Motiv 7.2.0
See the version list below for details.
dotnet add package Motiv --version 7.2.0
NuGet\Install-Package Motiv -Version 7.2.0
<PackageReference Include="Motiv" Version="7.2.0" />
paket add Motiv --version 7.2.0
#r "nuget: Motiv, 7.2.0"
// Install Motiv as a Cake Addin #addin nuget:?package=Motiv&version=7.2.0 // Install Motiv as a Cake Tool #tool nuget:?package=Motiv&version=7.2.0
Motiv
Know Why, not just What
Motiv is a developer-first .NET library that transforms the way you work with boolean logic. It lets you form expressions from discrete propositions so that you can explain why decisions were made.
First create atomic propositions:
// Define propositions
var isValid = Spec.Build((int n) => n is >= 0 and <= 11).Create("valid");
var isEmpty = Spec.Build((int n) => n == 0).Create("empty");
var isFull = Spec.Build((int n) => n == 11).Create("full");
Then compose using operators (e.g., !
, &
, |
, ^
):
// Compose a new proposition
var isPartiallyFull = Spec.Build(isValid & !(isEmpty | isFull))
.Create("partial");
To get detailed feedback:
var result = isPartiallyFull.IsSatisfiedBy(5);
result.Satisfied; // true
result.Assertions; // ["partial"]
result.Justifications // partial
// AND
// valid
// NOR
// !empty
// !full
Why Use Motiv?
Motiv primarily gives you visibility into your application's decision-making process. By decomposing expressions into propositions, it addresses important architectural concerns and enables more advanced use cases, such as implementing rules engines.
Consider using Motiv if your project requires two or more of the following:
- Visibility: Provide detailed, real-time feedback about decisions made.
- Decomposition: Break down complex logic into meaningful subclauses for improved readability.
- Reusability: Reuse logic across multiple locations to reduce duplication.
- Modeling: Explicitly model your domain logic.
- Testing: Easily test your logic without mocking or stubbing dependencies.
Use Cases
Motiv can be applied in various scenarios, including:
- User Feedback: Provide detailed explanations about decision outcomes.
- Debugging: Quickly find out the causes from complex logic.
- Multilingual Support: Offer explanations in different languages.
- Validation: Ensure user input meets specific criteria and provide detailed feedback.
- Auditing: Log why something happened, and not just what.
Installation
Install Motiv via NuGet Package Manager Console:
Install-Package Motiv
Or using the .NET CLI:
dotnet add package Motiv
Usage
Basic Proposition
Create and evaluate a basic proposition:
var isEligibleForLoan =
Spec.Build((Customer customer) =>
customer is
{
CreditScore: > 600,
Income: > 100000
})
.Create("eligible for loan");
var result = isEligibleForLoan.IsSatisfiedBy(eligibleCustomer);
result.Satisfied; // true
result.Reason; // "eligible for loan"
result.Assertions; // ["eligible for loan"]
Propositions with Custom Assertions
Use WhenTrue()
and WhenFalse()
for user-friendly explanations:
var isEligibleForLoan =
Spec.Build((Customer customer) =>
customer is
{
CreditScore: > 600,
Income: > 100000
})
.WhenTrue("eligible for a loan")
.WhenFalse("not eligible for a loan")
.Create();
Composing Propositions
Combine propositions using boolean operators:
var hasGoodCreditScore =
Spec.Build((Customer customer) => customer.CreditScore > 600)
.WhenTrue("good credit score")
.WhenFalse("inadequate credit score")
.Create();
var hasSufficientIncome =
Spec.Build((Customer customer) => customer.Income > 100000)
.WhenTrue("sufficient income")
.WhenFalse("insufficient income")
.Create();
var isEligibleForLoan = hasGoodCreditScore & hasSufficientIncome;
var result = isEligibleForLoan.IsSatisfiedBy(eligibleCustomer);
result.Satisfied; // true
result.Reason; // "good credit score & sufficient income"
result.Assertions; // ["good credit score", "sufficient income"]
Higher Order Logic
Provide facts about collections:
var allNegative =
Spec.Build((int n) => n < 0)
.AsAllSatisfied()
.WhenTrue("all are negative")
.WhenFalseYield(eval => eval.FalseModels.Select(n => $"{n} is not negative"))
.Create();
var result = allNegative.IsSatisfiedBy([-1, 2, 3]);
result.Satisfied; // false
result.Assertions; // ["2 is not negative", "3 is not negative"]
Tradeoffs
Consider these potential tradeoffs when using Motiv:
- Performance: Motiv isn't optimized for high-performance scenarios where nanoseconds matter.
