config.json

{
  "language": "JavaScript",
  "slug": "javascript",
  "active": true,
  "status": {
    "concept_exercises": true,
    "test_runner": true,
    "representer": true,
    "analyzer": true
  },
  "blurb": "JavaScript is a scripting language, primarily used for creating dynamic websites and programming web servers. It's a very popular language, and supports a variety of programming paradigms.",
  "version": 3,
  "online_editor": {
    "indent_style": "space",
    "indent_size": 2,
    "highlightjs_language": "javascript"
  },
  "test_runner": {
    "average_run_time": 5
  },
  "files": {
    "solution": [
      "%{kebab_slug}.js"
    ],
    "test": [
      "%{kebab_slug}.spec.js"
    ],
    "example": [
      ".meta/proof.ci.js"
    ],
    "exemplar": [
      ".meta/exemplar.js"
    ]
  },
  "exercises": {
    "concept": [
      {
        "slug": "lasagna",
        "name": "Lucian's Luscious Lasagna",
        "uuid": "97bf898a-36fc-47fc-b870-01fc0c7fe554",
        "concepts": [
          "basics"
        ],
        "prerequisites": [],
        "status": "active"
      },
      {
        "slug": "annalyns-infiltration",
        "name": "Annalyn's Infiltration",
        "uuid": "5acafcbb-20a0-45b9-b276-3d167e0de313",
        "concepts": [
          "booleans"
        ],
        "prerequisites": [
          "basics"
        ],
        "status": "beta"
      },
      {
        "slug": "freelancer-rates",
        "name": "Freelancer Rates",
        "uuid": "0aff2fa7-55ea-47e9-af4a-78927d916baf",
        "concepts": [
          "numbers",
          "arithmetic-operators"
        ],
        "prerequisites": [
          "basics"
        ],
        "status": "beta"
      },
      {
        "slug": "poetry-club-door-policy",
        "name": "Poetry Club Door Policy",
        "uuid": "39549583-1889-490a-bf98-ffb2e0aefe44",
        "concepts": [
          "strings"
        ],
        "prerequisites": [
          "basics"
        ],
        "status": "beta"
      },
      {
        "slug": "elyses-enchantments",
        "name": "Elyses Enchantments",
        "uuid": "25cb0707-44f8-4800-b993-3fcb2b6d9f61",
        "concepts": [
          "arrays"
        ],
        "prerequisites": [
          "numbers"
        ],
        "status": "beta"
      },
      {
        "slug": "vehicle-purchase",
        "name": "Vehicle Purchase",
        "uuid": "f75a7e2c-053a-411e-8b3d-f978a2c5100e",
        "concepts": [
          "comparison",
          "conditionals"
        ],
        "prerequisites": [
          "booleans",
          "numbers",
          "strings"
        ],
        "status": "beta"
      },
      {
        "slug": "bird-watcher",
        "name": "Bird Watcher",
        "uuid": "3e648aa0-9ce7-4041-93d2-2b95f3832824",
        "concepts": [
          "increment-decrement",
          "for-loops"
        ],
        "prerequisites": [
          "arrays",
          "comparison",
          "conditionals"
        ],
        "status": "beta"
      },
      {
        "slug": "mixed-juices",
        "name": "Mixed Juices",
        "uuid": "81c3fb86-af86-4c56-a45f-e021403c4070",
        "concepts": [
          "while-loops",
          "conditionals-switch"
        ],
        "prerequisites": [
          "comparison",
          "conditionals",
          "arrays"
        ],
        "status": "beta"
      },
      {
        "slug": "lucky-numbers",
        "name": "Lucky Numbers",
        "uuid": "78bbd7d2-b660-4791-a404-af5bfed31849",
        "concepts": [
          "type-conversion"
        ],
        "prerequisites": [
          "booleans",
          "strings",
          "numbers",
          "null-undefined",
          "arrays"
        ],
        "status": "beta"
      },
      {
        "slug": "elyses-analytic-enchantments",
        "name": "Elyses Analytic Enchantments",
        "uuid": "45d956db-d4ef-4468-b1d3-47021f172c15",
        "concepts": [
          "arrow-functions",
          "array-analysis"
        ],
        "prerequisites": [
          "arrays",
          "booleans",
          "callbacks",
          "numbers"
        ],
        "status": "beta"
      },
      {
        "slug": "elyses-destructured-enchantments",
        "name": "Elyses Destructured Enchantments",
        "uuid": "d9b5cd13-2f2b-4034-a571-e66c847ed6f8",
        "concepts": [
          "array-destructuring",
          "rest-and-spread"
        ],
        "prerequisites": [
          "arrays",
          "functions",
          "objects"
        ],
        "status": "beta"
      },
      {
        "slug": "elyses-looping-enchantments",
        "name": "Elyses Looping Enchantments",
        "uuid": "e06f8f70-019f-4cec-924b-3971414e15d9",
        "concepts": [
          "array-loops"
        ],
