add similarity functions

shared/inc/values/Similarity.hpp

@@ -0,0 +1,16 @@
+#include "Dna.hpp"
+#include <vector>
+
+namespace Similarity
+{
+  // float euclidean_distance(Dna *d1, Dna *d2); direct distance betwen vector. wont give 0 and 1
+  //  float dot_product(Dna *d1, Dna *d2); doent return betwen 0 to 1
+  float cosine_similarity(Dna *d1, Dna *d2);
+  float hamming_distance(Dna *d1, Dna *d2);
+  float jaccard_index(Dna *d1, Dna *d2);
+  float levenshtein_distance(Dna *d1, Dna *d2);
+  // float needleman_wunsch(Dna *d1, Dna *d2); used for bioinformatics and aligment. Dont need its aligned alredy
+
+  typedef float(simil_func)(Dna *d1, Dna *d2);
+  float calc_similarity(std::vector<Dna> vec, simil_func f);
+}