From 0790df9fd00ba7ab2f7b6dcc3b9d422a02383986 Mon Sep 17 00:00:00 2001
From: Emir Pasic <emirpasic@hotmail.com>
Date: Sun, 7 Aug 2016 01:54:22 +0200
Subject: [PATCH] - errcheck

---
 README.md            | 3 ++-
 trees/btree/btree.go | 9 ++++++---
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 0ebd8eb..8e4a1b2 100644
--- a/README.md
+++ b/README.md
@@ -1237,10 +1237,11 @@ Coding style:
 # Install tooling and set path:
 go get github.com/golang/lint/golint
 go get github.com/fzipp/gocyclo
+go get github.com/kisielk/errcheck
 export PATH=$PATH:$GOPATH/bin
 
 # Fix errors and warnings:
-go fmt ./... && gofmt -s -w . && go vet ./... && go get ./... && go test ./... && golint ./... && gocyclo -avg -over 15 .
+go fmt ./... && gofmt -s -w . && go vet ./... && go get ./... && go test ./... && golint ./... && gocyclo -avg -over 15 . && errcheck ./...
 ```
 
 ### License
diff --git a/trees/btree/btree.go b/trees/btree/btree.go
index 549684f..5f86699 100644
--- a/trees/btree/btree.go
+++ b/trees/btree/btree.go
@@ -191,7 +191,8 @@ func (tree *Tree) RightValue() interface{} {
 // String returns a string representation of container (for debugging purposes)
 func (tree *Tree) String() string {
 	var buffer bytes.Buffer
-	buffer.WriteString("BTree\n")
+	if _, err := buffer.WriteString("BTree\n"); err != nil {
+	}
 	if !tree.Empty() {
 		tree.output(&buffer, tree.Root, 0, true)
 	}
@@ -208,8 +209,10 @@ func (tree *Tree) output(buffer *bytes.Buffer, node *Node, level int, isTail boo
 			tree.output(buffer, node.Children[e], level+1, true)
 		}
 		if e < len(node.Entries) {
-			buffer.WriteString(strings.Repeat("    ", level))
-			buffer.WriteString(fmt.Sprintf("%v", node.Entries[e].Key) + "\n")
+			if _, err := buffer.WriteString(strings.Repeat("    ", level)); err != nil {
+			}
+			if _, err := buffer.WriteString(fmt.Sprintf("%v", node.Entries[e].Key) + "\n"); err != nil {
+			}
 		}
 	}
 }