diff --git a/config.json b/config.json index d7aa05c..6706ac5 100644 --- a/config.json +++ b/config.json @@ -438,6 +438,14 @@ "practices": [], "prerequisites": [], "difficulty": 4 + }, + { + "slug": "matching-brackets", + "name": "Matching Brackets", + "uuid": "34ca14e4-31a6-4da6-a5ce-44da523bfb12", + "practices": [], + "prerequisites": [], + "difficulty": 5 } ] }, diff --git a/exercises/practice/matching-brackets/.busted b/exercises/practice/matching-brackets/.busted new file mode 100644 index 0000000..86b84e7 --- /dev/null +++ b/exercises/practice/matching-brackets/.busted @@ -0,0 +1,5 @@ +return { + default = { + ROOT = { '.' } + } +} diff --git a/exercises/practice/matching-brackets/.docs/instructions.md b/exercises/practice/matching-brackets/.docs/instructions.md new file mode 100644 index 0000000..ea17084 --- /dev/null +++ b/exercises/practice/matching-brackets/.docs/instructions.md @@ -0,0 +1,5 @@ +# Instructions + +Given a string containing brackets `[]`, braces `{}`, parentheses `()`, or any combination thereof, verify that any and all pairs are matched and nested correctly. +Any other characters should be ignored. +For example, `"{what is (42)}?"` is balanced and `"[text}"` is not. diff --git a/exercises/practice/matching-brackets/.docs/introduction.md b/exercises/practice/matching-brackets/.docs/introduction.md new file mode 100644 index 0000000..0618221 --- /dev/null +++ b/exercises/practice/matching-brackets/.docs/introduction.md @@ -0,0 +1,8 @@ +# Introduction + +You're given the opportunity to write software for the Bracketeer™, an ancient but powerful mainframe. +The software that runs on it is written in a proprietary language. +Much of its syntax is familiar, but you notice _lots_ of brackets, braces and parentheses. +Despite the Bracketeer™ being powerful, it lacks flexibility. +If the source code has any unbalanced brackets, braces or parentheses, the Bracketeer™ crashes and must be rebooted. +To avoid such a scenario, you start writing code that can verify that brackets, braces, and parentheses are balanced before attempting to run it on the Bracketeer™. diff --git a/exercises/practice/matching-brackets/.meta/config.json b/exercises/practice/matching-brackets/.meta/config.json new file mode 100644 index 0000000..321c479 --- /dev/null +++ b/exercises/practice/matching-brackets/.meta/config.json @@ -0,0 +1,18 @@ +{ + "authors": [ + "glennj" + ], + "files": { + "solution": [ + "matching_brackets.moon" + ], + "test": [ + "matching_brackets_spec.moon" + ], + "example": [ + ".meta/example.moon" + ] + }, + "blurb": "Make sure the brackets and braces all match.", + "source": "Ginna Baker" +} diff --git a/exercises/practice/matching-brackets/.meta/example.moon b/exercises/practice/matching-brackets/.meta/example.moon new file mode 100644 index 0000000..23aa3f0 --- /dev/null +++ b/exercises/practice/matching-brackets/.meta/example.moon @@ -0,0 +1,18 @@ +push = table.insert +pop = table.remove +is_empty = (s) -> #s == 0 + +opener = { [']']: '[', ['}']: '{', [')']: '(' } + + +{ + is_paired: (input) -> + stack = {} + + for char in input\gmatch '.' + switch char + when '[', '{', '(' then push stack, char + when ']', '}', ')' then return false if opener[char] != pop stack + + is_empty stack +} diff --git a/exercises/practice/matching-brackets/.meta/spec_generator.moon b/exercises/practice/matching-brackets/.meta/spec_generator.moon new file mode 100644 index 0000000..46052d3 --- /dev/null +++ b/exercises/practice/matching-brackets/.meta/spec_generator.moon @@ -0,0 +1,5 @@ +{ + module_imports: {'is_paired'}, + generate_test: (case, level) -> + indent "assert.is_#{case.expected} is_paired #{quote case.input.value\gsub('\\', '\\\\')}", level +} diff --git a/exercises/practice/matching-brackets/.meta/tests.toml b/exercises/practice/matching-brackets/.meta/tests.toml new file mode 100644 index 0000000..35a98a0 --- /dev/null +++ b/exercises/practice/matching-brackets/.meta/tests.toml @@ -0,0 +1,70 @@ +# This is an auto-generated file. +# +# Regenerating this file via `configlet sync` will: +# - Recreate every `description` key/value pair +# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications +# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion) +# - Preserve