is a new programming language developed by Apple as an alternative to _________
dynamic typing
types are determined during runtime
Powerful error handling
helps the developer write fewer bugs and better handle scenarios that would cause apps to crash or perform unexpectedly
Section 2
(4 cards)