ci: add ruby style check

Author: nguyenhuuit

.github/workflows/ruby-style.yml

@@ -0,0 +1,29 @@
+name: Ruby Style Check
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+     - '**/*.rb'
+
+jobs:
+  style:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.4'
+          bundler-cache: true
+      
+      - name: Install RuboCop and extensions
+        run: |
+          gem install rubocop
+          gem install rubocop-rake
+          gem install rubocop-rspec
+      
+      - name: Run RuboCop
+        continue-on-error: true
+        run: rubocop 

.rubocop.yml

@@ -0,0 +1,29 @@
+require:
+  - rubocop-rake
+  - rubocop-rspec
+
+AllCops:
+  NewCops: enable
+  TargetRubyVersion: 3.4
+
+Style/Documentation:
+  Enabled: false
+
+Layout/LineLength:
+  Max: 120
+
+Style/StringLiterals:
+  EnforcedStyle: single_quotes
+
+Style/FrozenStringLiteralComment:
+  Enabled: true
+  EnforcedStyle: always
+
+Style/For:
+  Enabled: false
+
+Metrics/MethodLength:
+  Max: 20
+
+Metrics/AbcSize:
+  Max: 25

2024/day1/part1.rb

@@ -1,14 +1,12 @@
+# frozen_string_literal: true
+
 def functional_style(input)
-  lefts, rights = input.split("\n").map {
-    |line| line.split('   ').map(&:to_i)
-  }.transpose
+  lefts, rights = input.split("\n").map { |line| line.split('   ').map(&:to_i) }.transpose
 
   sorted_lefts = lefts.sort
   sorted_rights = rights.sort
 
-  distance = sorted_lefts.zip(sorted_rights).sum { |left, right| (left - right).abs }
-
-  return distance
+  sorted_lefts.zip(sorted_rights).sum { |left, right| (left - right).abs }
 end
 
 def imperative_style(input)
@@ -18,7 +16,7 @@ def imperative_style(input)
   rights = []
 
   for line in lines
-    left, right = line.split("   ")
+    left, right = line.split('   ')
     lefts << left.to_i
     rights << right.to_i
   end
@@ -30,13 +28,15 @@ def imperative_style(input)
   for i in 0..(lefts.length - 1)
     distance += (sorted_lefts[i] - sorted_rights[i]).abs
   end
-  return distance
+
+  distance
 end
 
 def solution(input)
   functional_result = functional_style(input)
   imperative_result = imperative_style(input)
   puts "Functional result: #{functional_result}"
   puts "Imparative result: #{imperative_result}"
-  return functional_result
-end
+
+  functional_result
+end

2024/day1/part2.rb

@@ -1,11 +1,10 @@
+# frozen_string_literal: true
+
 def functional_style(input)
   lefts, rights = input.split("\n").map { |line| line.split('   ') }.transpose
 
   counts = rights.tally
-
-  similarity = lefts.sum { |left| counts[left].to_i * left.to_i }
-
-  return similarity
+  lefts.sum { |left| counts[left].to_i * left.to_i }
 end
 
 def imperative_style(input)
@@ -15,7 +14,7 @@ def imperative_style(input)
   rights = Hash.new(0)
 
   for line in lines
-    left, right = line.split("   ")
+    left, right = line.split('   ')
     lefts << left
     rights[right] += 1
   end
@@ -25,13 +24,14 @@ def imperative_style(input)
     similarity += left.to_i * rights[left]
   end
 
-  return similarity
+  similarity
 end
 
 def solution(input)
   functional_result = functional_style(input)
   imperative_result = imperative_style(input)
   puts "Functional result: #{functional_result}"
   puts "Imparative result: #{imperative_result}"
-  return functional_result
-end
+
+  functional_result
+end