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Algorithms and Data Structures implemented in Java

This is a collection of algorithms and data structures which I've implement over the years in my academic and professional life. The code isn't overly-optimized but is written to be correct and readable. The algorithms and data structures are well tested and, unless noted, are believe to be 100% correct.

Created by Justin Wetherell

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What's been implemented:

Table of Contents

Data Structures

Mathematics

Numbers

  • Integers
    • to binary String
      • using divide and modulus
      • using right shift and modulus
      • using BigDecimal
      • using divide and double
    • is a power of 2
      • using a loop
      • using recursion
      • using logarithm
      • using bits
    • to English (e.g. 1 would return "one")
  • Longs
    • to binary String
      • using divide and modulus
      • using right shift and modulus
      • using BigDecimal
  • Complex
    • addition
    • subtraction
    • multiplication
    • absolute value
    • polar value

Graphs

Search

Sequences

Sorts

String Functions

  • Reverse characters in a string
    • using additional storage (a String or StringBuilder)
    • using in-place swaps
    • using in-place XOR
  • Reverse words in a string
    • using char swaps and additional storage (a StringBuilder)
    • using StringTokenizer and additional (a String)
    • using split() method and additional storage (a StringBuilder and String[])
    • using in-place swaps
  • Is Palindrome
    • using additional storage (a StringBuilder)
    • using in-place symetric element compares
  • Subsets of characters in a String
  • Edit (Levenshtein) Distance of two Strings (Recursive, Iterative)
  • Find in lexicographically minimal string rotation
  • Find in lexicographically maximal string rotation

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