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          • Countries Capitals for Trivia Night (SQL for Beginners #6)
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          • Adults only (SQL for Beginners #1)
      • Codewars
        • 4kyu
          • Strings Mix
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          • Simple Pig Latin
        • 6kyu
          • Street Fighter 2 - Character Selection
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          • Design a Simple Automaton (Finite State Machine)
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          • Sum The Tree
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          • The Enigma Machine - Part 1: The Plugboard
          • If you can read this...
          • [draft]1/n- Cycle
          • Berlin Clock
          • Simple Fun #265: The Janitor And His Mop
          • Function Composition
          • Coordinates Validator
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          • Two Joggers
          • The Deaf Rats of Hamelin
          • Roman Numerals Decoder
        • 7kyu
          • Even numbers in an array
          • The highest profit wins!
          • Remove the minimum
          • Small enough? - Beginner
          • Compare Strings by Sum of Chars
          • Convert a linked list to a string
          • Halving Sum
          • My Languages
          • Folding your way to the moon
          • Gauß needs help! (Sums of a lot of numbers).
          • Sum of angles
          • Sum of Triangular Numbers
          • Flatten and sort an array
          • Triangular Treasure
          • Sorted? yes? no? how?
          • Most digits
          • Are the numbers in order?
          • Sort array by string length
          • Make a function that does arithmetic!
          • Find the stray number
          • two fighters, one winner.
          • Don't give me five!
          • Sum of the first nth term of Series
          • Largest 5 digit number in a series
          • Palindrome chain length
          • Sum of a sequence
          • Form The Largest
          • Credit Card Mask
          • List Filtering
          • Beginner Series #3 Sum of Numbers
          • Find the divisors!
          • Is this a triangle?
          • Find the next perfect square!
          • Square Every Digit
          • Every possible sum of two digits
          • A Gift Well Spent
          • Exclamation marks series #3: Remove all exclamation marks from sentence except at the end
          • Simple Fun #215: Properly Closed Bracket Word
          • Bit Plane Return
          • Playing with Sets : Sup/Sub
          • All Star Code Challenge #22
          • Simple Fun #213: Is Function?
          • Consecutive letters
          • Maximum Length Difference
          • L2: Triple X
          • Simple Fun #136: Missing Values
          • Merge two arrays
        • 8Kyu
          • Grasshopper - Array Mean
          • Lario and Muigi Pipe Problem
          • Add Length
          • Duck Duck Goose
          • Reverse List Order
          • Welcome!
          • Heads and Legs
          • Collatz Conjecture (3n+1)
          • Pirates!! Are the Cannons ready!??
          • The falling speed of petals
          • Formatting decimal places #0
          • Merge two sorted arrays into one
          • Find the Difference in Age between Oldest and Youngest Family Members
          • Convert to Binary
          • Thinkful - Number Drills: Pixelart planning
          • Holiday VIII - Duty Free
          • Closest elevator
          • Surface Area and Volume of a Box
          • Bin to Decimal
          • Is it even?
          • Check the exam
          • Hex to Decimal
          • Watermelon
          • Can we divide it?
          • Parse float
          • Twice as old
          • Get Nth Even Number
          • No zeros for heros
          • Volume of a Cuboid
          • Parse nice int from char problem
          • Will there be enough space?
          • Reversed Words
          • Short Long Short
          • Vowel remover
          • Beginner - Reduce but Grow
          • To square(root) or not to square(root)
          • Get the mean of an array
          • Count Odd Numbers below n
          • Convert a String to a Number!
          • You only need one - Beginner
          • Invert values
          • Keep Hydrated!
          • Convert a Number to a String!
          • Return Negative
          • Count of positives / sum of negatives
          • Square(n) Sum
          • Basic Mathematical Operations
          • Geometry Basics: Distance between points in 2D
          • Find the smallest integer in the array
          • Simple validation of a username with regex
          • Exclamation marks series #11: Replace all vowel to exclamation mark in the sentence
          • Removing Elements
          • Stringy Strings
          • Correct the mistakes of the character recognition software
          • Double Char
          • Rock Paper Scissors!
          • Count by X
          • Coefficients of the Quadratic Equation
          • Dollars and Cents
          • ES6 string addition
          • Character Frequency
          • SpeedCode #2 - Array Madness
    • Famous Algorithm Problems
      • Deterministic finite automaton
      • Fibonacci
      • Wheat and chessboard problem
    • Algorithm Technic & Optimization
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        • array compare optimize
      • Python Algorithm Technic
  • OpenStack
    • Manage IP addresses
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  • Good things to know
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      • Untitled
  • BOOK-REVIEW
    • Tech
      • [KR-230607] 가상 면접 사례로 배우는 대규모 시스템 설계 기초 (원제 : System Design Interview)
      • [KR-2001061] '빅데이터를 지탱하는 기술' 리뷰
      • [KR-2001060] '성당과 시장' 리뷰
    • Candidates to read
    • Human Mind & Behavior
      • Unlimited Memory
      • Everybody Lies
    • Economics & Stock
      • One Up On Wall Street
    • Productivity
      • Get Organized: Do More in Less Time
  • quick-reference
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      • IDE / JetBrains / PyCharm
      • dev-env
        • web-storm
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    • Front-end
      • next.js
  • -------------------------------
  • ⇣ ⇣Legacy⇣ ⇣
  • -------------------------------
  • Cheat-sheet
    • JavaScript
      • eslint
    • ETC
      • [cheat-sheet] Git
  • -------------------------------
  • ⇣ ⇣Korean Contents ⇣ ⇣
  • -------------------------------
  • [kr] Tech-knowledge
    • Article
      • [KR-1912150] 모던 소프트웨어 개발, 배포 라이프사이클
  • [kr] dive-into
    • Software Design Principle
      • [KR-2001110] DRY - don't repeat yourself
  • [kr] Book-review
    • Candidates to read
  • ETC
    • Personal notes
      • [review] AWS Innovate Online Conference –AI and Machine Learning Edition
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