add problem counter (#103)

.github/scripts/count-rehearsals.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# Counts the number of rehearsal files in each section
+set -euo pipefail
+
+SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
+# shellcheck source=.github/scripts/sections.sh
+source "${SCRIPT_DIR}/sections.sh"
+
+ALL_TESTS=0
+# shellcheck disable=SC2154
+for section in "${sections[@]}"; do
+   SECTION_TESTS=$(find "${section}" -name "*_test.go" | wc -l)
+   ALL_TESTS=$((ALL_TESTS + SECTION_TESTS))
+done
+echo $ALL_TESTS

.github/scripts/export-md.sh

@@ -1,26 +1,16 @@
 #!/usr/bin/env bash
+# Exports the markdown files from the docs site
 set -euo pipefail
 
-# This script is used to export the markdown files from the docs site
+SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
+# shellcheck source=./.github/scripts/sections.sh
+source "${SCRIPT_DIR}/sections.sh"
+
 declare -a files=(
   README.md
   complexity.md
-  ./array/README.md
-  ./strings/README.md
-  ./linkedlist/README.md
-  ./stack/README.md
-  ./queue/README.md
-  ./hashtable/README.md
-  ./tree/README.md
-  ./heap/README.md
-  ./recursion/README.md
-  ./dnc//README.md
-  ./bit//README.md
-  ./backtracking/README.md
-  ./graph/README.md
-  ./greedy/README.md
-  ./dp/README.md
 )
+files+=("${sections[@]/%//README.md}")
 
 for file in "${files[@]}"; do
    cat "$file"

.github/scripts/sections.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+declare -a sections=(
+  ./array
+  ./strings
+  ./linkedlist
+  ./stack
+  ./queue
+  ./hashtable
+  ./tree
+  ./heap
+  ./recursion
+  ./dnc
+  ./bit
+  ./backtracking
+  ./graph
+  ./greedy
+  ./dp
+)
+
+export sections

.github/workflows/tests.yaml

@@ -11,6 +11,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+      - uses: reviewdog/action-misspell@v1
+        with:
+          github_token: ${{ secrets.github_token }}
+          locale: "US"
       - uses: github/super-linter@v4
         env:
           DEFAULT_BRANCH: main
@@ -22,10 +26,7 @@ jobs:
           YAML_CONFIG_FILE: .yamllint.yml
           VALIDATE_GITLEAKS: false
           LOG_LEVEL: WARN
-      - uses: reviewdog/action-misspell@v1
-        with:
-          github_token: ${{ secrets.github_token }}
-          locale: "US"
+          VALIDATE_SHELL_SHFMT: false
   tests:
     runs-on: ubuntu-latest
     steps:
@@ -37,7 +38,7 @@ jobs:
             ~/.cache/go-build
             ~/go/pkg/
             ~/go/bin/
-          key: go-cache-${{ hashFiles('go.sum') }}
+          key: go-cache-${{ hashFiles('go.mod') }}
       - run: go test -v -coverprofile=profile.cov ./...
       - uses: shogo82148/actions-goveralls@v1
         with:

greedy/task_scheduling.go

@@ -2,13 +2,14 @@ package greedy
 
 import "sort"
 
+// Event represents an event to be scheduled.
 type Event struct {
 	Name      string
 	StartTime int
 	EndTime   int
 }
 
-// Solves the problem in O(n*Log n) time and O(1) space.
+// ScheduleEvents Solves the problem in O(n*Log n) time and O(1) space.
 func ScheduleEvents(events []Event) []Event {
 	sort.Slice(events, func(i, j int) bool {
 		return events[i].EndTime < events[j].EndTime

heap/heap_sort.go

@@ -31,7 +31,7 @@ func HeapSort(list []int) []int {
 	return sorted
 }
 
-// Returns a new Min Heap.
+// NewMinHeap Returns a new Min Heap.
 func NewMinHeap() *MinHeap {
 	return &MinHeap{
 		Data: []*Vertex{},

queue/queue_using_circular_array.go

@@ -12,6 +12,7 @@ type UsingCircularArray struct {
 
 const emptyValue = 0
 
+// ErrQueueAtMaxCapacity occurs when the queue is at max capacity.
 var ErrQueueAtMaxCapacity = errors.New("queue is at max capacity")
 
 // NewCircularQueue returns a fixed size circular queue.

stack/basic_calculator.go

@@ -8,6 +8,7 @@ type evaluation struct {
 	stack []float64
 }
 
+// ErrImbalancedParentheses occurs when the expression has imbalanced parentheses.
 var ErrImbalancedParentheses = errors.New("expression has imbalanced parentheses")
 
 // BasicCalculator solves the problem in O(n) time and O(n) space.

strings/reverse_vowels.go

@@ -11,6 +11,7 @@ var (
 		`i`: true,
 		`u`: true,
 	}
+	// ErrPopStack is returned when the stack is empty.
 	ErrPopStack = errors.New("can not Pop on an empty stack")
 )