Everything you need for the Weekly Kata
- Use Visual Studio Code
- Click Extensions tab on Left Navigation bar (L=last one in the list)
- Click ... menu above Search placeholder and click Install from VSIX
- Download Strict extension using this link https://drive.google.com/file/d/1CEFDCB3OIEDEJOV8vfz2ErXxVBZZthKy/view and use the vsix file
- Create a new folder and name it as "Kata" (like namespace in CSharp)
- Create a new file and name it as "ClassNameForKata.strict" (use best suitable class name for the Kata)
- Clone Strict repository into your machine Github - https://github.com/strict-lang/Strict Clone Folder Path - C:\code\GitHub\strict-lang\Strict
- Open Strict.sln in Visual Studio Run Strict.LanguageServer
- Start coding in Strict using below language guidelines
How to Run Strict
As of now, executing the whole type is not implemented so we have to execute only the methods using command pallete.
- Press Ctrl + Shift + P to open command palette
- Click Run Strict option
- Type the test method call expression with type name and press enter. For example, FileName.MethodName(testArguments,..) OR FileName(constructorArgument1,..).MethodName(testArguments,..)
- Output can be viewed in the Output tab (Terminal) and select Strict in the Tasks dropdown
The folder that contains .strict extension files are created as a package in Strict. For example, if your folder name is Kata, then the strict package name is Kata which has all of the types present in the folder. By default this Kata package will be stored as a sub package under Base package so that all your custom types can access the base package types easily.
Basically, everything in Strict is a type. For example, Number, Text, Boolean etc. are already present in the base package and avaialble all the time. By just using the type name anywhere in your program, it can be inferred automatically based on the usage and either gets an instance of the type or use it as a type definition.
has number //--> This will create a Number instance automatically (mostly use the same Number instance everytime as everything is immutable by default) // OR alternatively has memberName Number // --> This is manually declaring the type of the member
In strict, every new file with .strict extension creates a new type with program present in the file similar to a class in C# language. You can use all the existing types such as base package types and example package types in your program all the time. The type name is same as the file name. Type can contain members and methods.
Type with only members will be treated as Enum in Strict. Refer Enum https://strict.dev/docs/Types#enum
Members in strict are like the properties of a class in C# language. You can define a private or public member based on the requirement of the type. The syntax to define a member is as follows
has memberName TypeName //OR has typeName //--> member with name typeName will be created and automatically finds the type without defintion
has input Number //OR has number
Each type should have atleast one memeber otherwise the type will be treated as a trait which similar to an interface in C#.
Always after members, methods should be declared. Syntax for the method definition is as follows,
has memberName MethodName(optionalParam1 Param1Type,..) MethodReturnType // Brackets should not be used for parameter less method defintion test expression 1 // atleast one test expression should be added for each method method body line1 // method body should start with a tab in the beginning method body line2 returnExpression // return keyword is not needed if the last expression is the return expression
Floor(input Number) Number Floor(1) is 1 Floor(2.4) is 2 value - value % 1
To know the methods avaialble in base types, open a base strict file and then you can see all of the available methods and the method definition. Visual studio code does show these details with autocomplete feature.
Each method should have at least one test expression otherwise it won't be allowed for parsing. To write a test expression, follow the below syntax,
TypeName.MethodName(testArguments,..) OR TypeName(constructorArgument1,..).MethodName(testArguments,..)
Here type name is the file name where the program is written.
All members which are not initialized in the type are constructor arguments. When a type instance is created, those constructor arguments should be passed otherwise the parser will throw error.
has elements List Reverse List ReverseList(1, 2, 3, 4).Reverse is (4, 3, 2, 1) // Here (1, 2, 3, 4) is a constructor argument and will be used to initialize elements member during ReverseList type instance creation ReverseList("A", "B", "C", "D").Reverse is ("D", "C", "B", "A") ReverseList(true, false).Reverse is (false, true) return for Range(elements.Length - 1, 0) elements(index)
IfElse works the similar way as any other programming language and the syntax is as follows,
if condition then expression // should start with a tab in the beginning and can be multiline return expression // return keyword should be used here for method return expression else // else block is optional optional else block expression
if value is "(" parentheses.Increment else if value is ")" parentheses = parentheses - 1 else if parentheses is 0 result = result + value
Refer For loop in this document https://strict.dev/docs/For#for
List data structure in strict can contain multiple elements of same type and the syntax for a list is as follows,
(element1, element2, element3,..)
Round brackets should be used in the beginning and end of the list; elements should be separated by a comma followed by space character.
(1, 2, 3, 4, 5) ("Hi", "Hello") (true, true, false, false, true)
List uses Generics and any type ends with an 's' character will be automatically inferred as List of that type. For example, Numbers automatically means List of Number, similarly Texts, Booleans creates their own List implementation with that type.
You can do assignments to either a member of a method variable. The syntax for both are as follows,
For member assignment
has memberName = Assignment expression
has inputList = (1, 2, 3) has input = 5
For method variable assignment
constant variableName = Assignment expression
constant input = (1, 2, 3)
Members or variables declared as constant are always immutable and cannot be changed.
Members or variables defined using constant keyword are always immutable. In fact, everything in Strict is immutable unless it is declared as Mutable using below syntax,
mutable memberName = Assignment expression mutable variableName = Assignment expression
mutable result = Numbers // this assigns a mutable empty list expression of type number to the member result mutable counter = 0 // this assigns a mutable number expression with value 0 to the variable counter
Range works similar to C# Range type. Start and End value should be passed to the constructor of Range during instance creation. This can be used for repeated iterations in the loop. Refer Range.strict in base folder for more details about Range. Syntax to create Range is as follows,