Boo (programming language): Difference between revisions

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{{Short description|none}}

'''Boo''' is an [[object oriented]], [[static typing|statically typed]] [[programming language]] developed starting in [[2003]], which seeks to make use of the [[Common Language Infrastructure]] support for [[Unicode]], [[I18n|globalization]] and web style applications, while using a [[Python programming language|Python]]-inspired syntax and a special focus on language and compiler extensibility. Some features of note include [[type inference]], [[generator (computer science)|generator]]s, [[multimethods]], optional [[duck typing]], [[macro]]s, true [[Closure (computer science)|closure]]s, [[currying]], and [[First-class object|first class]] functions.

{{More citations needed|date=July 2011}}

{{Infobox programming language

| name = Boo

| logo = [[File:BooLogo.png]]

| paradigm = [[Object-oriented analysis and design|Object oriented]]

| year = {{Start date and age|2003}}

| designer = Rodrigo B. De Oliveira

| developer = Mason Wheeler

| latest_release_version = 0.9.7

| latest_release_date = {{Start date and age|2013|03|25|df=y}}

| typing = [[static typing|static]], [[strong typing|strong]], [[Type inference|inferred]], [[duck typing|duck]]

| implementations =

| dialects =

| influenced_by = [[C Sharp (programming language)|C#]], [[Python (programming language)|Python]]

| influenced = Genie, [[Vala (programming language)|Vala]]

| programming_language = [[C Sharp (programming language)|C#]]

| platform = [[Common Language Infrastructure]] ([[.NET Framework]] & [[Mono (software)|Mono]])/

| license = [[BSD licenses|BSD 3-Clause]]<ref>{{cite web |url=https://github.com/bamboo/boo/blob/master/license.txt |title=license.txt |access-date=August 5, 2015 |website=github.com}}</ref>

| website = {{URL|https://github.com/boo-lang}}

}}

'''Boo''' is an [[Object oriented programming|object-oriented]], [[Type system#Static typing|statically typed]], [[general-purpose programming language]] that seeks to make use of the [[Common Language Infrastructure]]'s support for [[Unicode]], [[I18n|internationalization]], and web applications, while using a [[Python (programming language)|Python]]-inspired syntax<ref>{{cite web |url=http://boo.codehaus.org/BooManifesto.pdf |title=The boo Programming Language |author=Rodrigo Barreto de Oliveira |year=2005 |access-date=February 22, 2009 |url-status=dead |archive-url=https://web.archive.org/web/20090206045607/http://boo.codehaus.org/BooManifesto.pdf |archive-date=February 6, 2009}}</ref> and a special focus on language and compiler extensibility. Some features of note include [[type inference]], [[generator (computer science)|generators]], [[multimethods]], optional [[duck typing]], [[Macro (computer science)|macros]], true [[Closure (computer science)|closures]], [[currying]], and [[first-class function]]s.

Boo is [[open source]]&ndash;[[free software licence|licensed]] under an [[MIT License|MIT]]/[[BSD license|BSD]] style license.

Boo was one of the three scripting languages for the [[Unity (game engine)|Unity game engine]] ([[Unity Technologies]] employed De Oliveira, its designer), until official support was dropped in 2014 due to the small userbase.<ref>{{cite web |url=https://blogs.unity3d.com/2014/09/03/documentation-unity-scripting-languages-and-you/ |title=Documentation, Unity scripting languages and you |author=aleksandr |date=September 3, 2014 |website=Unity Blogs}}</ref> The Boo Compiler was removed from the engine in 2017.<ref>{{cite web |url=https://blogs.unity3d.com/2017/08/11/unityscripts-long-ride-off-into-the-sunset/ |title=UnityScript's long ride off into the sunset |author=Richard Fine |date=August 11, 2017 |website=Unity Blogs}}</ref> Boo has since been abandoned by De Oliveira, with development being taken over by Mason Wheeler.<ref>{{cite web |url=https://github.com/boo-lang/boo/issues/201 |title=State of Boo · Issue #201 · boo-lang/boo |date=October 2, 2019 |website=GitHub |access-date=January 19, 2023}}</ref>

Boo can be used together with [[Microsoft .NET]] and [[Mono development platform|Mono]].

==Code samples==

Boo is [[free software]] released under the [[BSD licenses|BSD 3-Clause license]]. It is compatible with the [[Microsoft]] [[.NET Framework|.NET]] and [[Mono (software)|Mono]] frameworks.

===[[Hello world program]]===

print "Hello, world!"

