danielmitiku / enumerable_methods Goto Github PK

def multiply_els(array)
  array.my_inject { |total,value| total*value}
end

def my_inject(arg = nil)
    arr = self.class == Array ? self.clone : self.class == Range ? self.to_a : self.my_map {|k, v| v }
    acc = arg == nil ? arr[0] : arg
    nxt = arg == nil ? arr[1] : arr[0]
    i = arg == nil ? 1 : 0
    while i < arr.size do
      acc = yield(acc,nxt)
      nxt = arr[i+1]
      i+=1
    end
    acc
  end

describe '#my_each_with_index' do
    it 'takes a block with element and index' do
      arr_index = []
      [1, 2, 3, 4].my_each_with_index { |_x, i| arr_index.push(i) }
      expect(arr_index).to eql((0...4).to_a)
    end
  end

def my_count
      if block_given?
        count = 0
        if self.class == Array
          self.my_each do |value|
            if yield(value)
              count += 1
            end
          end
        elsif self.class == Hash
          self.my_each do |key, value|
            if yield(key, value)
              count += 1
            end
          end
        end
        count
      else
        self.size
      end
    end