Snap! (programming language): Difference between revisions

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Latest revision as of 13:54, 7 July 2025

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| logo = [[File:Snap!.svg|200px]]

| logo size = 90PX

| logo caption = Snap''!'' Logo

| paradigm = [[Object-oriented programming|object-oriented]], [[educational programming language|educational]], [[Event-driven programming|event-driven]]

| year = {{start date and age|2011}}

| designer = [[Brian Harvey (lecturer)|Brian Harvey]] and [https://github.com/jmoenig/ Jens Mönig]

| developer = [https://github.com/jmoenig/ Jens Mönig]

| latest release version = 910.27.172

| latest release date = {{Start date and age|20242025|45|245}} <ref>{{cite web|url=https://github.com/jmoenig/Snap/releases|title=jmoenig/Snap|website=GitHub|access-date=May 175, 20242025}}</ref>

| typing = [[Type system|dynamic]]

| implementations =

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| dialects =

| influenced by = [[Scratch (programming language)|Scratch]], [[Scheme (programming language)|Scheme]], [[Logo (programming language)|Logo]], [[Smalltalk]], [[APL (programming language) | APL]]

| influenced = [[Scratch (programming language)|Scratch]], BeetleBlocks, NetsBlox, Dragme IDE, [[Turtlestitch]]

| operating system = [[Cross-platform]]

| license = [[Affero General Public License|AGPL]]

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}}

'''Snap''!''''' (formerly Build Your Own Blocks) is a free block-based [[List of educational programming languages|educational]] graphical programming language and online community. Snap allows students to explore, create, and remix interactive animations, games, stories, and more, while learning about mathematical and computational ideas. While inspired by [[Scratch (programming language)|Scratch]], Snap''!'' has many advanced features. The Snap''!'' editor, and programs created in it, are [[web application]]s that run in the browser (like [[Scratch (programming language)|Scratch 3]]) without requiring [[Installation (computer programs)|installation]].{{#tag:ref|BYOB, Snap''!''{{'}}s predecessor, was a modification of Scratch and could export projects as [[Portable Executable|Windows executables]].|group=Note}} It is built on top of ''Morphic.js'',<ref name="morphic_js">{{cite web |last1=Mönig |first1=Jens |title=morphic.js |url=https://github.com/jmoenig/morphic.js/blob/master/morphic.txt |website=GitHub |accessdate=7 June 2023}}</ref> a [[Morphic (software)|Morphic]] GUI, written by Jens Mönig as 'middle layer' between Snap! itself and 'bare' JavaScript.

==User interface==

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* Expressions using anonymous functions, represented by a block inside a gray ring, having one or more empty slot(s)/argument(s) that are filled by a "higher order function" (the one that is calling the anonymous one). (Their computer-science theoretical basis is [[first class function]]s, which in turn have [[lambda calculus]] as their even more abstract and mathematical foundation)

* Lists that are [[First class object|first class]] (including ''lists of lists/arrays'')

* ''First class'' sprites (or in other words, [[Prototype-based programming|prototype-oriented instance-based classless object programming]])

* "Hyperblocks": functions whose natural ___domain is scalars (text or numbers), extended to accept lists as inputs and apply the underlying function to the scalars in the list or a sublist

* Nestable sprites

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==Mascot==

[[File:Snap! mascot, Alonzo.svg|50px|right]]

Alonzo, the mascot of Snap''!'', bears the name of [[Alonzo Church]], the inventor of a model of computation in which a universal function, represented by lambda, can create any function behavior by calling it on itself in various combinations. The mascot is a modified version of Gobo from [[Scratch (programming language)|Scratch]], with permission of the Scratch teamTeam. Because Alonzo Church's work is called [[lambda calculus]], the mascot's hair is shaped as the Greek letter [[lambda]].

==Special-purpose blocks (libraries)==

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While the software itself has little restraints, it does have some limitations.

These include as follows:

* No native cloud variables

* 10 [[megabyte]] file cap for uploading (Snap''!'' Cloud only)

* Users have to manually enable Javascript when loading a project that uses inline bits of JS, due to a hack a few years ago.

==History==

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==External links==

* {{Official website|snap.berkeley.edu}}

{{Video game engines |state=collapsed}}

{{DEFAULTSORT:Snap! (Programming Language)}}