== Syntax ==

===[[Fibonacci number|Fibonacci series]] [[generator (computer science)|generator]] function===

{{rewrite|2=section|date=May 2023}}

def fib():

a, b = 0L, 1L

while true:

yield b

a, b = b, a + b

<syntaxhighlight lang="boo">

===Basic Windows Form example demonstrating [[Class (computer science)|classes]], [[Closure (computer science)|closures]], and events===

print ("Hello World")

import System.Windows.Forms

</syntaxhighlight>

import System.Drawing

class MyForm(Form):

def constructor(message as string):

b = Button(Text: "Click Me")

b.Location = Point(100, 50)

b.Click += do():

MessageBox.Show(message)

self.Controls.Add(b)

f = MyForm("you clicked the button!")

Application.Run(f)

<syntaxhighlight lang="boo">

===Asynchronous design pattern with a [[Closure (computer science)|closure]]===

def fib():

import System

a, b = 0L, 1L

# The 'L's make the numbers double word length (typically 64 bits)

def run():

while true:

print("executing")

yield b

a, b = b, a + b

print "started"

result = run.BeginInvoke({ print("called back") })

System.Threading.Thread.Sleep(50ms)

run.EndInvoke(result)

print "done"

# Print the first 5 numbers in the series:

===[[Currying]]===

for index as int, element in zip(range(5), fib()):

plusX = { a as int | return { b as int | return a + b <nowiki>}}</nowiki>

print("${index+1}: ${element}")

</syntaxhighlight>

print plusX(3)(4)

== See also ==

In English: "plusX is a function taking integer a, which returns another function taking integer b that returns a+b."

{{Portal|Free and open-source software}}

* [[Fantom (programming language)|Fantom]]

* [[Groovy (programming language)|Apache Groovy]]

* [[IronPython]]

* [[IronRuby]]

* [[Nemerle]]

* [[REBOL]]

* [[StaDyn (programming language)|StaDyn]]

==References==

{{Reflist}}

== External links ==

Edit: This isn't currying. This is just a function that returns a function. Currying would be something like:

* [https://github.com/boo-lang/boo Official website]

def add(a as int, b as int):

* [http://jbryankelly.files.wordpress.com/2012/07/thinksciboorev2_hb.pdf How To Think Like a Computer Scientist: Learning to Program with Boo]

return a + b

* [https://docs.google.com/file/d/0B8oSXKT4_sy7ZERmYnozaFlTY2M/edit?usp=sharing.pdf Boo Succinctly Revealed]

* [https://web.archive.org/web/20140521221019/http://protoman.net/index.php?p=bootorial%2Findex Bootorial]

{{Common Language Infrastructure}}

add_two = add(2)

Then, add_two would be a partially applied add, with a=2.

add_two(5)

Would set b=5, call the function, and return 7.

Which Boo cannot do.

==See also==

{{portalpar|Free software}}

* [[IronPython]] - an implementation of Python for the .NET framework, similar to [[Jython]].

==External links==

*[http://boo.codehaus.org/ Boo Homepage]

*[http://boo.codehaus.org/Language+Guide Boo Language Guide]

*[http://groups-beta.google.com/group/boolang Boo Google discussion group]

*[http://boo.codehaus.org/Duck+Typing Duck Typing] - dynamic typing in boo

*[http://boo.codehaus.org/Gotchas+for+Python+Users "Gotchas" for Python users]

*[http://boo.codehaus.org/Recipes Boo Recipes], including:

**[http://boo.codehaus.org/XML+Serialization Serializing objects]

**[http://boo.codehaus.org/Regular+Expressions Regular expressions]

**[http://boo.codehaus.org/Invoke+Native+Methods+with+DllImport Invoking native methods with DllImport]

**[http://boo.codehaus.org/Opengl+3D+Samples 3D OpenGL Samples]

**[http://docs.codehaus.org/x/czU Multimethods in boo]

**[http://docs.codehaus.org/x/VTU Dynamic Inheritance - fun with IQuackFu]

[[Category:Programming languages]]

[[Category:.NET programming languages]]

[[Category:Brazilian inventions]]

[[Category:Class-based programming languages]]

[[Category:Free compilers and interpretersopen source compilers]]

[[Category:Imperative programming languages]]

[[Category:.NET programming languages]]

[[Category:Object-oriented programming languages]]

[[Category:ProgrammingProcedural programming languages]]

[[Category:Statically-typed programmingProgramming languages created in 2003]]

[[Category:Software using the BSD license]]

[[Category:Statically typed programming languages]]

[[de:Boo (Programmiersprache)]]

[[Category:2003 software]]

[[es:Boo (programación)]]

[[pt:Boo]]