在golang原本都利用bytes.Buffer與+來做字串串接， 發現有strings.Builder這個東西，紀錄一下測試結果
2019-01-06
2019-01-03
golang: 轉型成interface時顯示錯誤typeA does not implement interfaceA(Call method has pointer receiver)
constructor回傳value而非pointer時，轉型成interface時顯示錯誤typeA does not implement interfaceA(Call method has pointer receiver)
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