{
  "slug": "lua",
  "language": "Lua",
  "repository": "https://github.com/exercism/xlua",
  "active": true,
  "test_pattern": ".*spec[.]lua$",
  "exercises": [{
    "slug": "hello-world",
    "difficulty": 1,
    "topics": [
      "control-flow (if-statements)",
      "optional values",
      "text formatting"
    ]
  }, {
    "slug": "accumulate",
    "difficulty": 2,
    "topics": [
      "arrays",
      "control-flow (loops)"
    ]
  }, {
    "slug": "hamming",
    "difficulty": 2,
    "topics": [
      "strings",
      "control-flow (loops)"
    ]
  }, {
    "slug": "house",
    "difficulty": 3,
    "topics": [
      "strings",
      "text formatting",
      "control-flow (loops)"
    ]
  }, {
    "slug": "raindrops",
    "difficulty": 1,
    "topics": [
      "strings",
      "control-flow (if-else statements)"
    ]
  }, {
    "slug": "bob",
    "difficulty": 3,
    "topics": [
      "strings",
      "control-flow (if-else statements)"
    ]
  }, {
    "slug": "difference-of-squares",
    "difficulty": 2,
    "topics": [
      "mathematics"
    ]
  }, {
    "slug": "variable-length-quantity",
    "difficulty": 6,
    "topics": [
      "control-flow (if-else statements)",
      "control-flow (loops)",
      "bitwise operations",
      "arrays"
    ]
  }, {
    "slug": "anagram",
    "difficulty": 6,
    "topics": [
      "strings",
      "algorithms",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "octal",
    "difficulty": 4,
    "topics": [
      "strings",
      "bitwise operations",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "binary-search",
    "difficulty": 4,
    "topics": [
      "arrays",
      "algorithms",
      "searching",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "bracket-push",
    "difficulty": 5,
    "topics": [
      "stacks",
      "strings",
      "algorithms",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "flatten-array",
    "difficulty": 5,
    "topics": [
      "arrays",
      "recursion",
      "algorithms",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "word-count",
    "difficulty": 3,
    "topics": [
      "strings",
      "control-flow (loops)"
    ]
  }, {
    "slug": "pangram",
    "difficulty": 3,
    "topics": [
      "strings",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "matrix",
    "difficulty": 3,
    "topics": [
      "matrices",
      "arrays",
      "control-flow (loops)"
    ]
  }, {
    "slug": "beer-song",
    "difficulty": 3,
    "topics": [
      "strings",
      "text formatting",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "isogram",
    "difficulty": 2,
    "topics": [
      "strings",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "perfect-numbers",
    "difficulty": 3,
    "topics": [
      "mathematics",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "etl",
    "difficulty": 3,
    "topics": [
      "transforming",
      "control-flow (loops)"
    ]
  }, {
    "slug": "nucleotide-count",
    "difficulty": 3,
    "topics": [
      "strings",
      "exception handling",
      "control-flow (loops)"
    ]
  }, {
    "slug": "food-chain",
    "difficulty": 3,
    "topics": [
      "strings",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "sum-of-multiples",
    "difficulty": 2,
    "topics": [
      "mathematics",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "rna-transcription",
    "difficulty": 3,
    "topics": [
      "strings",
      "transforming",
      "control-flow (loops)"
    ]
  }, {
    "slug": "phone-number",
    "difficulty": 3,
    "topics": [
      "strings",
      "text formatting",
      "control-flow (if-else statements)"
    ]
  }, {
    "slug": "bank-account",
    "difficulty": 3,
    "topics": [
      "classes",
      "control-flow (if-else statements)"
    ]
  }, {
    "slug": "protein-translation",
    "difficulty": 3,
    "topics": [
      "strings",
      "control-flow (if-else statements)",
      "control-flow (loops)",
      "exception handling"
    ]
  }, {
    "slug": "grade-school",
    "difficulty": 4,
    "topics": [
      "classes",
      "control-flow (if-else statements)"
    ]
  }, {
    "slug": "nth-prime",
    "difficulty": 4,
    "topics": [
      "mathematics",
      "control-flow (if-else statements)",
      "control-flow (loops)",
      "exception handling"
    ]
  }, {
    "slug": "diamond",
    "difficulty": 4,
    "topics": [
      "control-flow (loops)",
      "strings",
      "text formatting",
      "algorithms"
    ]
  }, {
    "slug": "run-length-encoding",
    "difficulty": 5,
    "topics": [
      "strings",
      "algorithms",
      "text formatting",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "sublist",
    "difficulty": 4,
    "topics": [
      "arrays",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "robot-name",
    "difficulty": 4,
    "topics": [
      "strings",
      "randomness",
      "text formatting"
    ]
  }, {
    "slug": "robot-simulator",
    "difficulty": 3,
    "topics": [
      "strings",
      "classes",
      "exception handling"
    ]
  }, {
    "slug": "pythagorean-triplet",
    "difficulty": 3,
    "topics": [
      "mathematics",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "leap",
    "difficulty": 1,
    "topics": [
      "logic",
      "control-flow (if-else statements)"
    ]
  }, {
    "slug": "space-age",
    "difficulty": 2,
    "topics": [
      "classes"
    ]
  }, {
    "slug": "pascals-triangle",
    "difficulty": 5,
    "topics": [
      "mathematics",
      "control-flow (loops)"
    ]
  }, {
