1. ã¯ããã«
ãããããšã³ãžãã¢ãªã³ã°ã®äžçã«è¶³ãèžã¿å ¥ããçæ§ããããã¯æ°ããªã¹ãã«ã®åŠç¿ãæ€èšããŠããçæ§ãããã°ã©ãã³ã°èšèªã®äžã€ã§ããGoèšèªã®é åãšããã®è³æ ŒååŸã®æ¹æ³ã«ã€ããŠèå¯ãæ·±ããŠããããšã§ãçæ§ã®åŠã³ã®éããã¹ãšãªãã°å¹žãã§ãã
1.1 Goèšèªãšã¯?
Goèšèªã¯ãGoogleãéçºã«é¢äžããããã°ã©ãã³ã°èšèªã§ãCèšèªãããŒã¹ã«ãã€ã€ãçŸä»£ã®ã³ã³ãã¥ãŒã¿ãŒã·ã¹ãã ã«é©ããæ©èœãæ°å€ãå«ãã§ããŸãããããã®æ©èœã«ãããé«æ§èœãã€å€§èŠæš¡ãªã·ã¹ãã éçºãå¯èœãšãªããã¯ã©ãŠãã·ã¹ãã ããããã¯ãŒã¯ã·ã¹ãã ã®å®è£ ã«åºã䜿ãããŠããŸãã
1.2 Goèšèªã®ç¹åŸŽ
Goèšèªã®ç¹åŸŽã¯ã以äžã®äžã€ãæããããšãã§ããŸããã·ã³ãã«ãªææ³ãé«éãªå®è¡é床ããããŠäžŠè¡åŠçã®å®¹æãã§ãã
ãŸãäžã€ç®ãã·ã³ãã«ãªææ³ã«ã€ããŠã§ããGoèšèªã¯ããã®ææ³ãéåžžã«ã·ã³ãã«ã§ããããšãç¹åŸŽãšãªã£ãŠããŸããå ·äœçã«ã¯ãä»ã®äžéšã®èšèªãšæ¯ã¹ãŠæ§æãå°ãªãããã®ååŠã³ããããšãããŠããŸããããã«ãããã³ãŒãã£ã³ã°ãéããåé¡è§£æ±ºã«çŠç¹ãããŠãããšãã§ããçç£æ§ãåäžããããšãæåŸ ã§ããŸãã
次ã«ãé«éãªå®è¡é床ã§ããGoèšèªã¯ãã³ã³ãã€ã«èšèªã§ããããå®è¡é床ãéåžžã«é«ããšããç¹åŸŽããããŸãããã®ãããé«è² è·ãªWebãµãŒãã¹ãªã©ã®éçºã«ãé©ããŠããŸãã
æåŸã«ã䞊è¡åŠçã®å®¹æãã§ããGoèšèªã¯ãGoã«ãŒãã³ãšãã£ãã«ãšåŒã°ããç¬èªã®æ©èœãèšããŠãããããã«ããæ¯èŒçç°¡åã«äžŠè¡åŠçãæ±ãããšãã§ãããšããç¹é·ããããŸããããã¯ããã«ãã³ã¢ã®CPUãæå¹ã«æŽ»çšããããã®éèŠãªæè¡ãšãªããŸãã
ãããã®ç¹åŸŽã«ããGoèšèªã¯ãçŸä»£ã®è€éãªã·ã¹ãã ãå¹ççã«éçºããããã®åŒ·åãªããŒã«ãšããŠæ³šç®ãããå¹ åºãå Žé¢ã§æ¡çšãããŠããŸãã
2. Goèšèªã®åºæ¬
ããã§ã¯ãããã°ã©ãã³ã°èšèªGoã®åºæ¬çãªæŠå¿µãããªãã¡ãå€æ°ãšåãæŒç®åãšå¶åŸ¡æ§æãé¢æ°ãããã±ãŒãžãšã¢ãžã¥ãŒã«ã«ã€ããŠèª¬æããŸãã
2.1 å€æ°ãšå
Goèšèªã®å€æ°ã¯ãããŒã¿ãä¿åããããã®ç®±ã®ãããªãã®ã§ããå€æ°ã䜿ãããšã§ãèšç®çµæãä¿åãããããã®çµæãåå©çšãããããããšãå¯èœãšãªããŸããGoèšèªã§ã¯ãvar
ããŒã¯ãŒãã䜿ã£ãŠå€æ°ã宣èšããŸãããŸããGoèšèªã¯éçåä»ãèšèªã§ããããåãã䜿ã£ãŠå€æ°ãä¿åã§ããããŒã¿ã®çš®é¡ãå¶éããŠããŸããåºæ¬çãªåã«ã¯ãæŽæ°ãè¡šãint
ãæååãè¡šãstring
ãçåœå€ãè¡šãbool