        "prerequisites": [
          "arrays",
          "arrow-functions",
          "callbacks",
          "for-loops",
          "conditionals"
        ],
        "status": "beta"
      },
      {
        "slug": "nullability",
        "name": "Employee Badges",
        "uuid": "19962010-7b8c-4db1-bdae-ffc857b268e5",
        "concepts": [],
        "prerequisites": [],
        "status": "deprecated"
      },
      {
        "slug": "amusement-park",
        "name": "Amusement Park",
        "uuid": "2d40b46b-9e49-431c-913c-81d1f42f74df",
        "concepts": [
          "null-undefined"
        ],
        "prerequisites": [
          "objects"
        ],
        "status": "beta"
      },
      {
        "slug": "pizza-order",
        "name": "Pizza Order",
        "uuid": "e9a9fa73-4497-43d5-a4ff-4eb319c98233",
        "concepts": [
          "recursion"
        ],
        "prerequisites": [
          "functions",
          "rest-and-spread",
          "array-destructuring",
          "array-transformations"
        ],
        "status": "beta"
      },
      {
        "slug": "coordinate-transformation",
        "name": "Coordinate Transformation",
        "uuid": "5aa39e89-c601-4a66-ab72-5d8512d69e02",
        "concepts": [
          "closures"
        ],
        "prerequisites": [
          "arrays",
          "functions"
        ],
        "status": "beta"
      },
      {
        "slug": "fruit-picker",
        "name": "Fruit Picker",
        "uuid": "a6348db8-cc2b-4c53-9f43-3c23248d66f0",
        "concepts": [
          "callbacks"
        ],
        "prerequisites": [
          "functions",
          "objects"
        ],
        "status": "beta"
      },
      {
        "slug": "translation-service",
        "name": "Translation Service",
        "uuid": "4a967656-8615-474e-a009-5c0b09f4386f",
        "concepts": [
          "promises"
        ],
        "prerequisites": [
          "callbacks",
          "arrow-functions",
          "errors"
        ],
        "status": "beta"
      },
      {
        "slug": "high-score-board",
        "name": "High Score Board",
        "uuid": "431d1f13-d280-4808-bbc6-a72e628c15c2",
        "concepts": [
          "objects"
        ],
        "prerequisites": [
          "for-loops"
        ],
        "status": "beta"
      },
      {
        "slug": "ozans-playlist",
        "name": "Ozan's Playlist",
        "uuid": "347692fb-7b0f-4ef0-9a02-2192b59bdf5d",
        "concepts": [
          "sets"
        ],
        "prerequisites": [
          "array-destructuring",
          "array-loops",
          "comparison",
          "rest-and-spread",
          "arrays",
          "classes"
        ],
        "status": "beta"
      },
      {
        "slug": "lasagna-master",
        "name": "Lasagna Master",
        "uuid": "a7e323f1-84d8-43d5-8c26-cc119166b9fd",
        "concepts": [
          "functions"
        ],
        "prerequisites": [
          "objects",
          "arrays",
          "null-undefined"
        ],
        "status": "beta"
      },
      {
        "slug": "factory-sensors",
        "name": "Factory Sensors",
        "uuid": "2ccafa38-2802-44c1-8758-7415edefa909",
        "concepts": [
          "errors",
          "inheritance"
        ],
        "prerequisites": [
          "classes",
          "null-undefined",
          "conditionals"
        ],
        "status": "beta"
      },
      {
        "slug": "elyses-transformative-enchantments",
        "name": "Elyses Transformative Enchantments",
        "uuid": "6e156d67-2bd2-4624-956d-ddcc3795bad5",
        "concepts": [
          "array-transformations"
        ],
        "prerequisites": [
          "arrow-functions",
          "numbers",
          "arrays",
          "conditionals",
          "callbacks"
        ],
        "status": "beta"
      },
      {
        "slug": "custom-signs",
        "name": "Custom Signs",
        "uuid": "02a9c753-614f-4814-a7a8-43c1971d2eb7",
        "concepts": [
          "conditionals-ternary",
          "template-strings"
        ],
        "prerequisites": [
          "strings",
          "conditionals",
          "type-conversion"
        ],
        "status": "beta"
      },
      {
        "slug": "windowing-system",
        "name": "Windowing System",
        "uuid": "d697850e-fd43-408c-a958-835aa8a510f7",
        "concepts": [
          "classes"
        ],
        "prerequisites": [
          "objects",
          "functions",
          "conditionals-ternary"
        ],
        "status": "beta"
      },
      {
        "slug": "regular-chatbot",
        "name": "Regular Chatbot",
        "uuid": "dc118a0d-be89-4ea5-a814-e471897d921a",
        "concepts": [
          "regular-expressions"
        ],
        "prerequisites": [
