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Codewars LV8x1、LV7x1

題目(Convert number to reversed array of digits)：

Convert number to reversed array of digits
Given a random number:

C#: long;
C++: unsigned long;
You have to return the digits of this number within an array in reverse order.

Example:
348597 => [7,9,5,8,4,3]

def digitize(n)
  #your code here
end

Test.assert_equals(digitize(35231),[1,3,2,5,3])

題目(Highest and Lowest)：

In this little assignment you are given a string of space separated numbers, and have to return the highest and lowest number.

Example:

high_and_low("1 2 3 4 5")  # return "5 1"
high_and_low("1 2 -3 4 5") # return "5 -3"
high_and_low("1 9 3 4 -5") # return "9 -5"
Notes:

All numbers are valid Int32, no need to validate them.
There will always be at least one number in the input string.
Output string must be two numbers separated by a single space, and highest number is first.

def high_and_low(numbers)
  #your code here
end

Test.assert_equals(high_and_low("4 5 29 54 4 0 -214 542 -64 1 -3 6 -6"), "542 -214")

影片解題：

答案：

# Convert number to reversed array of digits
def digitize(n)
  n.to_s.chars.map{|x| x.to_i}.reverse
end


# Highest and Lowest
def high_and_low(numbers)
  max = numbers.split.map{|x| x.to_i}.max
  min = numbers.split.map{|x| x.to_i}.min
  "#{max} #{min}"
end

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