replace
len(cfgData) == 0 with cfgData == ""164 if err != nil {
165 return err
166 }
167 if len(cfgData) == 0 {168 return nil
169 }
170 newCfg := &evictLeaderSchedulerConfig{}
Description
It is not recommended to use len for empty string test.
A string can be tested for its emptiness either by treating it as a slice and calculating the length of the slice, or by treating it as a string and directly comparing the value. While both produce identical code when compiled, it makes more sense to treat a string as itself, than a slice, for the sake of comparison of values.
Bad practice
len(s) == 0
Recommended
s == ""
The recommended practice is considered more idiomatic in Go.