ãªã©ãå«ãŸããŸãã
2.2 æŒç®åãšå¶åŸ¡æ§æ
Goèšèªã«ã¯è€æ°ã®æŒç®åãååšããããããçµã¿åãããããšã§æ§ã
ãªåŠçãè¡ãããšãå¯èœã§ããæŒç®åã«ã¯ãç®è¡æŒç®åã代å
¥æŒç®åãæ¯èŒæŒç®åãªã©ãå«ãŸããŸãããŸããå¶åŸ¡æ§æã䜿ã£ãŠãããã°ã©ã ã®å®è¡ãããŒãã³ã³ãããŒã«ããŸããGoèšèªã®äž»èŠãªå¶åŸ¡æ§æã«ã¯ãæ¡ä»¶åå²ãèšè¿°ããif
ãç¹°ãè¿ãåŠçãèšè¿°ããfor
ãªã©ããããŸãã
2.3 é¢æ°
åŠçã®ãŸãšãŸããè¡šããŠããããé¢æ°ãšãããŸããGoèšèªã§ã¯ãfunc
ããŒã¯ãŒãã䜿ã£ãŠé¢æ°ã宣èšããŸããé¢æ°ã¯å
¥åïŒåŒæ°ïŒãåãåããåŠççµæïŒæ»ãå€ïŒãè¿ãããšãã§ããŸãã
2.4 ããã±ãŒãžãšã¢ãžã¥ãŒã«
Goèšèªã®ã³ãŒãã¯ããã±ãŒãžãšããåäœã§ modularize ãããŠããŸããããã±ãŒãžã¯é¢é£ããGoã®ãœãŒã¹ã³ãŒããäžç·ã«ãŸãšããŠç®¡çããŸãããŸããè€æ°ã®ããã±ãŒãžããŸãšããŠããŒãžã§ã³ç®¡çããåäœãã¢ãžã¥ãŒã«ãšãããŸããGoèšèªã§ã¯ãimport
ã¹ããŒãã¡ã³ãã䜿ã£ãŠä»ã®ããã±ãŒãžãåç
§ããããšãã§ããŸãã
3. Goèšèªã®çºå±
ãã®ç« ã§ã¯ãGoèšèªã®é²æ©çãªåŽé¢ãæ¢ã£ãŠãããŸãããããŸãã¯ç¬èªã®ããŒã¿åã®äœæã次ã«ãšã©ãŒåŠçãæåŸã«GoroutinesãšChannelsã«ã€ããŠèª¬æããŸãã
3.1 ç¬èªã®ããŒã©åã®äœæ
Goèšèªã«ã¯type
ããŒã¯ãŒãã䜿çšããç¬èªã®ããŒã¿åãå®çŸ©ããæ©èœããããŸããããã¯ä»ã®èšèªã§ã¯ãšã€ãªã¢ã¹ãã¯ã©ã¹ãšåŒã°ãããã®ã«è¿ãæŠå¿µã§ããåºæ¬åãã掟çããæ°ããåãäœæããããšã§ãã³ãŒãã®å¯èªæ§ãšä¿å®æ§ãåäžãããç¹å®ã®ã«ãŒã«ãå¶çŽãåã¬ãã«ã§åŒ·å¶ã§ããŸããstructãçšããŠè€æ°ã®ããŒã¿ãã£ãŒã«ããæã€ç¬èªã®ããŒã¿åãäœãããšãã§ããŸãã
3.2 ãšã©ãŒåŠç
å€ãã®ããã°ã©ãã³ã°èšèªã§ã¯äŸå€åŠçã«ãããšã©ãŒããã³ããªã³ã°ããŸãããGoèšèªã§ã¯error
åãçšããè¿åŽå€ã«ãããšã©ãŒãã³ããªã³ã°ãäžè¬çã§ãããã®æŠç¥ã¯ãã³ãŒãã®æµããèªç¶ã«ä¿ã¡ãèŠãç®ããããããããªããšããã¡ãªããããããŸããerroråã¯ã€ã³ã¿ãŒãã§ãŒã¹ã§ãError
ã¡ãœãããæã€ä»»æã®ãªããžã§ã¯ããè¿ãããšãã§ããŸããããã«ãããç¶æ³ã«å¿ãããšã©ãŒã¡ãã»ãŒãžããšã©ãŒæ
å ±ãäœæã§ããŸãã
3.3 GoroutinesãšChannels
Goèšèªã®å€§ããªç¹åŸŽã®1ã€ã䞊è¡åŠçã容æã«è¡ããGoroutinesãšChannelsã§ããGoroutineã¯Goã®é¢æ°ã䞊è¡å®è¡ããããã®ä»çµã¿ã§ãéåžžã«è»œéãªã¹ã¬ãããšèããããšãã§ããŸãã
