These two binary infix operators simplify some frequent scenarios
Pipe operator
This operator allows to pass the value from left operand to the right operand and return the result of the right operand.
readLine() -> log(_) // it's the same as log(readLine())
readLine() ->
_ == "" ? log("empty line")
: process(_);
// It's the same as
{
x = readLine();
x == "" ? log("empty line")
: process(x)
};Initializer (colombo) operator
This operator allows to perform arbitrary operations on some value (usually newly created) and pass this value further:
form.add(Button.{
_.flexWidth := 20; // assign to button fields
_.setPaddings(5); // call button's methods
// create a delegate associated with the button and store it in the button field
_onClick := _.&onOk(){ log("Ok") }
myForm.ok := &_; // save a weak pointer to the button into some other object
});
// It's the same as
form.add({
btn = Button;
btn.flexWidth := 20;
btn.setPaddings(5);
btn.onClick := btn.&onOk(){ log("Ok") }
myForm.ok := &btn;
btn
});It's like "take this, but BTW let's do this".