fix: coding style and file format for chapter 11, 12, 13, 14 and 15.

eBook/exercises/chapter_11/stack/stack_general.go

@@ -1,39 +1,39 @@
-// stack.go
-package stack
-
-import "errors"
-
-type Stack []interface{}
-
-func (stack Stack) Len() int {
-	return len(stack)
-}
-
-func (stack Stack) Cap() int {
-	return cap(stack)
-}
-
-func (stack Stack) IsEmpty() bool {
-	return len(stack) == 0
-}
-
-func (stack *Stack) Push(e interface{}) {
-	*stack = append(*stack, e)
-}
-
-func (stack Stack) Top() (interface{}, error) {
-	if len(stack) == 0 {
-		return nil, errors.New("stack is empty")
-	}
-	return stack[len(stack)-1], nil
-}
-
-func (stack *Stack) Pop() (interface{}, error) {
-	stk := *stack	// dereference to a local variable stk
-	if len(stk) == 0 {
-		return nil, errors.New("stack is empty")
-	}
-	top := stk[len(stk)-1]
-	*stack = stk[:len(stk)-1] // shrink the stack
-	return top, nil
-}
+// stack.go
+package stack
+
+import "errors"
+
+type Stack []interface{}
+
+func (stack Stack) Len() int {
+	return len(stack)
+}
+
+func (stack Stack) Cap() int {
+	return cap(stack)
+}
+
+func (stack Stack) IsEmpty() bool {
+	return len(stack) == 0
+}
+
+func (stack *Stack) Push(e interface{}) {
+	*stack = append(*stack, e)
+}
+
+func (stack Stack) Top() (interface{}, error) {
+	if len(stack) == 0 {
+		return nil, errors.New("stack is empty")
+	}
+	return stack[len(stack)-1], nil
+}
+
+func (stack *Stack) Pop() (interface{}, error) {
+	stk := *stack // dereference to a local variable stk
+	if len(stk) == 0 {
+		return nil, errors.New("stack is empty")
+	}
+	top := stk[len(stk)-1]
+	*stack = stk[:len(stk)-1] // shrink the stack
+	return top, nil
+}