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Contents
class ListOps
## Do not use the functions map, concat, count, length, etc.
## and other built in ruby methods to solve these
##
def self.arrays(arr)
counter = 0
arr.each do
counter += 1
end
counter
end
def self.reverser(arr)
answer = []
until arr.empty?
answer << arr.pop
end
answer
end
def self.concatter(arr1, arr2)
answer = []
arr1.each do |element|
answer << element
end
arr2.each do |element|
answer << element
end
answer
end
def self.mapper(arr)
answer = []
arr.each do |element|
answer << yield(element) if block_given?
end
answer
end
def self.filterer(arr)
answer = []
arr.each do |element|
answer << element if block_given? && yield(element)
end
answer
end
def self.sum_reducer(arr)
total = 0
arr.each do |element|
total += element
end
total
end
def self.factorial_reducer(arr)
total = 1
arr.each do |element|
total = total * element
end
total
end
end
module BookKeeping
VERSION = 2
end
Version data entries
396 entries across 396 versions & 1 rubygems