How to find a min max with Ruby

Question

I want to use min 5 10   or Math max 4 7    Are there functions to this effect in Ruby

User · Accepted Answer

You can do    5  10  min   or    4  7  max   They come from the Enumerable module  so anything that includes Enumerable will have those methods available   v2 4 introduces own Array min and Array max  which are way faster than Enumerable s methods because they skip calling  each    nicholasklick mentions another option  Enumerable minmax  but this time returning an array of  min  max     4  5  7  10  minmax   gt   4  10

User · Answer

If you need to find the max min of a hash  you can use  max by or  min by  people     joe    gt  21   bill    gt  35   sally    gt  24   people min by    name  age  age      gt    joe   21  people max by    name  age  age      gt    bill   35

User · Answer

In addition to the provided answers  if you want to convert Enumerable max into a max method that can call a variable number or arguments  like in some other programming languages  you could write   def max  values   values max end   Output   max 7  1234  9  -78  156    gt  1234   This abuses the properties of the splat operator to create an array object containing all the arguments provided  or an empty array object if no arguments were provided  In the latter case  the method will return nil  since calling Enumerable max on an empty array object returns nil   If you want to define this method on the Math module  this should do the trick   module Math  def self max  values    values max  end end   Note that Enumerable max is  at least  two times slower compared to the ternary operator       See Dave Morse s answer for a simpler and faster method

User · Answer

All those results generate garbage in a zealous attempt to handle more than two arguments  I d be curious to see how they perform compared to good  ol   def max  a b    a gt b   a   b end   which is  by-the-way  my official answer to your question

User · Answer

You can use    5 10  min    or     4 7  max   It s a method for Arrays

[ruby] How to find a min/max with Ruby

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