Paulette Carlson pycarlson
parksilk
/ array_mode.rb
Last active
June 20, 2018 20:52
Exercise: Calculating the array mode: Write a method "mode" which takes an Array of numbers as its input and returns an Array of the most frequent values. If there's only one most-frequent value, it returns a single-element Array. For example, mode([1,2,3,3]) # => [3]
mode([4.5, 0, 0]) # => [0]
mode([1.5, -1, 1, 1.5]) # => [1.5]
mode([1,1,2,2]) …
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| def mode(array) | |
| counter = Hash.new(0) | |
| # this creates a new, empty hash with no keys, but makes all defalt values zero. it will be used to store | |
| # the information from the array, such that the keys will be each unique number from the array (IOW, if there | |
| # are two or more 4's in the array, there will just be one key that is a 4), and the value for each key will | |
| # be the number of times that integer appears in the array. | |
| array.each do |i| | |
| counter[i] += 1 | |
| end | |
| # this interates throught the array, and for each element it creates a key for that integer (if it hasn't been |