開発環境
- macOS Mojave - Apple (OS)
- Emacs (Text Editor)
- Windows 10 Pro (OS)
- Visual Studio Code (Text Editor)
- Go (プログラミング言語)
プログラミング言語Go (ADDISON-WESLEY PROFESSIONAL COMPUTING SERIES) (Alan A.A. Donovan(著)、Brian W. Kernighan(著)、柴田 芳樹(翻訳)、丸善出版)の第4章(コンポジット型)、4.5(JSON)、練習問題4.10の解答を求めてみる。
コード
package main import ( "fmt" "log" "os" "time" "gopl.io/ch4/github" ) func main() { // 日本語のコメント result, err := github.SearchIssues(os.Args[1:]) if err != nil { log.Fatal(err) } term1 := []string{} term2 := []string{} term3 := []string{} now := time.Now().Unix() for _, item := range result.Items { t := item.CreatedAt y, m, d := t.Date() s := fmt.Sprintf("#%-5d %9.9s %.55s(%04d-%02d-%02d)\n", item.Number, item.User.Login, item.Title, y, m, d) if t.AddDate(0, 1, 0).Unix() > now { term1 = append(term1, s) } else if t.AddDate(1, 0, 0).Unix() > now { term2 = append(term2, s) } else { term3 = append(term3, s) } } desc := []string{"一ヶ月未満", "一年未満", "一年以上"} terms := [][]string{term1, term2, term3} for i, d := range desc { fmt.Println(d) for _, s := range terms[i] { fmt.Print(s) } } }
入出力結果(cmd(コマンドプロンプト)、Terminal)
C:\Users\...>go run sample10.go repo:golang/go is:open json decoder 一ヶ月未満 #30701 LouAdrien encoding/json: ignore tag "-" not working on embedded s(2019-03-09) 一年未満 #29688 sheerun proposal: encoding/json: add InputOffset to json decode(2019-01-11) #29686 sheerun json: Add InputOffset for stream byte offset access(2019-01-11) #30301 zelch encoding/xml: option to treat unknown fields as an erro(2019-02-18) #29035 jaswdr proposal: encoding/json: add error var to compare the (2018-11-30) #28923 mvdan encoding/json: speed up the decoding scanner(2018-11-22) #28143 Carpetsmo proposal: encoding/json: add "readonly" tag(2018-10-11) #26946 deuill encoding/json: clarify what happens when unmarshaling i(2018-08-12) #28189 adnsv encoding/json: confusing errors when unmarshaling custo(2018-10-13) #27179 lavalamp encoding/json: no way to preserve the order of map keys(2018-08-23) #28941 mvdan cmd/compile: teach prove about slice expressions(2018-11-25) #28952 mvdan cmd/compile: consider teaching prove about unexported i(2018-11-26) #25426 josharian cmd/compile: revisit statement boundaries CL peformance(2018-05-16) 一年以上 #11046 kurin encoding/json: Decoder internally buffers full input(2015-06-03) #12001 lukescott encoding/json: Marshaler/Unmarshaler not stream friendl(2015-08-03) #16212 josharian encoding/json: do all reflect work before decoding(2016-06-29) #5901 rsc encoding/json: allow override type marshaling(2013-07-17) #14750 cyberphon encoding/json: parser ignores the case of member names(2016-03-10) #22752 buyology proposal: encoding/json: add access to the underlying d(2017-11-15) #7872 extempora encoding/json: Encoder internally buffers full output(2014-04-26) #7213 davechene cmd/compile: escape analysis oddity(2014-01-27) #20528 jvshahid net/http: connection reuse does not work happily with n(2017-05-30) #17609 nathanjsw encoding/json: ambiguous fields are marshalled(2016-10-26) #19636 josselin- encoding/base64: decoding is slow(2017-03-21) #20754 rsc encoding/xml: unmarshal only processes first XML elemen(2017-06-22) #22816 ganelon13 encoding/json: include field name in unmarshal error me(2017-11-20) #21092 trotha01 encoding/json: unmarshal into slice reuses element data(2017-07-19) #15808 randall77 cmd/compile: loads/constants not lifted out of loop(2016-05-24) #5819 gopherbot encoding/gob: encoder should ignore embedded structs wi(2013-06-30) #20206 markdryan encoding/base64: encoding is slow(2017-05-02) C:\Users\...>
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