4 files changed, 27 insertions, 27 deletions
diff --git a/ds/arraylist.go b/ds/arraylist.go
index 243efe1..d3feef5 100644
--- a/ds/arraylist.go
+++ b/ds/arraylist.go
@@ -5,7 +5,7 @@ import (
 	"strings"
 )
 
-type ArrayList []Comparer
+type ArrayList []Elem
 
 func (a ArrayList) FirstN(n int) string {
 	var sb strings.Builder
@@ -37,7 +37,7 @@ func (a ArrayList) Sorted() bool {
 }
 
 func (a ArrayList) Swap(i, j int) {
-    tmp := a[i]
-    a[i] = a[j]
-    a[j] = tmp
+	tmp := a[i]
+	a[i] = a[j]
+	a[j] = tmp
 }
diff --git a/ds/comparer.go b/ds/comparer.go
deleted file mode 100644
index 8fb3727..0000000
--- a/ds/comparer.go
+++ /dev/null
@@ -1,10 +0,0 @@
-package ds
-
-type Comparer interface {
-	Equal(a Comparer) bool
-	Lower(a Comparer) bool
-	LowerEqual(a Comparer) bool
-	Higher(a Comparer) bool
-	HigherEqual(a Comparer) bool
-	Int() int
-}
diff --git a/ds/elem.go b/ds/elem.go
new file mode 100644
index 0000000..0589e81
--- /dev/null
+++ b/ds/elem.go
@@ -0,0 +1,10 @@
+package ds
+
+type Elem interface {
+	Equal(a Elem) bool
+	Lower(a Elem) bool
+	LowerEqual(a Elem) bool
+	Higher(a Elem) bool
+	HigherEqual(a Elem) bool
+	Int() int
+}
diff --git a/ds/integer.go b/ds/integer.go
index 04fee3e..4abb349 100644
--- a/ds/integer.go
+++ b/ds/integer.go
@@ -6,7 +6,7 @@ import (
 )
 
 type Integer struct {
-	val int
+	Val int
 }
 
 func RandomIntegers(length, max int) ArrayList {
@@ -36,29 +36,29 @@ func ReverseSortedIntegers(length int) ArrayList {
 }
 
 func (i Integer) String() string {
-	return fmt.Sprintf("%d", i.val)
+	return fmt.Sprintf("%d", i.Val)
 }
 
 func (i Integer) Int() int {
-	return i.val
+	return i.Val
 }
 
-func (i Integer) Equal(j Comparer) bool {
-	return i.val == j.Int()
+func (i Integer) Equal(j Elem) bool {
+	return i.Val == j.Int()
 }
 
-func (i Integer) Lower(j Comparer) bool {
-	return i.val < j.Int()
+func (i Integer) Lower(j Elem) bool {
+	return i.Val < j.Int()
 }
 
-func (i Integer) LowerEqual(j Comparer) bool {
-	return i.val <= j.Int()
+func (i Integer) LowerEqual(j Elem) bool {
+	return i.Val <= j.Int()
 }
 
-func (i Integer) Higher(j Comparer) bool {
-	return i.val > j.Int()
+func (i Integer) Higher(j Elem) bool {
+	return i.Val > j.Int()
 }
 
-func (i Integer) HigherEqual(j Comparer) bool {
-	return i.val >= j.Int()
+func (i Integer) HigherEqual(j Elem) bool {
+	return i.Val >= j.Int()
 }