Cobra is a discontinued general-purpose, object-oriented programming language.^[1] Cobra is designed by Charles Esterbrook, and runs on the Microsoft .NET and Mono platforms.^[2] It is strongly influenced by Python, C#, Eiffel, Objective-C, and other programming languages.^[3] It supports both static and dynamic typing.^[4][5] It has support for unit tests and contracts.^[4] It has lambda expressions, closures, list comprehensions, and generators.^[6]

Cobra is an open-source project; it was released under the MIT License on February 29, 2008.^[7][8]

Object-oriented

• Namespaces
• Classes, interfaces, structs, extensions, enumerations
• Methods, properties, indexers
• Mixins, extension methods
• Generics, attributes

Quality control

• Contracts, assertions
• Unit tests, docstrings
• Compile-time nil-tracking

Expressiveness

• Static and dynamic binding
• List, dictionary, and set literals
• in and implies operator
• for expressions
• Slicing
• Interpolated strings
• Compile-time type inference
• Lambdas and closures

General productivity

• Exception handling
• Postmortem exception report
• Garbage collection

Scripting conveniences

• Clean syntax
• Dynamic binding
• One-step run
• Shebang line (#!)

Miscellaneous

• Documentation tool (cobra -doc)
• Syntax highlighting tool (cobra -highlight)

The following examples can be run from a file using cobra <filename>.

class Hello
    def main
        print 'HELLO WORLD'

class Person

    var _name as String
    var _age as int

    cue init(name as String, age as int)
        _name, _age = name, age

    def toString as String is override
        return 'My name is [_name] and I am [_age] years old.'