          "arrays",
          "classes",
          "objects",
          "template-strings"
        ],
        "status": "beta"
      }
    ],
    "practice": [
      {
        "slug": "hello-world",
        "name": "Hello World",
        "uuid": "9ce0f408-6d7b-4466-a390-75aeaf9492f2",
        "practices": [],
        "prerequisites": [],
        "difficulty": 1,
        "topics": [
          "conditionals",
          "optional_values",
          "strings",
          "text_formatting"
        ]
      },
      {
        "slug": "two-fer",
        "name": "Two Fer",
        "uuid": "7f49e997-4435-4f34-a020-bddc92c838ed",
        "practices": [],
        "prerequisites": [
          "strings",
          "functions"
        ],
        "difficulty": 1,
        "topics": [
          "optional_values",
          "strings",
          "text_formatting"
        ]
      },
      {
        "slug": "resistor-color",
        "name": "Resistor Color",
        "uuid": "53be6837-c224-45f1-bff3-d7f74d6285ce",
        "practices": [],
        "prerequisites": [
          "arrays",
          "array-analysis"
        ],
        "difficulty": 1,
        "topics": [
          "arrays",
          "strings"
        ]
      },
      {
        "slug": "resistor-color-duo",
        "name": "Resistor Color Duo",
        "uuid": "de800041-3dcc-41b9-b101-7314ff685c93",
        "practices": [],
        "prerequisites": [
          "array-analysis"
        ],
        "difficulty": 2,
        "topics": [
          "strings",
          "arrays"
        ]
      },
      {
        "slug": "gigasecond",
        "name": "Gigasecond",
        "uuid": "fd7b62d4-266b-4e84-a526-bf3d47901216",
        "practices": [],
        "prerequisites": [
          "dates",
          "numbers",
          "arithmetic-operators"
        ],
        "difficulty": 1,
        "topics": [
          "time"
        ]
      },
      {
        "slug": "rna-transcription",
        "name": "RNA Transcription",
        "uuid": "342974d6-9083-4754-a6c5-ed1e19e40ec5",
        "practices": [],
        "prerequisites": [
          "strings",
          "array-transformations",
          "objects"
        ],
        "difficulty": 2,
        "topics": [
          "strings",
          "transforming"
        ]
      },
      {
        "slug": "space-age",
        "name": "Space Age",
        "uuid": "d9d757ed-ebe6-4d4a-aa73-f6834221cd54",
        "practices": [],
        "prerequisites": [
          "objects",
          "numbers",
          "type-conversion"
        ],
        "difficulty": 2,
        "topics": [
          "floating_point_numbers"
        ]
      },
      {
        "slug": "pangram",
        "name": "Pangram",
        "uuid": "da5b2b34-a1a7-4970-81f9-4665d875398b",
        "practices": [],
        "prerequisites": [
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          "array-analysis"
        ],
        "difficulty": 2,
        "topics": [
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          "conditionals",
          "loops",
          "lists",
          "maps",
          "searching",
          "strings"
        ]
      },
      {
        "slug": "matrix",
        "name": "Matrix",
        "uuid": "dd0b5e67-81f6-437e-8334-2ec0dfeb862a",
        "practices": [],
        "prerequisites": [
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          "arrays",
          "classes",
          "array-transformations"
        ],
        "difficulty": 3,
        "topics": [
          "arrays",
          "conditionals",
          "loops",
          "matrices",
          "text_formatting"
        ]
      },
      {
        "slug": "bob",
        "name": "Bob",
        "uuid": "a5bf36f0-5d3c-41d4-8d54-e37e484e59cd",
        "practices": [],
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          "conditionals",
          "regular-expressions"
        ],
        "difficulty": 4,
        "topics": [
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          "pattern_recognition",
          "polymorphism",
          "regular_expressions",
          "strings"
        ]
      },
      {
        "slug": "book-store",
        "name": "Book Store",
        "uuid": "519e55eb-436b-437d-b9d1-b4b3c939f60d",
        "practices": [],
        "prerequisites": [
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          "for-loops",
          "conditionals",
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          "functions"
        ],
        "difficulty": 5,
        "topics": [
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          "conditionals",
          "loops",
          "lists",
          "sorting"
        ]
      },
      {
        "slug": "pascals-triangle",
        "name": "Pascal's Triangle",
