IntroJS is a JavaScript implementation of the simplified programming language Intro.
npm install introjsIntroJS is a JavaScript implementation of the simplified programming language Intro.
``
def main()
var n = read_int()
if n <= 0
return
end
while 1
var values = read_ints(n)
if !$values
break
end
write_int(sum(values))
end
end
def sum(values: Int[]): Int
var ret = 0
for v in values
ret += v
end
return ret
end
`
Data types are only integer type (Int) and its array types (Int[], Int[][], ...).
All codes must be written in a file.
Top level elements are only function declarations.
A program needs a main function.
Function parameters need a data type.
Variable declaration needs initialization.
I/O format is plain text which line is integer values separated by white spaces.
To read from stdin, you can use read* builtin functions.
To write to stdout, you can use write* builtin functions.
To print variables to stderr, you can use trace statement.
To branch by conditions, you can use if-elseif-else statement.
To get a length of array, you can use $ operator.
`
def main()
var values = [3, 1, 4, 1, 5]
trace values, $values
# Ascending index
for i in 0 :< $values
write_ints([i, values[i]])
end
# Ascending index (Omitted "0 :<")
for i in $values
write_ints([i, values[i]])
end
# Each element
for v in values
write_int(v)
end
# Descending index
for i in $values - 1 :>= 0
write_ints([i, values[i]])
end
# Skip
for i in 1 :< $values :% 2
write_ints([i, values[i]])
end
end
`
`
npm install -g introjs
`
Usage: introjs [options]
Options:
-c, --convert:
print converted AST
-g, --generate:
print generated JavaScript
-h, --help:
print help
-p, --parse:
print parsed AST
-t, --test:
execute test
-v, --version:
print version
`
def get_date(): Int[]
`
def get_time(): Int
`
def read(values: Int[], offset: Int, length: Int): Int
`
def read_int(): Int
`
def read_ints(max_length: Int): Int[]
`
def write(values: Int[], offset: Int, length: Int)
`
def write_int(value: Int)
`
def write_ints(values: Int[])
* Variable-length array
* Associative array
* Miscellaneous data types
* Multiline comment
* Switch statement
* Do-while statement
* Exception handling
* Module
* Class
* Closure
* Coroutine
* Generics
* Annotation
* Multithread
* Asynchronous
* Source map
* Debugger
* REPL
MIT