config.json

{
  "language": "Emacs Lisp",
  "slug": "emacs-lisp",
  "active": true,
  "status": {
    "concept_exercises": false,
    "test_runner": true,
    "representer": false,
    "analyzer": false
  },
  "blurb": "Emacs Lisp is the extension language of the Emacs text editor. You can easily create you own extensions, which include preference files, but also full-fledged applications that use Emacs as a running environment in a fully integrated way.",
  "version": 3,
  "online_editor": {
    "indent_style": "space",
    "indent_size": 2,
    "highlightjs_language": "lisp"
  },
  "test_runner": {
    "average_run_time": 2
  },
  "files": {
    "solution": [
      "%{kebab_slug}.el"
    ],
    "test": [
      "%{kebab_slug}-test.el"
    ],
    "example": [
      ".meta/example.el"
    ],
    "exemplar": [
      ".meta/exemplar.el"
    ]
  },
  "exercises": {
    "practice": [
      {
        "slug": "acronym",
        "name": "Acronym",
        "uuid": "a252e137-8a63-4f26-b119-7264f12a257a",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "strings",
          "transforming"
        ]
      },
      {
        "slug": "allergies",
        "name": "Allergies",
        "uuid": "e0d7220f-5d3a-4f10-842e-3d49df714cac",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "bitwise_operations",
          "control_flow_conditionals",
          "integers",
          "text_formatting"
        ]
      },
      {
        "slug": "armstrong-numbers",
        "name": "Armstrong Numbers",
        "uuid": "059141f0-f28d-4d10-a03a-7852dbfc2d2e",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "math"
        ]
      },
      {
        "slug": "binary",
        "name": "Binary",
        "uuid": "7307e13e-7a18-4654-8df4-96951d4dccc6",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "status": "deprecated"
      },
      {
        "slug": "binary-search",
        "name": "Binary Search",
        "uuid": "fb36c27f-0ad5-42d1-90c0-6718f01e61a4",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2
      },
      {
        "slug": "bob",
        "name": "Bob",
        "uuid": "c02c7392-9478-4cfd-81eb-0cb8ebe78fe5",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "control_flow_conditionals",
          "parsing",
          "strings"
        ]
      },
      {
        "slug": "darts",
        "name": "Darts",
        "uuid": "ca189b4e-713d-4722-b21e-c07d1b975b58",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2
      },
      {
        "slug": "difference-of-squares",
        "name": "Difference of Squares",
        "uuid": "7b421b14-c33c-41a6-9e7e-4f9b6fbe6fcc",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "control_flow_loops",
          "floating_point_numbers",
          "integers",
          "math"
        ]
      },
      {
        "slug": "eliuds-eggs",
        "name": "Eliud's Eggs",
        "uuid": "9e10bc23-bd92-4b67-9921-6ff7555d3774",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2
      },
      {
        "slug": "gigasecond",
        "name": "Gigasecond",
        "uuid": "e9e27a75-143a-439f-98d0-a604724a7af2",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "date",
          "integers",
          "time",
          "transforming",
          "variables"
        ]
      },
      {
        "slug": "grains",
        "name": "Grains",
        "uuid": "d219aab6-11ec-4e0c-b041-f06c8d523946",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "integers",
          "variables"
        ]
      },
      {
        "slug": "hamming",
        "name": "Hamming",
        "uuid": "2bfb508e-7ceb-4ae1-8316-1e2daf771807",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
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          "control_flow_loops",
          "equality",
          "filtering",
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        ]
      },
      {
        "slug": "hello-world",
        "name": "Hello World",
        "uuid": "c4fdc935-885b-44bd-84e4-fae4a09e8c39",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "strings"
        ]
      },
      {
        "slug": "leap",
        "name": "Leap",
        "uuid": "84eaff19-cb25-46af-a34e-1379e692e57b",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
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          "equality",
          "integers",
          "logic"
        ]
      },
      {
        "slug": "list-ops",
        "name": "List Ops",
        "uuid": "883fdbef-ad97-4f08-8d51-d65bd91fc864",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "filtering",