        "uuid": "99493160-4673-402f-acda-62db5378148d",
        "practices": [],
        "prerequisites": [
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          "for-loops"
        ],
        "difficulty": 4,
        "topics": [
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          "loops",
          "math",
          "strings",
          "text_formatting"
        ]
      },
      {
        "slug": "linked-list",
        "name": "Linked List",
        "uuid": "ec60a578-8889-46a1-b7b8-306dbd8551d5",
        "practices": [],
        "prerequisites": [
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          "conditionals",
          "while-loops"
        ],
        "difficulty": 5,
        "topics": [
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          "conditionals",
          "data_structures",
          "loops",
          "lists",
          "optional_values"
        ]
      },
      {
        "slug": "grade-school",
        "name": "Grade School",
        "uuid": "64637322-33bc-401f-8cec-1f9810a41f75",
        "practices": [],
        "prerequisites": [
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          "objects",
          "array-transformations"
        ],
        "difficulty": 5,
        "topics": [
          "arrays",
          "maps",
          "sorting"
        ]
      },
      {
        "slug": "list-ops",
        "name": "List Ops",
        "uuid": "7d9db056-5398-41b6-af3b-9707f5eb0dbc",
        "practices": [],
        "prerequisites": [
          "classes",
          "arrays",
          "functions",
          "recursion"
        ],
        "difficulty": 6,
        "topics": [
          "data_structures",
          "loops",
          "lists",
          "recursion"
        ]
      },
      {
        "slug": "robot-name",
        "name": "Robot Name",
        "uuid": "03f4dfea-e6db-4754-b2c8-ca06c8b81ef1",
        "practices": [],
        "prerequisites": [
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          "arrays",
          "strings",
          "randomness",
          "codepoints"
        ],
        "difficulty": 6,
        "topics": [
          "conditionals",
          "exception_handling",
          "randomness",
          "regular_expressions",
          "sets"
        ]
      },
      {
        "slug": "simple-cipher",
        "name": "Simple Cipher",
        "uuid": "62d60b42-93bc-4de9-90d1-1ca18a847812",
        "practices": [],
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          "arrays",
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          "codepoints",
          "randomness"
        ],
        "difficulty": 6,
        "topics": [
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          "conditionals",
          "loops",
          "randomness",
          "strings",
          "text_formatting",
          "transforming"
        ]
      },
      {
        "slug": "wordy",
        "name": "Wordy",
        "uuid": "9131bdb8-2e0f-4526-b113-8a77712e7216",
        "practices": [],
        "prerequisites": [
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          "strings",
          "objects",
          "regular-expressions",
          "errors"
        ],
        "difficulty": 7,
        "topics": [
          "conditionals",
          "loops",
          "exception_handling",
          "parsing",
          "pattern_recognition",
          "regular_expressions",
          "strings"
        ]
      },
      {
        "slug": "secret-handshake",
        "name": "Secret Handshake",
        "uuid": "74bbc9e3-edc5-41e0-84d7-5b2d98dd8370",
        "practices": [],
        "prerequisites": [
          "bit-manipulation",
          "array-analysis",
          "errors"
        ],
        "difficulty": 6,
        "topics": [
          "algorithms",
          "arrays",
          "bitwise_operations",
          "conditionals",
          "loops",
          "games"
        ]
      },
      {
        "slug": "leap",
        "name": "Leap",
        "uuid": "193a0e19-462d-4d26-a117-124f07d5a3d7",
        "practices": [],
        "prerequisites": [
          "arithmetic-operators",
          "booleans"
        ],
        "difficulty": 1,
        "topics": [
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          "integers",
          "logic"
        ]
      },
      {
        "slug": "reverse-string",
        "name": "Reverse String",
        "uuid": "e84c97eb-dbec-487c-b99f-ae9924e16293",
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        ],
        "difficulty": 2,
        "topics": [
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        ]
      },
      {
        "slug": "collatz-conjecture",
        "name": "Collatz Conjecture",
        "uuid": "b8dacb3a-51d0-4da7-a6d2-aa29867e2b8c",
