Features: Class with support for property, indexer & operator overloading; await/async for asynchronous programming; Builtin support for linq; Builtin support for datetime literal; First class function; function with Variadic parameters and default values; function with multiple return values; int, uint, float, bool, array, tuple, hash(all support json marshal & unmarshal, all can be extended); try-catch-finally exception handling; Optional Type support(Java 8 like); using statment(C# like); Elixir like pipe operator; Using method of Go Package(RegisterFunctions and RegisterVars); Syntax-highlight REPL; Doc-generation tool mdoc; Integrated services processing; Simple debugger; Simple Macro processing
// async/await
async fn add(a, b) { a + b }
result = await add(1, 2)
println(result)
// linq example
class Linq {
static fn TestSimpleLinq() {
//Prepare Data Source
let ingredients = [
{Name: "Sugar", Calories: 500},
{Name: "Egg", Calories: 100},
{Name: "Milk", Calories: 150},
{Name: "Flour", Calories: 50},
{Name: "Butter", Calories: 200},
]
//Query Data Source
ingredient = from i in ingredients where i.Calories >= 150 orderby i.Name select i
//Display
for item in ingredient => println(item)
}
static fn TestFileLinq() {
//Read Data Source from file.
file = newFile("./examples/linqSample.csv", "r")
//Query Data Source
result = from field in file where int(field[1]) > 300000 select field[0]
//Display
for item in result => printf("item = %s\n", item)
file.close()
}
/* Code from https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/let-clause */
static fn TestComplexLinq() {
//Data Source
stringList = [
"A penny saved is a penny earned.",
"The early bird catches the worm.",
"The pen is mightier than the sword."
]
//Query Data Source
earlyBirdQuery =
from sentence in stringList
let words = sentence.split(" ")
from word in words
let w = word.lower()
where w[0] == "a" || w[0] == "e" ||
w[0] == "i" || w[0] == "o" ||
w[0] == "u"
select word
//Display
for v in earlyBirdQuery => printf("'%s' starts with a vowel\n", v)
}
}
Linq.TestSimpleLinq()
println("======================================")
Linq.TestFileLinq()
println("======================================")
Linq.TestComplexLinq()
//service Hello on "0.0.0.0:8090" {
service Hello on "0.0.0.0:8090:debug" { //':debug': for debugging request
//In '@route', you could use 'url(must), methods, host, schemes, headers, queries'
@route(url="/authentication/login", methods=["POST"])
fn login(writer, request) {
//writer.writeJson({ sessionId: "3d5bd2cA15ef047689" })
//writer.writeJson({ sessionId: "3d5bd2cA15ef047689" }), 200 # same as above
//return { sessionId: "3d5bd2cA15ef047689" }, 200 # same as above
return { sessionId: "3d5bd2cA15ef047689" } // same as above
}
@route(url="/authentication/logout", methods=["POST"])
fn logout(writer, request) {
// writer.writeHeader(http.STATUS_CREATED) # return http status code 201
return http.STATUS_CREATED // same as above
}
@route(url="/meters/setting-result/{acceptNo}", methods=["GET"])
fn load_survey_result(writer, request) {
//using 'vars' dictionary to access the url parameters
//writer.writeJson({ acceptNo: vars["acceptNo"], resultCode: "1"})
return { acceptNo: vars["acceptNo"], resultCode: "1"} // same as above
}
@route(url="/articles/{category}/{id:[0-9]+}", methods=["GET"])
fn getArticle(writer, request) {
//using 'vars' dictionary to access the url parameters
//writer.writeJson({ category: vars["category"], id: vars["id"]})
return { category: vars["category"], id: vars["id"]} // same as above
}
}
Last modified 18 November 2020