{
   "slug":"scala",
   "language":"Scala",
   "repository":"https://github.com/exercism/xscala",
   "active":true,
   "exercises":[
      {
         "slug":"hello-world",
         "difficulty":1,
         "topics":[
            "Strings"
         ]
      },
      {
         "slug":"bob",
         "difficulty":1,
         "topics":[
            "Strings",
            "Control-flow (if-else statements)",
            "Pattern matching"
         ]
      },
      {
         "slug":"sum-of-multiples",
         "difficulty":1,
         "topics":[
            "Filtering",
            "Sets"
         ]
      },
      {
         "slug":"leap",
         "difficulty":1,
         "topics":[
            "Integers",
            "Mathematics"
         ]
      },
      {
         "slug":"space-age",
         "difficulty":1,
         "topics":[
            "Dates",
            "Enumerations",
            "Domain-specific languages"
         ]
      },      
      {
         "slug":"gigasecond",
         "difficulty":1,
         "topics":[
            "Dates",
            "Time",
            "Function Overloading"
         ]
      },
      {
         "slug":"difference-of-squares",
         "difficulty":1,
         "topics":[
            "Integers",
            "Mathematics"
         ]
      },  
      {
         "slug":"pangram",
         "difficulty":2,
         "topics":[
            "Strings"
         ]
      },
      {
         "slug":"grade-school",
         "difficulty":2,
         "topics":[
            "Maps",
            "Sequences",
            "Sorting"
         ]
      }, 
      {
         "slug":"accumulate",
         "difficulty":2,
         "topics":[
            "Generics",
            "Lists",
            "Transforming"
         ]
      }, 
      {
         "slug":"raindrops",
         "difficulty":2,
         "topics":[
            "Strings",
            "Logic",
            "Transforming"
         ]
      },
      {
         "slug":"perfect-numbers",
         "difficulty":2,
         "topics":[
            "Enumerations",
            "Integers",
            "Mathematics"
         ]
      },                          
      {
         "slug":"hamming",
         "difficulty":3,
         "topics":[
            "Strings",
            "Filtering",
            "Optional values"
         ]
      },
      {
         "slug":"phone-number",
         "difficulty":3,
         "topics":[
            "Optional values",
            "Strings",
            "Parsing",
            "Transforming"
         ]
      },
      {
         "slug":"strain",
         "difficulty":3,
         "topics":[
            "Generics",
            "Sequences",
            "Filtering"
         ]
      },
      {
         "slug":"robot-name",
         "difficulty":3,
         "topics":[
            "Strings",
            "Randomness"
         ]
      },
      {
         "slug":"etl",
         "difficulty":3,
         "topics":[
            "Lists",
            "Maps",
            "Sequences",
            "Strings",
            "Transforming"
         ]
      },
      {
         "slug":"grains",
         "difficulty":3,
         "topics":[
            "Optional values",
            "Mathematics"
         ]
      },
      {
         "slug":"scrabble-score",
         "difficulty":3,
         "topics":[
            "Strings",
            "Transforming"
         ]
      },      
      {
         "slug":"rna-transcription",
         "difficulty":3,
         "topics":[
            "Optional values",
            "Strings",
            "Transforming"
         ]
      },
      {
         "slug":"triangle",
         "difficulty":3,
         "topics":[
            "Enumerations",
            "Mathematics"
         ]
      },
      {
         "slug":"binary-search",
         "difficulty":3,
         "topics":[
            "Searching",
            "Arrays",
            "Optional values"
         ]
      },            
      {
         "slug":"secret-handshake",
         "difficulty":3,
         "topics":[
            "Lists",
            "Strings",
            "Bitwise operations"
         ]
      },
      {
         "slug":"sieve",
         "difficulty":3,
         "topics":[
            "Filtering",
            "Mathematics",
            "Lists"
         ]
      },
      {
         "slug":"robot-simulator",
         "difficulty":3,
         "topics":[
            "Enumerations",
            "Tuples"
         ]
      },
      {
         "slug":"isogram",
         "difficulty":3,
         "topics":[
            "Strings",
            "Filtering"
         ]
      },
      {
         "slug":"clock",
         "difficulty":3,
         "topics":[
            "Time",
            "Structural equality"
         ]
      },
      {
         "slug":"protein-translation",
         "difficulty":3,
         "topics":[
            "Strings",
            "Transforming",
            "Sequences"
         ]
      },
      {
        "slug": "beer-song",