    "slug": "sieve",
    "difficulty": 4,
    "topics": [
      "mathematics",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "grains",
    "difficulty": 2,
    "topics": [
      "control-flow (loops)"
    ]
  }, {
    "slug": "kindergarten-garden",
    "difficulty": 5,
    "topics": [
      "strings",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "custom-set",
    "difficulty": 6,
    "topics": [
      "classes",
      "sets",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "gigasecond",
    "difficulty": 2,
    "topics": [
      "time"
    ]
  }, {
    "slug": "word-search",
    "difficulty": 7,
    "topics": [
      "strings",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "luhn",
    "difficulty": 4,
    "topics": [
      "strings",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "triangle",
    "difficulty": 3,
    "topics": [
      "control-flow (if-else statements)",
      "exception handling"
    ]
  }, {
    "slug": "clock",
    "difficulty": 3,
    "topics": [
      "classes"
    ]
  }, {
    "slug": "series",
    "difficulty": 4,
    "topics": [
      "coroutines",
      "arrays",
      "control-flow (loops)"
    ]
  }, {
    "slug": "linked-list",
    "difficulty": 4,
    "topics": [
      "classes",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "ocr-numbers",
    "difficulty": 7,
    "topics": [
      "strings",
      "control-flow (loops)"
    ]
  }, {
    "slug": "pig-latin",
    "difficulty": 5,
    "topics": [
      "strings",
      "text formatting",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "minesweeper",
    "difficulty": 7,
    "topics": [
      "arrays",
      "strings",
      "control-flow (if-else statements)",
      "control-flow (loops)",
      "exception handling"
    ]
  }, {
    "slug": "crypto-square",
    "difficulty": 5,
    "topics": [
      "strings",
      "text formatting",
      "control-flow (loops)"
    ]
  }, {
    "slug": "list-ops",
    "difficulty": 4,
    "topics": [
      "arrays",
      "filtering",
      "control-flow (loops)"
    ]
  }, {
    "slug": "meetup",
    "difficulty": 6,
    "topics": [
      "time",
      "control-flow (if-statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "atbash-cipher",
    "difficulty": 3,
    "topics": [
      "strings",
      "text formatting",
      "control-flow (loops)"
    ]
  }, {
    "slug": "scrabble-score",
    "difficulty": 3,
    "topics": [
      "strings",
      "control-flow (loops)"
    ]
  }, {
    "slug": "largest-series-product",
    "difficulty": 5,
    "topics": [
      "control-flow (loops)",
      "exception handling"
    ]
  }, {
    "slug": "rail-fence-cipher",
    "difficulty": 7,
    "topics": [
      "strings",
      "text formatting",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "roman-numerals",
    "difficulty": 4,
    "topics": [
      "strings",
      "text formatting",
      "control-flow (loops)"
    ]
  }, {
    "slug": "transpose",
    "difficulty": 7,
    "topics": [
      "strings",
      "algorithms",
      "control-flow (loops)"
    ]
  }, {
    "slug": "tournament",
    "difficulty": 5,
    "topics": [
      "arrays",
      "strings",
      "text formatting",
      "text parsing",
      "control-flow (loops)"
    ]
  }, {
    "slug": "circular-buffer",
    "difficulty": 4,
    "topics": [
      "classes",
      "control-flow (if-else statements)",
      "exception handling"
    ]
  }, {
    "slug": "binary-search-tree",
    "difficulty": 5,
    "topics": [
      "coroutines",
      "trees",
      "algorithms",
      "searching",
      "recursion",
      "exception handling"
    ]
  }, {
    "slug": "bowling",
    "difficulty": 4,
    "topics": [
      "algorithms",
      "control-flow (if-else statements)",
      "exception handling"
    ]
  }, {
    "slug": "binary",
    "difficulty": 3,
    "topics": [
      "strings",
      "bitwise operations",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "alphametics",
    "difficulty": 8,
    "topics": [
      "strings",
      "algorithms",
      "performance",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "prime-factors",
    "difficulty": 4,
    "topics": [
      "mathematics",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "acronym",
    "difficulty": 4,
    "topics": [
      "strings",
      "control-flow (loops)"
    ]
  }, {
    "slug": "all-your-base",
    "difficulty": 4,
    "topics": [
      "mathematics",
      "arrays",
      "control-flow (loops)"
    ]
  }, {
    "slug": "rectangles",
    "difficulty": 8,
    "topics": [
      "strings",
      "performance",
      "control-flow (if-else statements)",
      "control-flow (loops)",
      "algorithms"
    ]
  }, {
    "slug": "allergies",
    "difficulty": 4,
    "topics": [
      "bitwise operations",
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "say",
    "difficulty": 7,
    "topics": [
      "strings",
      "text formatting",
      "control-flow (loops)"
    ]
  }, {
    "slug": "pov",
    "difficulty": 9,
    "topics": [
      "graphs",
      "algorithms",
      "control-flow (if-else statements)",
      "control-flow (loops)",
      "exception handling"
    ]
  }, {
    "slug": "change",
    "difficulty": 4,
    "topics": [
      "control-flow (if-else statements)",
      "control-flow (loops)"
    ]
  }, {
    "slug": "secret-handshake",
    "difficulty": 3,
    "topics": [
      "control-flow (if-else statements)",
      "arrays",
      "bitwise operations"
    ]
  }],
  "deprecated": [

  ],
  "ignored": [
    "docs"
  ],
  "foregone": [

  ]
}