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Fix prefix scan example 

The example is correct in isolation, but if people just copy the loop, it will go into infinite loop when given an empty byte slice.
pull/3/head
Bjørn Erik Pedersen 2016-12-06 21:38:41 +01:00 committed by GitHub
parent 0d9f544bb9
commit 714f31f39e
1 changed files with 1 additions and 1 deletions
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README.md
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@ -395,7 +395,7 @@ db.View(func(tx *bolt.Tx) error {
c := tx.Bucket([]byte("MyBucket")).Cursor()
prefix := []byte("1234")
for k, v := c.Seek(prefix); bytes.HasPrefix(k, prefix); k, v = c.Next() {
for k, v := c.Seek(prefix); k != nil && bytes.HasPrefix(k, prefix); k, v = c.Next() {
fmt.Printf("key=%s, value=%s\n", k, v)
}