        "difficulty": 3,
        "topics": [
          "Text formatting",
          "Algorithms",
          "Control-flow",
          "Strings"
        ]
      },      
      {
         "slug":"matrix",
         "difficulty":4,
         "topics":[
            "Strings",
            "Matrices",
            "Parsing",
            "Vectors"
         ]
      },
      {
         "slug":"house",
         "difficulty":4,
         "topics":[
            "Strings",
            "Text formatting",
            "Algorithms"
         ]
      },
      {
         "slug":"series",
         "difficulty":4,
         "topics":[
            "Strings",
            "Sequences",
            "Transforming"
         ]
      },
      {
         "slug":"word-count",
         "difficulty":4,
         "topics":[
            "Maps",
            "Strings",
            "Transforming"
         ]
      },
      {
         "slug":"anagram",
         "difficulty":4,
         "topics":[
            "Sequences",
            "Strings",
            "Filtering"
         ]
      },
      {
         "slug":"nucleotide-count",
         "difficulty":4,
         "topics":[
            "Maps",
            "Strings"
         ]
      },
      {
         "slug":"meetup",
         "difficulty":4,
         "topics":[
            "Dates"
         ]
      },
      {
         "slug":"prime-factors",
         "difficulty":4,
         "topics":[
            "Lists",
            "Integers",
            "Algorithms",
            "Mathematics"
         ]
      },
      {
         "slug":"allergies",
         "difficulty":4,
         "topics":[
            "Lists",
            "Enumerations",
            "Filtering"
         ]
      },
      {
         "slug":"all-your-base",
         "difficulty":4,
         "topics":[
            "Integers",
            "Lists",
            "Optional values",
            "Mathematics",
            "Transforming"
         ]
      },
      {
         "slug":"kindergarten-garden",
         "difficulty":4,
         "topics":[
            "Enumerations",
            "Transforming",
            "Lists"
         ]
      },
      {
         "slug":"largest-series-product",
         "difficulty":4,
         "topics":[
            "Strings",
            "Integers",
            "Optional values",
            "Transforming",
            "Mathematics"
         ]
      },
      {
         "slug":"pascals-triangle",
         "difficulty":4,
         "topics":[
            "Control-flow (loops)",
            "Lists",
            "Mathematics"
         ]
      },
      {
         "slug":"pythagorean-triplet",
         "difficulty":4,
         "topics":[
            "Integers",
            "Mathematics",
            "Sequences",
            "Tuples"
         ]
      },
      {
         "slug":"saddle-points",
         "difficulty":4,
         "topics":[
            "Matrices",
            "Lists",
            "Sets",
            "Tuples"
         ]
      },
      {
         "slug":"acronym",
         "difficulty":4,
         "topics":[
            "Strings",
            "Transforming"
         ]
      },
      {
         "slug":"run-length-encoding",
         "difficulty":5,
         "topics":[
            "Algorithms",
            "Transforming",
            "Strings"
         ]
      },      
      {
         "slug":"roman-numerals",
         "difficulty":5,
         "topics":[
            "Sequences",
            "Algorithms",
            "Transforming"
         ]
      },
      {
         "slug":"simple-linked-list",
         "difficulty":5,
         "topics":[
            "Classes",
            "Lists",
            "Transforming",
            "Generics"
         ]
      },
      {
         "slug":"atbash-cipher",
         "difficulty":5,
         "topics":[
            "Strings",
            "Transforming",
            "Security"
         ]
      },
      {
         "slug":"simple-cipher",
         "difficulty":5,
         "topics":[
            "Optional values",
            "Strings",
            "Algorithms",
            "Transforming"
         ]
      },
      {
         "slug":"bank-account",
         "difficulty":5,
         "topics":[
            "Parallellism"
         ]
      },
      {
         "slug":"crypto-square",
         "difficulty":5,
         "topics":[
            "Strings",
            "Lists",
            "Security",
            "Transforming"
         ]
      },
      {
         "slug":"bracket-push",
         "difficulty":5,
         "topics":[
            "Strings",
            "Parsing"
         ]
      },
      {
         "slug":"queen-attack",
         "difficulty":5,
         "topics":[
            "Strings",
            "Optional values",
            "Logic",
            "Games"
         ]
      },
      {
         "slug":"luhn",
         "difficulty":5,
         "topics":[
            "Strings",
            "Algorithms",
            "Transforming"
         ]
      },