        "practices": [],
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      },
      {
        "slug": "triangle",
        "name": "Triangle",
        "uuid": "ed3ca73a-a0f0-46b8-8013-8b6d20758c8f",
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        ]
      },
      {
        "slug": "clock",
        "name": "Clock",
        "uuid": "4e0e2c30-be33-49b6-b196-213888a93a0c",
        "practices": [],
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          "numbers",
          "classes",
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        ],
        "difficulty": 5,
        "topics": [
          "dates",
          "globalization",
          "time"
        ]
      },
      {
        "slug": "meetup",
        "name": "Meetup",
        "uuid": "98617798-b49d-4d43-9f65-7131ee73d626",
        "practices": [],
        "prerequisites": [
          "dates",
          "array-analysis",
          "conditionals-switch"
        ],
        "difficulty": 7,
        "topics": [
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          "loops",
          "dates",
          "equality",
          "exception_handling",
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        ]
      },
      {
        "slug": "etl",
        "name": "ETL",
        "uuid": "db16804b-0f63-445d-8beb-99e0f7218d66",
        "practices": [],
        "prerequisites": [
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          "arrays",
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        ],
        "difficulty": 2,
        "topics": [
          "loops",
          "integers",
          "maps",
          "transforming"
        ]
      },
      {
        "slug": "hamming",
        "name": "Hamming",
        "uuid": "d773c4ef-c09e-40e4-a7fe-01456cb4a12a",
        "practices": [],
        "prerequisites": [
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          "errors",
          "for-loops"
        ],
        "difficulty": 2,
        "topics": [
          "conditionals",
          "loops",
          "equality",
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        ]
      },
      {
        "slug": "raindrops",
        "name": "Raindrops",
        "uuid": "f77ac2d1-cf3a-497d-bf04-b484a5a9cb37",
        "practices": [],
        "prerequisites": [
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          "strings",
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        ],
        "difficulty": 2,
        "topics": [
          "conditionals",
          "integers",
          "strings",
          "transforming"
        ]
      },
      {
        "slug": "nucleotide-count",
        "name": "Nucleotide Count",
        "uuid": "be6f3ab3-1593-4c2d-8a35-5f39c1d5c91f",
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      "name": "For Loops"
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      "name": "While Loops"
    },
    {
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      "name": "Switch Statement"
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      "uuid": "168cb8e8-c4f9-4e10-9d79-bffc77b86bbf",
      "slug": "conditionals-ternary",
      "name": "Ternary Operator"
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      "slug": "regular-expressions",
      "name": "Regular Expressions"
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  ],
  "key_features": [
    {
      "title": "Runs almost everywhere",
      "content": "Build web-pages, write backend, create database scripts, make mobile apps, design CLI-s, and more.",
      "icon": "cross-platform"
    },
    {
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    {
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      "content": "Dynamically and weakly typed by default, gain typed confidence using Flow, JSDoc, or TypeScript.",
      "icon": "dynamically-typed"
    },
    {
      "title": "Concurrency is safe",
      "content": "Async/await, dedicated workers, or state sync in shared workers. No deadlocks or race conditions.",
      "icon": "concurrency"
    },
    {
      "title": "Largest package registry",
      "content": "No need to reinvent the wheel. Build on top of > 1.3 million packages (April, 2020).",
      "icon": "tooling"
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    {
      "title": "Designed by a committee",
      "content": "Frequent updates, following ECMAScript, a general purpose, cross platform, vendor-neutral standard.",
      "icon": "community"
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  ],
  "tags": [
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    "used_for/games",
    "used_for/guis",
    "used_for/mobile",
    "used_for/scripts",
    "used_for/web_development"
  ]
}