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271-Encode-And-Decode-Strings.go
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/
271-Encode-And-Decode-Strings.go
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import (
"strings"
"strconv"
)
type Codec struct {
b strings.Builder
}
// Encodes a list of strings to a single string.
func (codec *Codec) Encode(strs []string) string {
defer codec.b.Reset()
for _, word := range strs {
codec.b.WriteString(strconv.Itoa(len(word)))
codec.b.WriteRune('|')
codec.b.WriteString(word)
}
return codec.b.String()
}
// Decodes a single string to a list of strings.
func (codec *Codec) Decode(strs string) []string {
var words []string
for i := 0; i < len(strs); {
lenStart := i
lenEnd := i
for strs[lenEnd] != '|' {
lenEnd++
}
var l int
dec := 1
for j := lenEnd - 1; j >= lenStart; j-- {
l += (int(strs[j]) - 48) * dec
dec *= 10
}
start := lenEnd + 1
end := start + l
words = append(words, string(strs[start:end]))
i = end
}
return words
}
// Your Codec object will be instantiated and called as such:
// var codec Codec
// codec.Decode(codec.Encode(strs));