      {
         "slug":"food-chain",
         "difficulty":5,
         "topics":[
            "Text formatting",
            "Algorithms"
         ]
      },
      {
         "slug":"linked-list",
         "difficulty":5,
         "topics":[
            "Lists",
            "Generics",
            "Optional values"
         ]
      },
      {
         "slug":"custom-set",
         "difficulty":5,
         "topics":[
            "Sets",
            "Lists",
            "Generics"
         ]
      },
      {
         "slug":"parallel-letter-frequency",
         "difficulty":5,
         "topics":[
            "Maps",
            "Sequences",
            "Strings",
            "Parallellism",
            "Transforming",
            "Dictionaries"
         ]
      },
      {
         "slug":"nth-prime",
         "difficulty":6,
         "topics":[
            "Optional values",
            "Algorithms",
            "Mathematics"
         ]
      },
      {
         "slug":"palindrome-products",
         "difficulty":6,
         "topics":[
            "Sets",
            "Strings",
            "Tuples",
            "Algorithms"
         ]
      },
      {
         "slug":"ocr-numbers",
         "difficulty":6,
         "topics":[
            "Lists",
            "Strings",
            "Parsing",
            "Pattern recognition",
            "Transforming"
         ]
      },
       {
         "slug":"pig-latin",
         "difficulty":6,
         "topics":[
            "Strings",
            "Transforming"
         ]
      },
      {
         "slug":"binary-search-tree",
         "difficulty":6,
         "topics":[
            "Searching",
            "Lists",
            "Trees",
            "Generics"
         ]
      },
      {
         "slug":"rail-fence-cipher",
         "difficulty":6,
         "topics":[
            "Strings",
            "Algorithms",
            "Transforming"
         ]
      },
      {
         "slug":"bowling",
         "difficulty":6,
         "topics":[
            "Algorithms",
            "Control-flow (if-else statements)",
            "Lists"
         ]
      },      
      {
         "slug":"dominoes",
         "difficulty":7,
         "topics":[
            "Lists",
            "Optional values",
            "Tuples",
            "Games"
         ]
      },
     {
         "slug":"sublist",
         "difficulty":7,
         "topics":[
            "Generics",
            "Enumerations",
            "Lists"
         ]
      },
      {
         "slug":"minesweeper",
         "difficulty":7,
         "topics":[
            "Lists",
            "Strings",
            "Parsing",
            "Transforming"
         ]
      },
      {
         "slug":"wordy",
         "difficulty":7,
         "topics":[
            "Mathematics",
            "Optional values",
            "Parsing",
            "Strings",
            "Transforming"
         ]
      },
      {
         "slug":"change",
         "difficulty":7,
         "topics":[
            "Integers",
            "Lists",
            "Optional values",
            "Mathematics"
         ]
      },
      {
         "slug":"connect",
         "difficulty":8,
         "topics":[
            "Recursion",
            "Graphs",
            "Optional values",
            "Algorithms",
            "Games",
            "Searching"
         ]
      },
      {
         "slug":"zebra-puzzle",
         "difficulty":8,
         "topics":[
            "Logic"
         ]
      },
      {
         "slug":"say",
         "difficulty":8,
         "topics":[
            "Strings",
            "Transforming",
            "Text formatting",
            "Optional values"
         ]
      },
      {
         "slug":"alphametics",
         "difficulty":9,
         "topics":[
            "Maps",
            "Optional values",
            "Strings",
            "Parsing"
         ]
      },
      {
         "slug":"sgf-parsing",
         "difficulty":9,
         "topics":[
            "Parsing",
            "Transforming"
         ]
      },
      {
         "slug":"lens-person",
         "difficulty":9,
         "topics":[

         ]
      },
      {
         "slug":"variable-length-quantity",
         "difficulty":9,
         "topics":[
            "Discriminated unions",
            "Lists",
            "Algorithms",
            "Bitwise operations"
         ]
      },
      {
         "slug":"zipper",
         "difficulty":10,
         "topics":[
            "Generics",
            "Optional values",
            "Trees"
         ]
      },
      {
         "slug":"forth",
         "difficulty":10,
         "topics":[
            "Strings",
            "Mathematics",
            "Parsing"
         ]
      }
   ],
   "deprecated":[
      "binary",
      "hexadecimal",
      "octal",
      "trinary"
   ],
   "ignored":[
      "docs",
      "img",
      "project",
      "target",
      "testgen"
   ],
   "foregone":[

   ]
}