NiceThings

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

There is a tests file for all subspec so you could juste see how it work, or continue to read further to the Subspecs section.

Requirements

iOS 10.3
Swift 5

Installation

NiceThings is available through CocoaPods. To install all the subspec, simply add the following line to your Podfile:

pod 'NiceThings'

or just add the subspecs you want:

Subspecs

ArrayRemoveFirstObjectMatching

pod 'NiceThings/ArrayRemoveFirstObjectMatching'

This Array extension adds the method removeFirstObject(matching:). It removes the first element equal to object. The element must be Equatable.

var ages = [12, 16, 2, 7, 16]
ages.removeFirstObject(matching: 16)
print(ages)
// [12, 2, 7, 16]

CollectionSafeSubscript

pod 'NiceThings/CollectionSafeSubscript'

This Array extension provides a subscript [safe:] returning an optional value for the given index. This is usefull if you don't want to crash with an out of bounds index.

var ages = [12, 16, 2, 7, 16]
if ages[safe: 2] != nil {
    print("ages has at least 3 entries")
}
if ages[safe: 25] == nil {
    print("ages has less then 26 entries")
}
// ages has at least 3 entries
// ages has less then 26 entries

ContionalAssignmentOperator

pod 'NiceThings/ContionalAssignmentOperator'

This subspec adds the operator variable ??= value to swift. It assigns value to variable if variable is nil; otherwise, variable stays the same.

var val1: Int?
val1 ??= 12
print(val1 as Any)
//Optional(12)

var val2: String? = "Foo"
val2 ??= "Bar"
print(val2 as Any)
Optional("Foo")

var val3: Double? = 3.14
val3 ??= nil
print(val3 as Any)
Optional(3.1400000000000001)

DictionaryMapToDictionary

pod 'NiceThings/DictionaryMapToDictionary'

This subspec adds the map function to swift dictionary. This function take a closure and return a new dictionary bases on the return of that closure on each (key, value).

let dic = ["A": "a", "B": "b", "C": "c"]
let newDic = dic.map {
    return ($0.lowercased(), $1.uppercased())
}
print(newDic)
// ["c": "C", "a": "A", "b": "B"]

OptionalIsNilOrEmpty

pod 'NiceThings/OptionalIsNilOrEmpty'

Extension to Collection? to know if it is nil or empty.

let str1: String? = "not a nil or empty string"
print(str1.isNilOrEmpty)
//false
let str2: String? = ""
print(str2.isNilOrEmpty)
//true
let str3: String? = nil
print(str3.isNilOrEmpty)
//true

Swerl by philsquared

pod 'NiceThings/Swerl'

Extension to Optional and Result to switch from a type of error handling to another.

unwrap() : Optional -> throws
unwrap() : Result -> throws (with more information)
toResult() : Optional -> Result
toOptional() : Result -> Optional
assume() : Result -> fatalError()

Collaboration

I'll be glad to add other usefull swift tricks in this pod, so feel free to make pull request if you wish to see more.
Do not forget the tests ;)

Author

mlemort, maxime.lemort@viseo.com

License

NiceThings is available under the MIT license. See the LICENSE file for more info.

plieb/NiceThings