https://github.com/ivlevastef/swiftlazy

Classes (Lazy, Provider) is intended for late initialization.
https://github.com/ivlevastef/swiftlazy

Last synced: 4 months ago
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Classes (Lazy, Provider) is intended for late initialization.

• Host: GitHub
• URL: https://github.com/ivlevastef/swiftlazy
• Owner: ivlevAstef
• License: mit
• Created: 2018-04-08T06:38:19.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2024-12-25T08:03:13.000Z (over 1 year ago)
• Last Synced: 2025-10-20T12:58:39.054Z (8 months ago)
• Language: Swift
• Size: 47.9 KB
• Stars: 14
• Watchers: 3
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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# SwiftLazy

Swift allows for lazy variables out-of-the-box, however they're fairly restricted.

## Features

* Lazy and Provider operations

* Short syntax

* Thread safe

## Usage

### Lazy

```Swift

let lazyInt = Lazy(1)

print(lazyInt.wasMade)  // false

print(lazyInt.value) // 1

print(lazyInt.wasMade)  // true

```

Support arithmetic operations:

```Swift

let lazyInt = Lazy{ 1 + 2 * 5 } * 4 + 10

print(lazyInt.wasMade)  // false

print(lazyInt.value) // 54

print(lazyInt.wasMade)  // true

```

Short syntax:

```Swift

let lazyInt = Lazy(1)

print(*lazyInt) // 1

```

### Provider

```Swift

let providerInt = Provider(1)

print(lazyInt.value) // 1

```

Support arithmetic operations:

```Swift

let providerInt = Provider{ 1 + 2 * 5 } * 4 + 10

print(providerInt.value) // 54

```

Short syntax:

```Swift

let providerInt = Provider(1)

print(*providerInt) // 1

```

### Difference Lazy vs Provider

```Swift

var counter: Int = 0

let lazyInt = Lazy {

  counter += 1

  return counter

}

print(lazyInt.value) // 1

print(lazyInt.value) // 1

print(lazyInt.value) // 1

lazyInt.clear() // no provider

print(lazyInt.value) // 2

print(lazyInt.value) // 2

print(lazyInt.value) // 2

```

```Swift

var counter: Int = 0

let providerInt = Provider {

counter += 1

return counter

}

print(providerInt.value) // 1

print(providerInt.value) // 2

print(providerInt.value) // 3

```

### Version 1.1.0

Add Provider with arguments:

```Swift

let provider = Provider2 { "\($0) + \($1) = \($0 + $1)" }

print(provider.value(10, 20.0)) // "10 + 20.0 = 30.0"

```

Support 1, 2, 3, 4, 5 arguments count.

## Install

###### Via CocoaPods.

To install SwiftLazy with CocoaPods, add the following lines to your Podfile: `pod 'SwiftLazy'`

###### Via Carthage.

github "ivlevAstef/SwiftLazy" 

### The library is integrated with DITranquillity

## Requirements

iOS 11.0+,macOS 10.13+,tvOS 11.0+, watchOS 4.0+, Linux; ARC

## Feedback

### I've found a bug, or have a feature request

Please raise a [GitHub issue](https://github.com/ivlevAstef/SwiftLazy/issues).

### Question?

You can feel free to ask the question at e-mail: ivlev.stef@gmail.com.