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exercism-71 Protein translation

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`@@ -292,6 +292,7 @@ solution of many challenges of [Leetcode](https://leetcode.com/), [Exercism](htt`
`292`	`292`	`68. [Run Length Encoding](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/run_length_encoding.rb)`
`293`	`293`	`69. [Robot Simulator](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/robot_simulator.rb)`
`294`	`294`	`70. [Beer Song](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/beer_song.rb)`
	`295`	`+71. [Protein Translation](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/protein_translation.rb)`
`295`	`296`
`296`	`297`	`<a name="leetcode"/>`
`297`	`298`

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	`1`	`+# Problem: https://exercism.org/tracks/ruby/exercises/protein-translation`
	`2`	`+`
	`3`	`+# Solution`
	`4`	`+class InvalidCodonError < StandardError; end`
	`5`	`+class Translation`
	`6`	`+ CODON_PROTEIN_MAP = {`
	`7`	`+ "AUG" => "Methionine",`
	`8`	`+ "UUU" => "Phenylalanine",`
	`9`	`+ "UUC" => "Phenylalanine",`
	`10`	`+ "UUA" => "Leucine",`
	`11`	`+ "UUG" => "Leucine",`
	`12`	`+ "UCU" => "Serine",`
	`13`	`+ "UCC" => "Serine",`
	`14`	`+ "UCA" => "Serine",`
	`15`	`+ "UCG" => "Serine",`
	`16`	`+ "UAU" => "Tyrosine",`
	`17`	`+ "UAC" => "Tyrosine",`
	`18`	`+ "UGU" => "Cysteine",`
	`19`	`+ "UGC" => "Cysteine",`
	`20`	`+ "UGG" => "Tryptophan"`
	`21`	`+ }`
	`22`	`+ STOP_CODONS = ["UAA", "UAG", "UGA"]`
	`23`	`+`
	`24`	`+ def self.of_rna(strand)`
	`25`	`+ return [] if strand.empty?`
	`26`	`+ raise InvalidCodonError if strand.length < 3`
	`27`	`+ codon = strand[0, 3]`
	`28`	`+ return [] if STOP_CODONS.include?(codon)`
	`29`	`+ raise InvalidCodonError if CODON_PROTEIN_MAP[codon].nil?`
	`30`	`+ [CODON_PROTEIN_MAP[codon]] + of_rna(strand[3..-1])`
	`31`	`+ end`
	`32`	`+end`

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