diff options
Diffstat (limited to 'pkg/commands/lpop.go')
| -rw-r--r-- | pkg/commands/lpop.go | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/pkg/commands/lpop.go b/pkg/commands/lpop.go new file mode 100644 index 0000000..d1e1ccb --- /dev/null +++ b/pkg/commands/lpop.go @@ -0,0 +1,30 @@ +package commands + +import ( + "errors" + "redisClone/pkg/core" +) + +func Lpop(args []string, getShard func(k string) *core.Shard) interface{}{ + key := args[1] + s := getShard(key) + item, exists := s.Data[key] + if !exists { + return nil + } + typedList, ok := item.Value.([]string) + if !ok { + return errors.New("WRONGTYPE Operation against a key holding the wrong kind of value") + } + if len(typedList) == 0 { + return nil + } + newItem := typedList[0] + newList := typedList[1:] + if len(newList) <= 0 { + delete(s.Data, key) + } else { + s.Data[key] = core.Item{Value: newList} + } + return newItem +}
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