print('--- arrayMap ----')
print(arrayMap(x -> x * 2, [1,2,3]))

print('--- arrayExists ----')
print(arrayExists(x -> x like '%nana%', ['apple', 'banana', 'cherry']))
print(arrayExists(x -> x like '%boom%', ['apple', 'banana', 'cherry']))
print(arrayExists(x -> x like '%boom%', []))

print('--- arrayFilter ----')
print(arrayFilter(x -> x like '%nana%', ['apple', 'banana', 'cherry']))
print(arrayFilter(x -> x like '%e%', ['apple', 'banana', 'cherry']))
print(arrayFilter(x -> x like '%boom%', []))