Guitar 🎸

A Cross-Platform String and Regular Expression Library written in Swift.

About

This library seeks to add common string manipulation functions, including common regular expression capabilities, that are needed in both mobile and server-side development, but are missing in Swift’s Standard Library.

The full documentation can be found at http://www.sabintsev.com/Guitar/.

Guitar is also part of Swift’s Source Compatibility Suite.

Features

Boolean Functions (isAlpha, isNumeric, isUppercase, etc.)
Case Functions (camelCased, pascalCased, kebabCased, etc.)
Latinization Functions (.latinized(), .withoutAccents())
Padding Functions (padLeft, padRight, pad)
Regular Expressions (with Common Patterns Built-in)

Sherlocked

A small set of functions offered by Guitar were removed in v0.3.0 of the library as Apple added many of these features to the Swift 4 language (aka, Sherlocking). The functions that were removed were: first, last, length, prefixed, suffixed, trimLeft, trimRight, truncated. The reversed function was renamed to reversedString as it acts slightly differently than Swift’s built-in reversed function.

Installation Instructions

Swift Version	Branch Name	Will Continue to Receive Updates?
5.1+	master	Yes
5.0	swift5.0	No
4.2	swift4.2	No
4.1	swift4.1	No
3.2	swift3.2	No
3.1	swift3.1	No

CocoaPods

pod 'Guitar' # Swift 5.1+
pod 'Guitar', :git => 'https://github.com/ArtSabintsev/Guitar.git', :branch => 'swift5.0' # Swift 5.0
pod 'Guitar', :git => 'https://github.com/ArtSabintsev/Guitar.git', :branch => 'swift4.2' # Swift 4.2
pod 'Guitar', :git => 'https://github.com/ArtSabintsev/Guitar.git', :branch => 'swift4.1' # Swift 4.1
pod 'Guitar', :git => 'https://github.com/ArtSabintsev/Guitar.git', :branch => 'swift3.2' # Swift 3.2
pod 'Guitar', :git => 'https://github.com/ArtSabintsev/Guitar.git', :branch => 'swift3.1' # Swift 3.1

Swift Package Manager

.Package(url: "https://github.com/ArtSabintsev/Guitar.git", majorVersion: 1)

Usage Examples

Regular Expression

Guitar makes it easier to use Regular Expressions to test and evaluate String objects.
Guitar.Chord enumerates common regular expressions and they are located in GuitarChord.swift.
GuitarCommon.swift contains a list of convenience methods for common regular expression evaluations and tests, such as checking the string to determine if it’s a valid email address.

Initialization

Guitar(pattern: String) // A custom regular expression with which to initialize Guitar.

Guitar(chord: Guitar.Chord) // A common regular expression with which to initialize Guitar.

Methods

evaluateForRanges(::) returns an array of ranges, [Range<String.Index>], that match a specific regular expression.

Guitar(chord: .firstCharacter).evaluateForRanges(from: "Hello world") // [Range(Swift.String.CharacterView.Index(_base: Swift.String.UnicodeScalarView.Index(_position: 0), _countUTF16: 1)..<Swift.String.CharacterView.Index(_base: Swift.String.UnicodeScalarView.Index(_position: 1), _countUTF16: 1)), Range(Swift.String.CharacterView.Index(_base: Swift.String.UnicodeScalarView.Index(_position: 6), _countUTF16: 1)..<Swift.String.CharacterView.Index(_base: Swift.String.UnicodeScalarView.Index(_position: 7), _countUTF16: 1))]

evaluateForStrings(::) returns an array of strings, [String], that match a specific regular expression.

Guitar(chord: .firstCharacter).evaluateForStrings(from: "Hello world") // ["H", "w"]

test(::) evaluates a string with a specific regular expression. true is returned if matches are found in the string. Otherwise, false is returned.

Guitar(chord: .email).test(string: "hello@world.com") // `true`

String Extension

This library also adds dozens of methods via String extensions that are missing in the Swift Standard Library or not easily accessible on the String class. Check GuitarBoolean.swift and GuitarPadding.swift to see these examples.

More specific examples can be found in the tests folder.

Inspiration

Created and maintained by

Arthur Ariel Sabintsev