go
ããŒã¯ãŒããåã«èšè¿°ããã ãã§é¢æ°ãGoroutineãšããŠå®è¡ã§ããŸãããŸãããããã®Goroutineséã§ããŒã¿ãå®å
šã«ããåãããããã«ChannelsãçšæãããŠããŸãã
channelã¯ãGoroutineséã§ããŒã¿ã®éåä¿¡ãè¡ãããã®ãã€ãã©ã€ã³ãšããŠæ©èœããããŒã¿ç«¶åãã¿ã€ãã³ã°åé¡ãæ°ã«ããã«ããŒã¿ãéä¿¡ã§ããŸãããã®çµã¿åããã«ãããGoèšèªã§ã¯å¹ççãªäžŠè¡åŠçãè¡ããŸãã
4. Goèšèªã§ã®ãããžã§ã¯ãäœæ
ããã§ã¯ãGoèšèªã§ã®ãããžã§ã¯ãäœæã«ã€ããŠè§£èª¬ããŸããå ·äœçã«ã¯ãéçºç°å¢ã®æ§ç¯æ¹æ³ããµã³ãã«ã¢ããªã±ãŒã·ã§ã³ã®äœææ¹æ³ããã¹ããšãããã°ã®åºæ¬ç¥èã«ã€ããŠèª¬æããŸãã
4.1 éçºç°å¢ã®æ§ç¯
Goèšèªãããžã§ã¯ãã§äžçªæåã«è¡ãããšã¯ãéçºç°å¢ã®æ§ç¯ã§ããåºæ¬çã«Goèšèªã®éçºã«ã¯ãGoèšèªã¹ã¿ã³ããŒããšãã£ã·ã§ã³ãšçµ±åéçºç°å¢ãå¿ èŠã§ãããããã®ã€ã³ã¹ããŒã«ããèšå®ã«ã€ããŠè§£èª¬ããŸãã
Goèšèªã®ã€ã³ã¹ããŒã«
ãŸãGoèšèªã®å ¬åŒãµã€ãããææ°çãããŠã³ããŒãããããªãã®ãªãã¬ãŒãã£ã³ã°ã·ã¹ãã ã«åã£ããã®ãéžæããŠã€ã³ã¹ããŒã«ããŠãã ãããã€ã³ã¹ããŒã«ãæåãããšãGoã®ã³ãã³ãã䜿ãããšãã§ããããã«ãªããŸãã
çµ±åéçºç°å¢(IDE)ã®æ§ç¯
次ã«ãGoèšèªã®ã³ãŒãã£ã³ã°ãå¹çåããããã®IDEã®èšå®ãããŸããIDEãšããŠããå©çšãããã®ã¯ãVSCodeãGoLandãªã©ã§ããèªèº«ã®å¥œã¿ã®IDEãéžãã§èšå®ããŸãããã
4.2 ãµã³ãã«ã¢ããªã±ãŒã·ã§ã³ã®äœæ
éçºç°å¢ãæŽã£ããããµã³ãã«ã¢ããªã±ãŒã·ã§ã³ãäœæããŸããä»åã¯ç°¡åãªã³ãã³ãã©ã€ã³ã¢ããªã±ãŒã·ã§ã³ãäœæããããšã«ããŸãããã
package main
import "fmt"
func main() {
fmt.Println("Hello, Go Project")
}
ããã”hello.go”ãšãããã¡ã€ã«åã§ä¿åããã³ãã³ãã©ã€ã³ãã”go run hello.go”ãšæã¡èŸŒãã°ã”Hello, Go Project”ãšè¡šç€ºãããã¯ãã§ãããããæåã®Goèšèªã¢ããªã±ãŒã·ã§ã³ã®å®æã§ãã
4.3 ãã¹ããšãããã°
Goèšèªã®éçºã§ã¯ãããã°ã©ã ãæåŸ éãã«åäœããããšã確èªãããã¹ããæ¬ ãããŸãããGoèšèªã«ã¯æšæºã®ãã¹ãããŒã«ãä»å±ããŠããŸãã®ã§ãããã䜿ã£ãŠãã¹ãã³ãŒããæžããŠã¿ãŸãã
ãã¹ãã®äœæ
package main
import "testing"
func TestMain(t *testing.T) {
result := hello()
if result != "Hello, Go Project" {
