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Strings Comparison Algorithms (or Strings Similarities)

In coding, when ever you want to be smarter than comparing if 2 strings are perfectly equal  ( “abc” == “abd” ? ) … like how much is the first string different from the 2nd (like if the user entered something with a typo) , you have the choices between several algorithms, each with pros and cons or made for special cases.

Well, this site is exactly for this: provide two sample strings and it will apply several algorithms and tell you the differences. Depending on the strings you want to identify,, in a couple of tests, you know the best algorithm and threshold to apply for your case. It tests all of these in one go and return a strings similarity percentage:

  • Levenshtein
  • NeedlemanWunch
  • Smith-Waterman
  • Smith-Waterman Gotoh
  • Smith-Waterman Gotoh Windowed Affine
  • Jaro
  • Jaro Winkler
  • QGrams Distance
  • Block Distance
  • Cosine Similarity
  • Euclidean Distance
  • Chapman Length Deviation
  • Overlap Coefficient

(some being directly integrated in your favorite language, some needed external libraries or be coded by you)

Note: the site is behind a bot-blocking wall, Cloudflare-like, annoying, but nothing very special (except the ugly screenshot for us)

Topics covered: Strings Comparison, Strings Similarities, Levenshtein, Needleman-Wunsch, Smith-Waterman, Jaro, Jaro-Winkler, Q-Grams Distance, Block Distance, Cosine Similarity, Euclidean Distance, Chapman Length Deviation, Overlap Coefficient, Algorithm, Threshold, Similarity Percentage, Typo DetectionISO/IEC 30170, ISO/IEC 24765, ISO/IEC 25010, ISO/IEC 25012, and ISO/IEC 25051..

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