LiveScript (programming language): Difference between revisions
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{{Infobox programming language | {{Infobox programming language | ||
| name = LiveScript | | name = LiveScript | ||
| paradigms = [[Programming paradigm| | | paradigms = [[Programming paradigm|Multi-paradigm]], [[Functional programming|functional]], [[Object-oriented programming|object-oriented]] | ||
| designers = [[Jeremy Ashkenas]], Satoshi Murakami, George Zahariev | | designers = [[Jeremy Ashkenas]], Satoshi Murakami, George Zahariev | ||
| developers = (same) | | developers = (same) | ||
| Line 10: | Line 10: | ||
| latest release version = 1.6.1 | | latest release version = 1.6.1 | ||
| latest release date = {{Start date and age|df=yes|2020|07|14}}<ref>{{cite web |url=https://github.com/gkz/LiveScript/tags |title=LiveScript Releases |website=[[GitHub]] |access-date=21 February 2021}}</ref> | | latest release date = {{Start date and age|df=yes|2020|07|14}}<ref>{{cite web |url=https://github.com/gkz/LiveScript/tags |title=LiveScript Releases |website=[[GitHub]] |access-date=21 February 2021}}</ref> | ||
| typing = [[Dynamic typing| | | typing = [[Dynamic typing|Dynamic]], [[Strong and weak typing|weak]] | ||
| scope = [[Scope (computer science)|Lexical]] | | scope = [[Scope (computer science)|Lexical]] | ||
| operating system = [[Cross-platform software|Cross-platform]] | | operating system = [[Cross-platform software|Cross-platform]] | ||
Latest revision as of 19:14, 16 June 2026
Template:Short description Script error: No such module "For". Script error: No such module "Unsubst". Script error: No such module "Infobox".Script error: No such module "Check for unknown parameters".
LiveScript is a functional programming language that transpiles to JavaScript. It was created by Jeremy Ashkenas, the creator of CoffeeScript, along with Satoshi Muramaki, George Zahariev, and many others.[1] (The name may be a homage to the beta name of JavaScript; for a few months in 1995, it was called LiveScript before the official release.[2])
Syntax
LiveScript is an indirect descendant of CoffeeScript.[3] The following "Hello, World!" program is written in LiveScript, but is also compatible with CoffeeScript:
hello = ->
console.log 'hello, world!'
While calling a function can be done with empty parens, hello(), LiveScript treats the exclamation mark as a single-character shorthand for function calls with zero arguments: hello!
LiveScript introduces a number of other incompatible idioms:
Name mangling
At compile time, the LiveScript parser implicitly converts kebab case (dashed variables and function names) to camel case.
hello-world = ->
console.log 'Hello, World!'
With this definition, both the following calls are valid. However, calling using the same dashed syntax is recommended.
hello-world!
helloWorld!
This does not preclude developers from using camel case explicitly or using snake case. Dashed naming is however, common in idiomatic LiveScript[4]
Pipes
Script error: No such module "labelled list hatnote".
A pipe operator |> passes the result of an expression on the left of the operator as an argument to the expression on the right of it. LiveScript supports these, as do some other functional languages such as F# and Elixir; the argument passed in F# is the last one, but in Elixir is the first one.
"hello!" |> capitalize |> console.log
# > Hello!
Operators as functions
When parenthesized, operators such as not or + can be included in pipelines or called as if they are functions.
111 |> (+) 222
# > 333
(+) 1 2
# > 3
References
<templatestyles src="Reflist/styles.css" />
Script error: No such module "Check for unknown parameters".