A super mini script for data processing
using AnalysisScript.Library;
// initialize variables
var variables = new VariableContext()
.AddInitializeVariable("a", 1)
.AddInitialzieVariable("b", new List<int>() { 2, 3, 4 });
// register custom methods
var incrSingle = (AsExecutionContext ctx, int x)
=> ValueTask.FromResult(p + 1);
var incrSequence = (AsExecutionContext ctx, IEnumerable<int> xs)
=> ValueTask.CompleteTask(xs.Select(x => x + 1));
var sumSequence = (AsExecutionContext ctx, IEnumerable<int> xs)
=> xs.Sum();
variables.Methods.RegisterInstanceFunction("inc", incrSingle);
variables.Methods.RegisterInstanceFunction("inc", incrSequence);
variables.Methods.RegisterInstanceFunction("sum", sumSequence);
// run code and get return value
var interpreter = AsInterpreter.Of(variables,
"""
param a
param b
let first = c
| inc
let firstArray = [0, first]
| join ","
let sum = b
| inc
| sum
# use '||' to allow '&' and make '&' reference to previous 'sum' result
|| sum [1, &]
let res = "${firstArray}|${sum}"
return res
""");
var result = await interpreter.RunAndReturn<string>();
****
// Output: 0,2|13
Console.WriteLine(result);# define variable 'a'
param a
let b = arg1
| fn arg2 arg3
| fn2 arg2
| fn3
# Use '||' to block the current value passed to the first arg of the next pipe function
# symbol '&' reference to return value of 'fn3'
|| fn4 & arg2 arg3
|| fn5 [&, arg2, arg3]
# symbol '*' can execute pipes that use 'for each' element from privious
# will throw exception if privious can't cast to 'IEnumerabe<T>'
||* fn6 arg1 & arg3
call fn6 arg1 arg2 arg3
let d = "string interpolation ${c}"
let e = "string ${c} interpolation"
return dparam -> identity
arr -> param
arrs -> '[' arrs arr ',' | empty ']'
argument -> number | string | identity | arrs
arguments -> arguments argument
pipe -> pipe identity argument newline
pipes -> pipes pipe | empty
variable -> identity
let -> let variable = argument [pipes]
call -> call identity argument
cmd -> let | call | comment | param
return -> return identity
cmds -> cmds cmd | empty
analysis -> cmds return