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# TODO: Print the elements at indices 1, 3, 5, 7, etc. on separate lines.
# You should make use of Enumerable#each_with_index
def print_odd_indexed_integers(array)
array.each_with_index { |key,value|
if value.odd?
puts value.to_s
end
}
end
# TODO: Return the odd numbers from a list of integers.
# You should make use of Enumerable#select
def odd_integers(array)
array.select{ |num|
num.odd?
}
end
# TODO: Return the first number from an Array that is less than a particular number - 'limit.'
# You should make use of Enumerable#find
def first_under(array, limit)
array.find {|i|
i<limit
}
end
# TODO: Take an Array of Strings and return a new Array with an exclamation point appended to each String.
# You should make use of Enumerable#map
def add_bang(array)
array.map {|i|
a + "!"
}
end
# TODO: Calculate the sum of an Array of numbers.
# You should make use of Enumerable#reduce
def sum(array)
array.reduce(:+)
end
# TODO: Reorganize an Array of the elements into groups of 3, and then sort each group alphabetically.
# You should make use of Enumerable#each_slice
def sorted_triples(array)
temporary=array.each_slice(3).to_a
temporary.map{|index|
index.sort
}
end
# Driver code... don't change this.
print_odd_indexed_integers([2, 4, 6, 8, 10, 12]) # this should print "4\n8\n12"
puts odd_integers([3, 4, 7, 9, 10, 16]) == [3, 7, 9]
puts first_under([13, 21, 7, 0, 11, 106], 10) == 7
puts add_bang(["hi", "mom"]) == ["hi!", "mom!"]
puts sum([1, 1, 2, 3, 5]) == 12
words = %w(the salted pork is particularly good)
puts sorted_triples(words) == [["pork", "salted", "the"],
["good", "is", "particularly"]]
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