- Dependency: Once integrated, Motiv becomes a core dependency in your codebase.
- Learning Curve: While Motiv introduces a new approach, it's designed to be intuitive and easy to use.
License
Motiv is released under the MIT License. See the LICENSE file for details.
Resources
Product | Versions Compatible and additional computed target framework versions. |
---|---|
.NET | net5.0 was computed. net5.0-windows was computed. net6.0 was computed. net6.0-android was computed. net6.0-ios was computed. net6.0-maccatalyst was computed. net6.0-macos was computed. net6.0-tvos was computed. net6.0-windows was computed. net7.0 was computed. net7.0-android was computed. net7.0-ios was computed. net7.0-maccatalyst was computed. net7.0-macos was computed. net7.0-tvos was computed. net7.0-windows was computed. net8.0 is compatible. net8.0-android was computed. net8.0-browser was computed. net8.0-ios was computed. net8.0-maccatalyst was computed. net8.0-macos was computed. net8.0-tvos was computed. net8.0-windows was computed. |
.NET Core | netcoreapp2.0 was computed. netcoreapp2.1 was computed. netcoreapp2.2 was computed. netcoreapp3.0 was computed. netcoreapp3.1 was computed. |
.NET Standard | netstandard2.0 is compatible. netstandard2.1 was computed. |
.NET Framework | net461 was computed. net462 was computed. net463 was computed. net47 was computed. net471 was computed. net472 was computed. net48 was computed. net481 was computed. |
MonoAndroid | monoandroid was computed. |
MonoMac | monomac was computed. |
MonoTouch | monotouch was computed. |
Tizen | tizen40 was computed. tizen60 was computed. |
Xamarin.iOS | xamarinios was computed. |
Xamarin.Mac | xamarinmac was computed. |
Xamarin.TVOS | xamarintvos was computed. |
Xamarin.WatchOS | xamarinwatchos was computed. |
-
.NETStandard 2.0
- Microsoft.CSharp (>= 4.7.0)
-
net8.0
- Microsoft.CSharp (>= 4.7.0)
NuGet packages
This package is not used by any NuGet packages.
GitHub repositories
This package is not used by any popular GitHub repositories.
Version | Downloads | Last updated | |
---|---|---|---|
7.4.3 | 55 | 8/1/2024 | |
7.4.2 | 40 | 7/31/2024 | |
7.4.1 | 57 | 7/24/2024 | |
7.4.0 | 78 | 7/19/2024 | |
7.3.0 | 89 | 6/26/2024 | |
7.2.0 | 81 | 6/25/2024 | |
7.1.0 | 81 | 6/24/2024 | |
7.0.4 | 68 | 6/24/2024 | |
7.0.3 | 86 | 6/23/2024 | |
7.0.2 | 112 | 6/17/2024 | |
7.0.1 | 81 | 6/12/2024 | |
7.0.0 | 121 | 5/4/2024 | |
6.0.0 | 110 | 4/29/2024 | |
5.0.0 | 99 | 4/28/2024 | |
4.0.0 | 113 | 4/27/2024 | |
3.1.1 | 99 | 4/26/2024 | |
3.1.0 | 113 | 4/26/2024 | |
3.0.0 | 107 | 4/20/2024 | |
2.0.0 | 127 | 4/1/2024 | |
1.0.7 | 117 | 3/29/2024 |