          "functional_programming",
          "generics",
          "lists",
          "loops"
        ]
      },
      {
        "slug": "matching-brackets",
        "name": "Matching Brackets",
        "uuid": "c000a3e1-3488-41ba-9d4c-6f06a96bc892",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2
      },
      {
        "slug": "pangram",
        "name": "Pangram",
        "uuid": "42222c98-e8d2-41bd-9d95-2ace63864359",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
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          "strings"
        ]
      },
      {
        "slug": "perfect-numbers",
        "name": "Perfect Numbers",
        "uuid": "30971b02-79fc-40a1-aa70-ada3fec85548",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "math",
          "number_theory"
        ]
      },
      {
        "slug": "phone-number",
        "name": "Phone Number",
        "uuid": "c211045e-da97-479d-9df4-5d812573e2d0",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "interfaces",
          "parsing",
          "strings"
        ]
      },
      {
        "slug": "queen-attack",
        "name": "Queen Attack",
        "uuid": "bfa1d997-f0bd-432b-aa29-7018607d772d",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2
      },
      {
        "slug": "rna-transcription",
        "name": "RNA Transcription",
        "uuid": "7b6767b9-2efc-414d-83f7-def9c371d63d",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "control_flow_conditionals",
          "strings",
          "transforming"
        ]
      },
      {
        "slug": "raindrops",
        "name": "Raindrops",
        "uuid": "9a97c992-3da0-4f6d-b2f6-1f2683417e3b",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "control_flow_conditionals",
          "filtering",
          "integers"
        ]
      },
      {
        "slug": "resistor-color",
        "name": "Resistor Color",
        "uuid": "dfc38e27-4c5f-416a-804e-d229e94a15b5",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2
      },
      {
        "slug": "resistor-color-duo",
        "name": "Resistor Color Duo",
        "uuid": "1c55189e-2c58-48b4-92f1-9a05a9b9c6d6",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2
      },
      {
        "slug": "reverse-string",
        "name": "Reverse String",
        "uuid": "59c6319b-2799-4e4c-bef1-e28626878446",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2
      },
      {
        "slug": "roman-numerals",
        "name": "Roman Numerals",
        "uuid": "c4875bc5-e295-4782-99c7-cb3370ac8e08",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "control_flow_conditionals",
          "control_flow_loops",
          "integers",
          "strings",
          "text_formatting"
        ]
      },
      {
        "slug": "rotational-cipher",
        "name": "Rotational Cipher",
        "uuid": "4faa2bae-ecda-4c16-9f6d-148793117995",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2
      },
      {
        "slug": "scrabble-score",
        "name": "Scrabble Score",
        "uuid": "fb45c509-d83d-4f71-a8ef-f218c5426838",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "lists",
          "strings"
        ]
      },
      {
        "slug": "simple-cipher",
        "name": "Simple Cipher",
        "uuid": "c3cc6d91-b633-44d6-b7e1-04abb33e712c",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2
      },
      {
        "slug": "sublist",
        "name": "Sublist",
        "uuid": "0cabeae4-439c-4003-b532-f303c953a0aa",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "lists",
          "cond",
          "case",
          "if",
          "multiple-clause-functions",
          "pattern-matching",
          "recursion"
        ]
      },
      {
        "slug": "trinary",
        "name": "Trinary",
        "uuid": "c5239cf6-c5a3-4d81-a4d9-504c292ff11e",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "math"
        ]
      },
      {
        "slug": "two-fer",
        "name": "Two Fer",
        "uuid": "36e5dc3a-2122-484a-ae82-beb7b813e2cd",
        "practices": [],
        "prerequisites": [],
        "difficulty": 2,
        "topics": [
          "strings"
        ]
      },
      {
        "slug": "affine-cipher",
        "name": "Affine Cipher",
        "uuid": "7d966a40-3cf7-422a-99b1-c0bf05e151b2",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5
      },
      {
        "slug": "all-your-base",
        "name": "All Your Base",
