Function class
More actions
Function : The function object
Constructors
- (string functionName) - Create a new function that will reuse an existing function.
Methods
- AnyType Call(Params AnyType) - Evaluate a function with positional parameters.
- AnyType Invoke(array parameter) - Evaluate a function with positional parameters.
- AnyType Invoke(Dictionary parameter) - Evaluate a function with named parameters.
- string ToString() - The string representation of the object.
Properties
- string ObjectTypeName HasGetter - The name of the type of object.
- TypeInformation TypeInformation HasGetter - Get information about this class.
Scoping of variables
Ex1:
function a = function ()
{
number b = 1;
return true;
};
print(b); // Not work, get error: Undefined variable name: 'b'. @
Ex2:
number i = 10;
function a = function () {
print(i);
print(b);
};
number b = 20;
a.Call(); // 10 20
Ex3:
number i = 10;
function a = function () {
print(i);
print(b);
};
a.Call(); // Not work, get error: Undefined variable name: 'b'. @
number b = 20;
Ex4:
number i = 10;
function a = function (number i) {
print(i);
};
a.Call(100); // 100
print(i); // 10
Ex5:
number i = 10;
function a = function () {
number i = 100;
print(i);
};
a.Call(); // Not work, get error: Illegal variable re-declaration @
Recursion
Ex1:
function a = function (number i)
{
if (i == 0) return;
a.Call(i - 1);
return i;
};
a.Call(49); // Return 49
Ex2:
function a = function (number i)
{
if (i == 0) return;
a.Call(i - 1);
return i;
};
a.Call(50); // get error because the maximum limit of recursion is: 49
Examples
function x = function (number a, number b, number c = 10)
{
number d = 1;
return a + b + c + d + p;
};
number p = 10;
print(x.Call(1,2));
print(x.Call(1,2,3));
function y = x;
print(y.Call(1,2));
print(y.Call(1,2,3));
function z = new Function("x"); // remmember that new Function("x") NOT new function("x")
print(z.Call(1,2));
print(z.Call(1,2,3));
function f; // will be empty
Function ff; // get error because there is no default constructor
array paraArray_a = {1,2};
array paraArray_b = {1,2,3};
print(x.Invoke(paraArray_a));
print(x.Invoke(paraArray_b));
Dictionary dic1 = {"a": 1,"b": 2};
print(x.Invoke(dic1)); // 24
Dictionary dic2 = {"a": 1,"b": 2,"c": 3};
print(x.Invoke(dic2)); // 17
Dictionary dic3 = {"c": 3,"a": 1,"b": 2};
print(x.Invoke(dic3)); // 17
Dictionary dic = {"para_1": 1,"para_2": 2,"para_3": 3};
print(x.Invoke(dic)); // will cause error because the keys in dictionary not the same as name of parameters which is defined in function x
Send function to Called Workflow
Ex1:
// IN FIRST WORKFLOW
function x = function (number a, number b) {
return a + b;
};
Workflow_call(37248984, {x});
// IN SECOND (CALLED) WORKFLOW (Resource Id: 37248984)
array Workflow_parameters = Workflow_getParameters();
return Workflow_parameters[0].Call(1,2);
// ------get result: 3---------
Ex2:
// IN FIRST WORKFLOW
number i = 10;
function x = function (number a, number b) {
return a + b + i;
};
Workflow_call(37248984, {x});
// IN SECOND (CALLED) WORKFLOW (Resource Id: 37248984)
array Workflow_parameters = Workflow_getParameters();
return Workflow_parameters[0].Call(1,2);
// ------get result: 13---------