#!/usr/bin/ruby

# Implicit method call on the special '_' variable via the unary operator: '.'
<a b c>.map{.uc} == <A B C> ||
    die(".uc error");
# ['A', 'B', 'C']

# Numbers preeceded by a dot ('.') are still floating point numbers:
.42 == 0.42 ||
    die ".42 error";
# prints 0.42

# However, a method CAN be stored inside a variable or CAN be an expression
var method = 'uc';
<a b c>.map{.$method} == «A B C» ||
    die ".$method error";
# ['A', 'B', 'C']

# Call on user-defined '_' method
var _ = 'ok';
.uc == "OK" ||
    die(".uc error");

<a b c>.map{.('u'+'c')} == %w(A B C) ||
    die ".(expr) error";
# ['A', 'B', 'C']

say "All is OK!"