        "uuid": "a101dd85-fe8b-4f3f-bece-bbd899a08ee7",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5,
        "topics": [
          "bitwise_operations",
          "control_flow_conditionals",
          "integers",
          "math"
        ]
      },
      {
        "slug": "anagram",
        "name": "Anagram",
        "uuid": "d8906a7e-9d7e-4e8e-aff0-da877291d8dc",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5,
        "topics": [
          "equality",
          "filtering",
          "strings"
        ]
      },
      {
        "slug": "atbash-cipher",
        "name": "Atbash Cipher",
        "uuid": "89125ff6-f94b-46a4-9a5d-84539674238d",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5,
        "topics": [
          "control_flow_conditionals",
          "control_flow_loops",
          "sequences",
          "transforming"
        ]
      },
      {
        "slug": "crypto-square",
        "name": "Crypto Square",
        "uuid": "884cd761-e764-4c1e-8240-bb4454b43ea9",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5,
        "topics": [
          "cryptograpy",
          "strings",
          "transforming"
        ]
      },
      {
        "slug": "etl",
        "name": "ETL",
        "uuid": "d8f4c530-02f0-44d3-b5b8-858fec4b6a9d",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5,
        "topics": [
          "control_flow_loops",
          "maps",
          "transforming"
        ]
      },
      {
        "slug": "flatten-array",
        "name": "Flatten Array",
        "uuid": "66f266a8-9c5c-4aad-8a27-92810b288a2b",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5
      },
      {
        "slug": "luhn",
        "name": "Luhn",
        "uuid": "bb10d7e4-6006-4dfd-81ae-45062a0ec999",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5,
        "topics": [
          "checksums",
          "list_operations",
          "strings"
        ]
      },
      {
        "slug": "nucleotide-count",
        "name": "Nucleotide Count",
        "uuid": "aaff28dd-718b-48d4-b507-a0b9b01bb6ad",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5,
        "topics": [
          "control_flow_loops",
          "maps",
          "sorting",
          "strings"
        ]
      },
      {
        "slug": "rail-fence-cipher",
        "name": "Rail Fence Cipher",
        "uuid": "bcd4671e-4fb9-4abb-af98-315fc83daa52",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5
      },
      {
        "slug": "robot-name",
        "name": "Robot Name",
        "uuid": "55bc8c2a-1db3-4d26-b7c6-a778b61bf46b",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5,
        "topics": [
          "randomness",
          "strings",
          "variables"
        ]
      },
      {
        "slug": "run-length-encoding",
        "name": "Run-Length Encoding",
        "uuid": "9e8f98f0-6fff-4389-a9a2-9ae43edefa21",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5
      },
      {
        "slug": "word-count",
        "name": "Word Count",
        "uuid": "1a3c64b1-8447-451f-985d-f7bd6d42bdb6",
        "practices": [],
        "prerequisites": [],
        "difficulty": 5,
        "topics": [
          "control_flow_conditionals",
          "control_flow_loops",
          "filtering",
          "strings"
        ]
      }
    ]
  },
  "key_features": [
    {
      "title": "Simple syntax",
      "content": "Emacs Lisp's syntax is simple, expressive and easy to learn.",
      "icon": "easy"
    },
    {
      "title": "S-expressions",
      "content": "Both source code and data are expressed using nested lists.",
      "icon": "homoiconic"
    },
    {
      "title": "Macros",
      "content": "It's easy to customize the language with Emacs Lisp's macro system.",
      "icon": "powerful"
    },
    {
      "title": "Multi-paradigm",
      "content": "Emacs Lisp support imperative and functional programming styles.",
      "icon": "multi-paradigm"
    },
    {
      "title": "Scripting",
      "content": "Emacs Lisp can be used as scripting language by using Emacs' batch mode.",
      "icon": "embeddable"
    },
    {
      "title": "Well Documented",
      "content": "Emacs Lisp is well documented right inside the editor.",
      "icon": "documentation"
    }
  ],
  "tags": [
    "execution_mode/interpreted",
    "paradigm/functional",
    "platform/linux",
    "platform/mac",
    "platform/windows",
    "runtime/language_specific",
    "typing/dynamic",
    "typing/strong",
    "used_for/scripts"
  ]
}