any other key/value pair +# +# As user-added comments (using the # character) will be removed when this file +# is regenerated, comments can be added via a `comment` key. + +[81ec11da-38dd-442a-bcf9-3de7754609a5] +description = "paired square brackets" + +[287f0167-ac60-4b64-8452-a0aa8f4e5238] +description = "empty string" + +[6c3615a3-df01-4130-a731-8ef5f5d78dac] +description = "unpaired brackets" + +[9d414171-9b98-4cac-a4e5-941039a97a77] +description = "wrong ordered brackets" + +[f0f97c94-a149-4736-bc61-f2c5148ffb85] +description = "wrong closing bracket" + +[754468e0-4696-4582-a30e-534d47d69756] +description = "paired with whitespace" + +[ba84f6ee-8164-434a-9c3e-b02c7f8e8545] +description = "partially paired brackets" + +[3c86c897-5ff3-4a2b-ad9b-47ac3a30651d] +description = "simple nested brackets" + +[2d137f2c-a19e-4993-9830-83967a2d4726] +description = "several paired brackets" + +[2e1f7b56-c137-4c92-9781-958638885a44] +description = "paired and nested brackets" + +[84f6233b-e0f7-4077-8966-8085d295c19b] +description = "unopened closing brackets" + +[9b18c67d-7595-4982-b2c5-4cb949745d49] +description = "unpaired and nested brackets" + +[a0205e34-c2ac-49e6-a88a-899508d7d68e] +description = "paired and wrong nested brackets" + +[1d5c093f-fc84-41fb-8c2a-e052f9581602] +description = "paired and wrong nested brackets but innermost are correct" + +[ef47c21b-bcfd-4998-844c-7ad5daad90a8] +description = "paired and incomplete brackets" + +[a4675a40-a8be-4fc2-bc47-2a282ce6edbe] +description = "too many closing brackets" + +[a345a753-d889-4b7e-99ae-34ac85910d1a] +description = "early unexpected brackets" + +[21f81d61-1608-465a-b850-baa44c5def83] +description = "early mismatched brackets" + +[99255f93-261b-4435-a352-02bdecc9bdf2] +description = "math expression" + +[8e357d79-f302-469a-8515-2561877256a1] +description = "complex latex expression" diff --git a/exercises/practice/matching-brackets/matching_brackets.moon b/exercises/practice/matching-brackets/matching_brackets.moon new file mode 100644 index 0000000..3bdb9cc --- /dev/null +++ b/exercises/practice/matching-brackets/matching_brackets.moon @@ -0,0 +1,4 @@ +{ + is_paired: (input) -> + error 'Implement me' +} diff --git a/exercises/practice/matching-brackets/matching_brackets_spec.moon b/exercises/practice/matching-brackets/matching_brackets_spec.moon new file mode 100644 index 0000000..840fec4 --- /dev/null +++ b/exercises/practice/matching-brackets/matching_brackets_spec.moon @@ -0,0 +1,62 @@ +import is_paired from require 'matching_brackets' + +describe 'matching-brackets', -> + it 'paired square brackets', -> + assert.is_true is_paired '[]' + + pending 'empty string', -> + assert.is_true is_paired '' + + pending 'unpaired brackets', -> + assert.is_false is_paired '[[' + + pending 'wrong ordered brackets', -> + assert.is_false is_paired '}{' + + pending 'wrong closing bracket', -> + assert.is_false is_paired '{]' + + pending 'paired with whitespace', -> + assert.is_true is_paired '{ }' + + pending 'partially paired brackets', -> + assert.is_false is_paired '{[])' + + pending 'simple nested brackets', -> + assert.is_true is_paired '{[]}' + + pending 'several paired brackets', -> + assert.is_true is_paired '{}[]' + + pending 'paired and nested brackets', -> + assert.is_true is_paired '([{}({}[])])' + + pending 'unopened closing brackets', -> + assert.is_false is_paired '{[)][]}' + + pending 'unpaired and nested brackets', -> + assert.is_false is_paired '([{])' + + pending 'paired and wrong nested brackets', -> + assert.is_false is_paired '[({]})' + + pending 'paired and wrong nested brackets but innermost are correct', -> + assert.is_false is_paired '[({}])' + + pending 'paired and incomplete brackets', -> + assert.is_false is_paired '{}[' + + pending 'too many closing brackets', -> + assert.is_false is_paired '[]]' + + pending 'early unexpected brackets', -> + assert.is_false is_paired ')()' + + pending 'early mismatched brackets', -> + assert.is_false is_paired '{)()' + + pending 'math expression', -> + assert.is_true is_paired '(((185 + 223.85) * 15) - 543)/2' + + pending 'complex latex expression', -> + assert.is_true is_paired '\\left(\\begin{array}{cc} \\frac{1}{3} & x\\\\ \\mathrm{e}^{x} &... x^2 \\end{array}\\right)'