diff --git a/config.json b/config.json index 911f9405..6a7272c2 100644 --- a/config.json +++ b/config.json @@ -977,6 +977,14 @@ "practices": [], "prerequisites": [], "difficulty": 3 + }, + { + "slug": "wordy", + "name": "Wordy", + "uuid": "1f6ffc9c-5996-4269-a9b8-cb4914e222dd", + "practices": [], + "prerequisites": [], + "difficulty": 3 } ] }, diff --git a/exercises/practice/wordy/.docs/instructions.md b/exercises/practice/wordy/.docs/instructions.md new file mode 100644 index 00000000..aafb9ee5 --- /dev/null +++ b/exercises/practice/wordy/.docs/instructions.md @@ -0,0 +1,59 @@ +# Instructions + +Parse and evaluate simple math word problems returning the answer as an integer. + +## Iteration 0 — Numbers + +Problems with no operations simply evaluate to the number given. + +> What is 5? + +Evaluates to 5. + +## Iteration 1 — Addition + +Add two numbers together. + +> What is 5 plus 13? + +Evaluates to 18. + +Handle large numbers and negative numbers. + +## Iteration 2 — Subtraction, Multiplication and Division + +Now, perform the other three operations. + +> What is 7 minus 5? + +2 + +> What is 6 multiplied by 4? + +24 + +> What is 25 divided by 5? + +5 + +## Iteration 3 — Multiple Operations + +Handle a set of operations, in sequence. + +Since these are verbal word problems, evaluate the expression from left-to-right, _ignoring the typical order of operations._ + +> What is 5 plus 13 plus 6? + +24 + +> What is 3 plus 2 multiplied by 3? + +15 (i.e. not 9) + +## Iteration 4 — Errors + +The parser should reject: + +- Unsupported operations ("What is 52 cubed?") +- Non-math questions ("Who is the President of the United States") +- Word problems with invalid syntax ("What is 1 plus plus 2?") diff --git a/exercises/practice/wordy/.meta/config.json b/exercises/practice/wordy/.meta/config.json new file mode 100644 index 00000000..ffd58505 --- /dev/null +++ b/exercises/practice/wordy/.meta/config.json @@ -0,0 +1,17 @@ +{ + "authors": [], + "files": { + "solution": [ + "wordy.jl" + ], + "test": [ + "runtests.jl" + ], + "example": [ + ".meta/example.jl" + ] + }, + "blurb": "Parse and evaluate simple math word problems returning the answer as an integer.", + "source": "Inspired by one of the generated questions in the Extreme Startup game.", + "source_url": "https://github.com/rchatley/extreme_startup" +} diff --git a/exercises/practice/wordy/.meta/example.jl b/exercises/practice/wordy/.meta/example.jl new file mode 100644 index 00000000..be2efc19 --- /dev/null +++ b/exercises/practice/wordy/.meta/example.jl @@ -0,0 +1,14 @@ +MATHEXPRESSION = r"-?\d+\.?\d* [-+*/] -?\d+\.?\d*" #Regex which, for x,y ∈ R and op ∈ {+,-,/,*}, matches: "x op y" +NUMBER = r"^-?\d+\.?\d*$" #Regex which matches a string consisting solely of a single n ∈ R +ENG2MATH = zip(("plus","minus","divided by","multiplied by","What is ","?"), ("+","-","/","*","","")) + +function evalwordy(eq) + expr = match(MATHEXPRESSION, eq) + isnothing(expr) ? match(NUMBER, eq) : evalwordy(replace(eq, expr.match => (Base.eval ∘ Meta.parse)(expr.match), count=1)) +end + +function wordy(problem) + foreach(op -> problem = replace(problem, first(op) => last(op)), ENG2MATH) + answer = evalwordy(problem) + isnothing(answer) ? throw(ArgumentError(problem)) : Meta.parse(answer.match) +end diff --git a/exercises/practice/wordy/.meta/tests.toml b/exercises/practice/wordy/.meta/tests.toml new file mode 100644 index 00000000..f812dfa9 --- /dev/null +++ b/exercises/practice/wordy/.meta/tests.toml @@ -0,0 +1,79 @@ +# 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. + +[88bf4b28-0de3-4883-93c7-db1b14aa806e] +description = "just a number" + +[bb8c655c-cf42-4dfc-90e0-152fcfd8d4e0] +description = "addition" + +[79e49e06-c5ae-40aa-a352-7a3a01f70015] +description = "more addition" + +[b345dbe0-f733-44e1-863c-5ae3568f3803] +description = "addition with negative numbers" + +[cd070f39-c4cc-45c4-97fb-1be5e5846f87] +description = "large addition" + +[0d86474a-cd93-4649-a4fa-f6109a011191] +description = "subtraction" + +[30bc8395-5500-4712-a0cf-1d788a529be5] +description = "multiplication" + +[34c36b08-8605-4217-bb57-9a01472c427f] +description = "division" + +[da6d2ce4-fb94-4d26-8f5f-b078adad0596] +description = "multiple additions" + +[7fd74c50-9911-4597-be09-8de7f2fea2bb] +description = "addition and subtraction" + +[b120ffd5-bad6-4e22-81c8-5512e8faf905] +description = "multiple subtraction" + +[4f4a5749-ef0c-4f60-841f-abcfaf05d2ae] +description = "subtraction then addition" + +[312d908c-f68f-42c9-aa75-961623cc033f] +description = "multiple multiplication" + +[38e33587-8940-4cc1-bc28-bfd7e3966276] +description = "addition and multiplication" + +[3c854f97-9311-46e8-b574-92b60d17d394] +description = "multiple division" + +[3ad3e433-8af7-41ec-aa9b-97b42ab49357] +description = "unknown operation" + +[8a7e85a8-9e7b-4d46-868f-6d759f4648f8] +description = "Non math question" + +[42d78b5f-dbd7-4cdb-8b30-00f794bb24cf] +description = "reject problem missing an operand" + +[c2c3cbfc-1a72-42f2-b597-246e617e66f5] +description = "reject problem with no operands or operators" + +[4b3df66d-6ed5-4c95-a0a1-d38891fbdab6] +description = "reject two operations in a row" + +[6abd7a50-75b4-4665-aa33-2030fd08bab1] +description = "reject two numbers in a row" + +[10a56c22-e0aa-405f-b1d2-c642d9c4c9de] +description = "reject postfix notation" + +[0035bc63-ac43-4bb5-ad6d-e8651b7d954e] +description = "reject prefix notation" diff --git a/exercises/practice/wordy/runtests.jl b/exercises/practice/wordy/runtests.jl new file mode 100644 index 00000000..86b24118 --- /dev/null +++ b/exercises/practice/wordy/runtests.jl @@ -0,0 +1,97 @@ +using Test + +include("wordy.jl") + +@testset verbose = true "tests" begin + @testset "just a number" begin + @test wordy("What is 5?") == 5 + end + + @testset "addition" begin + @test wordy("What is 1 plus 1?") == 2 + end + + @testset "more addition" begin + @test wordy("What is 53 plus 2?") == 55 + end + + @testset "addition with negative numbers" begin + @test wordy("What is -1 plus -10?") == -11 + end + + @testset "large addition" begin + @test wordy("What is 123 plus 45678?") == 45801 + end + + @testset "subtraction" begin + @test wordy("What is 4 minus -12?") == 16 + end + + @testset "multiplication" begin + @test wordy("What is -3 multiplied by 25?") == -75 + end + + @testset "division" begin + @test wordy("What is 33 divided by -3?") == -11 + end + + @testset "multiple additions" begin + @test wordy("What is 1 plus 1 plus 1?") == 3 + end + + @testset "addition and subtraction" begin + @test wordy("What is 1 plus 5 minus -2?") == 8 + end + + @testset "multiple subtraction" begin + @test wordy("What is 20 minus 4 minus 13?") == 3 + end + + @testset "subtraction then addition" begin + @test wordy("What is 17 minus 6 plus 3?") == 14 + end + + @testset "multiple multiplication" begin + @test wordy("What is 2 multiplied by -2 multiplied by 3?") == -12 + end + + @testset "addition and multiplication" begin + @test wordy("What is -3 plus 7 multiplied by -2?") == -8 + end + + @testset "multiple division" begin + @test wordy("What is -12 divided by 2 divided by -3?") == 2 + end + + @testset "unknown operation" begin + @test_throws ArgumentError wordy("What is 52 cubed?") + end + + @testset "Non math question" begin + @test_throws ArgumentError wordy("Who is the President of the United States?") + end + + @testset "reject problem missing an operand" begin + @test_throws ArgumentError wordy("What is 1 plus?") + end + + @testset "reject problem with no operands or operators" begin + @test_throws ArgumentError wordy("What is?") + end + + @testset "reject two operations in a row" begin + @test_throws ArgumentError wordy("What is 1 plus plus 2?") + end + + @testset "reject two numbers in a row" begin + @test_throws ArgumentError wordy("What is 1 plus 2 1?") + end + + @testset "reject postfix notation" begin + @test_throws ArgumentError wordy("What is 1 2 plus?") + end + + @testset "reject prefix notation" begin + @test_throws ArgumentError wordy("What is plus 1 2?") + end +end diff --git a/exercises/practice/wordy/wordy.jl b/exercises/practice/wordy/wordy.jl new file mode 100644 index 00000000..43f052f8 --- /dev/null +++ b/exercises/practice/wordy/wordy.jl @@ -0,0 +1,3 @@ +function wordy(problem) + # your code here +end