t.Errorf("Expected 'Hello, Go Project', got %s", result)
}
}
ãã¹ãã¯ãã®ããã«æžããŸãããããŠã³ãã³ãã©ã€ã³ãã”go test”ãšå ¥åãããšãã¹ããå®è¡ãããŸãã
ãããã°
ããã°ã©ã ãæåŸ éãã«åããªãã£ããšãã¯ããããã°ãè¡ããŸããVSCodeãªã©ã®IDEã«ã¯ãããã°ããŒã«ãä»å±ããŠããã®ã§ããã¬ãŒã¯ãã€ã³ããèšå®ããã¹ãããå®è¡ã§ããã°ã©ã ã®æåã確èªããããšãã§ããŸãã
以äžã§Goèšèªã§ã®ãããžã§ã¯ãäœæã®åºæ¬çãªæ¹æ³ã«ã€ããŠè§£èª¬ããŸããã次ã®ã¹ããããšããŠãè³æ Œã§æ±ããããªããè€éãªã¢ããªã±ãŒã·ã§ã³ã®äœæã«ææŠããŠã¿ãŠãã ããã
5. Goèšèªã®è³æ Œæ å ±
è¿å¹ŽãGoèšèªã®éèŠãå¢ããŠããŠããããã®æè²ããã°ã©ã ãè³æ Œèªå®ã泚ç®ãéããŠããŸããã§ã¯å ·äœçã«ãGoèšèªã®è³æ Œãšã¯äœãªã®ã§ããããïŒ
5.1 Goèšèªã®è³æ Œãšã¯ïŒ
Goèšèªã®è³æ Œãšããã®ã¯ããã®åã®éããGoèšèªã«é¢ããç¥èãšæè¡ã«ã€ããŠãäžå®ã®ã¬ãã«ã«éããŠããããšã瀺ãèªå®ã®ããšãæããŸããè©ŠéšãåããŠåæ Œããããšã«ããããã®è³æ Œãç²åŸããããšãã§ããŸããGoèšèªã«å¯Ÿããæ·±ãç解ãšããããçšããéçºèœåã蚌æãããã®ã§ãã
5.2 è³æ Œã®çš®é¡
çŸåšãGoèšèªã®è³æ Œã¯äž»ã«Google Developers Certification㮓Go Developer”ãšããäžçš®é¡ããããŸãããã®èšŒææžã¯ãåã ãGoèšèªã䜿çšããŠã¢ããªã±ãŒã·ã§ã³ãäœæããã¹ãããããã°ããGoã®ã³ã¢æ©èœãšæšæºåãããã©ã€ãã©ãªã®äœ¿çšãçµéšããããšã蚌æããŸãã
5.3 è³æ Œã®ã¡ãªãã
ã§ã¯ããã®è³æ Œãæã€ããšã§ã©ã®ãããªå©ç¹ãããã®ã§ããããïŒãŸããGoèšèªã®è³æ Œãæã€ããšã¯ãããªããGoèšèªã«ã€ããŠæ·±ãç¥èãšå®è·µçãªçµéšãæããŠããããšãå ¬åŒã«èªããããããã§ããããã¯æ±è·æŽ»åæã«å€§ããªåŒ·ã¿ãšãªããŸãããŸãã蚌ææžãæã«ããããšã§ãèªåèªèº«ã®æè¡åãžã®èªä¿¡ãæ·±ãŸããŸãã
ããã«ãè³æ ŒååŸã®éçšã§åŠã°ããGoèšèªã®æ·±ãç¥èãšå®è·µçãªçµéšã¯ãå®éã®ãããžã§ã¯ãã§ã®çç£æ§ãåäžãããåé¡è§£æ±ºã®ã¹ãã«ã磚ãããšã«ãã€ãªãããŸããã€ãŸããè³æ ŒååŸã¯èªå·±åçºã®äžç°ãšããŠãéåžžã«äŸ¡å€ããããšãããã§ãããã
6. Goèšèªè³æ Œã®ååŸæ¹æ³
ããã§ã¯å ·äœçã«ãããªããã©ã®ããã«ããŠGoèšèªã®è³æ ŒãååŸã§ããã®ãã詳现ã«èª¬æããŸãããŸãæåã«ãåéšã®è³æ ŒèŠä»¶ã«ã€ããŠèª¬æãã次ã«å®éã®åéšæ¹æ³ãšåæ Œã©ã€ã³ã«ã€ããŠè§£èª¬ããŸãã
6.1 åéšè³æ Œ
