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  1. or download this
    # Function call style.
if (grep $something, @array) { ... }
my @result = grep $thingie, @array;
  2. or download this
    # Method call style.
if @array.grep($something) { ... }
my @result = @array.grep($thingie);
  3. or download this
    # Feed style.
my @result <== grep $thingie <== @array;
...

# Another method call style.
my @result = grep @array: $thingie;