Goèšèªã®è³æ Œè©Šéšã«ã¯ç¹å¥ãªåéšè³æ Œãå¿ èŠã§ããåºæ¬çã«ã¯ãGoèšèªã«ã€ããŠåºç€çãªç¥èãäžå®ã®çµéšãæ±ããããŸããããããç¹å®ã®åŠæŽãè·æŽãå¿ èŠãšãããã®ã§ã¯ãããŸãããã€ãŸããGoèšèªãåŠã³å§ããã°ããã®æ¹ã§ããèªå·±åŠç¿ããªã³ã©ã€ã³åŠç¿ãªã©ãéããŠååãªç¥èãšæèœã身ã«ã€ããå Žåãè©Šéšãåããè³æ ŒããããŸãããã®ç¹ã¯ã誰ã§ãGoèšèªã®æè¡ãç¿åŸãè³æ ŒãååŸãããã£ã³ã¹ãããããšãæå³ããŸãã
6.2 åéšæ¹æ³
äžéšã®è³æ Œè©Šéšã§ã¯ãè©Šéšãåããããã®äºåã®ç»é²ãäºçŽãå¿ èŠãšãªãå ŽåããããŸãããããã¯éåžžãè©Šéšäž»å¬å£äœã®ãŠã§ããµã€ãã§è¡ãããšãã§ããŸããè©Šéšã®äºçŽãããéã«ã¯ãè©Šéšæ¥æãäŒå Žãéžæããããšã«ãªãã§ãããã
ãŸããè©Šéšåé¡ã¯å®éã®Goèšèªã®éçºã·ããªãªãæš¡ãããã®ãå€ããå ·äœçãªããã°ã©ã ã®èšèšãã³ãŒãã£ã³ã°ãæ±ããããŸãããããã®åé¡ã¯ãããªããGoèšèªãçŸå Žã§ã©ãã ãå¹æçã«äœ¿ããããè©Šããã®ã§ãGoèšèªã®ææ³ãæŠå¿µã ãã§ãªãããããã䜿ã£ãåé¡è§£æ±ºã®èœåãåæã«è©äŸ¡ãããŸãã
6.3 åæ Œã©ã€ã³
Goèšèªã®è³æ Œè©Šéšã®åæ Œã©ã€ã³ã¯è©Šéšããšã«ç°ãªããŸãããå€ãã®å Žåãå šåé¡äžçŽ70%以äžæ£è§£ããå¿ èŠããããŸããäžéšã®è©Šéšã§ã¯ãåã»ã¯ã·ã§ã³ããšã«æäœéã®åŸç¹ãèšå®ãããŠãããå šã»ã¯ã·ã§ã³ã§ãã®åŸç¹ãè¶ ããªããã°åæ Œãšãªããªãå ŽåããããŸãã
ãããèå¿ãªããšã¯ãåæ Œã©ã€ã³ãè¶ ããããšããããGoèšèªã®ç¥èãã¹ãã«ã確åºãããã®ã«ããããšã§ãããã®ã¹ãã«ãããã°ãè³æ Œè©Šéšã ãã§ãªããå®éã®çŸå Žã§ã掻èºããããšãå¯èœã«ãªããŸãã
7. Goèšèªè³æ Œã®åŠç¿æé
Goèšèªã®è³æ ŒååŸãç®æããªãã°ãã·ã¹ãããã£ãã¯ãªåŠç¿æ¹æ³ãæ±ããããŸããè³æ ŒååŸã«åããŠã®åŠç¿ã¯ã倧ããåããŠ3ã€ã®ã¹ãããããæ§æãããŸãã
7.1 åŠç¿èšç»ã®äœæ
åŠç¿èšç»ã®äœæã¯ãè³æ ŒååŸã«ãããäžæ©ç®ã§ããè©Šéšç¯å²ãç解ãããããã©ã®çšåºŠã®æéã§åŠã³ããããæ¥ã äœæéã®åŠç¿æéãè²»ãããããšãã£ãã¹ã±ãžã¥ãŒã«ãçå®ããŠãããŸãããã
ãŸããéèŠãªã®ã¯èªåèªèº«ã®ç解床ãšããŒã¹ãè©äŸ¡ããããšã§ããGoèšèªã®åºæ¬ããå¿çšãŸã§ãå æ¬çã«åŠã¶ããã«ã¯ãèªåèªèº«ã®ç解床ãå®æçã«ãã§ãã¯ããåŠç¿èšç»ããã®éœåºŠèŠçŽãæè»ãªå§¿å¢ãæ±ããããŸãã
7.2 ãªã¹ã¹ã¡ã®åŠç¿ãªãœãŒã¹
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