
ãå ¬åŒèšé²é·ç·šæ ç» null²ïŒã¬ãã¬ãïŒä»®ïŒïŒã#null2 #expo2025 #ããããªããã¢ãµããšã³ã¹
ãšããããã§ãå
¬åŒèšé²é·ç·šæ ç» null²ïŒã¬ãã¬ãïŒä»®ïŒïŒãã®äºåç·šãã§ããŸããïŒ ã 2025幎ã®å€§éªé¢è¥¿äžåã§å·»ãèµ·ãã£ãnull²ã®ç©èªãèœåïŒç·åç£ä¿®ïŒã𿣮ããïŒç£ç£ïŒãšå€§æšããïŒå¶äœçµ±æ¬ïŒã®äžäººã§æ ç»ã®åœ¢ã«çŽ¡ãã§ããŸãïŒ
ãã®æ ç»ãäœãã®å€§å€ã ããïŒã§ãçããæ¬åœã«ããããšãïŒãŸã ã§ããŠãŸãããäžæŠãå ±åã§ããã¹ããŒãžã«æ¥ãŸããïŒä»ãŸã§ãã£ãšnull²ãã©ãäŒãããïŒå
¥ã£ã人ãå
¥ããªãã£ã人ã«ãäœãæ®ãããã®ããªããïŒãããªæ°æã¡ã§æã
ã¯æ ç»ãæ®ãç¶ããŠããŸããïŒãããªãªã³ã¯ãªããªãïŒäžåã¯åžžã«çµããã«åãã£ãŠããä»®èšã®ãã®ïŒåãäžç¬ã®èŒãã§ãïŒ null²ãšãããããªãªã³ã¯äžäœäœã ã£ãã®ãïŒãããèªã¿è§£ãïŒäŒããããã«ïŒå€ãã®æèè
ã®æ¹ã
ã«ã€ã³ã¿ãã¥ãŒã«ãååããã ãïŒåœ¢ã«ãªã£ãŠããŸããïŒã€ã³ã¿ãã¥ãŒã«ãåå ããã ããå€ãã®æèè
ã®æ¹ã
ã«å
šèº«å
šéã®æè¬ãéããããšæããŸãïŒå°ãã§ãå€ãã®äººã«ãããªãªã³ã®ã¡ãã»ãŒãžãå±ããšå¬ããã§ãïŒãããŠnull²ã«é¢ãã£ãŠãããçæ§ã«æè¬ãïŒäžåæéäžã«å
¥ããªãã£ãçããã«ãäœããæã£ãŠåž°ã£ãŠããã ããããã«é 匵ã£ãŠå¶äœããŠããŸãïŒãã€ããããªãªã³ã®ããšãæããŠãããŠããããšãïŒäœå®¶å¥å©ã«å°œããåã³ã§ãïŒ 2019å¹ŽïŒæŽå°ã®äžåäŒå Žã蚪ãããšãããå§ãŸãïŒäžåã®ããŒã通ãšããŠnull²ãåºæ¥ïŒãããŠåã³ãã«ã«éã£ãŠãã宿åœã®ããšïŒæã
ã¯ã©ããã£ãŠãã®ïŒïŒïŒæ¥éïŒæºåæéãé§ãæããŠïŒã©ããªæ°æã¡ã§éãããŠïŒããã¯ã©ããã£ãŠåãåãããŠãã£ãã®ãïŒããã«å¯çãïŒæãïŒäžã®ç©èªãã©ãè§£éãããïŒå€ã§ã¯ã©ããªç©èªã ã£ãã®ãïŒãããæããããæ ç»ã«ä»äžããã€ããã§éæé 匵ã£ãŠããŸãïŒ ãããªãªã³ã¯ãªããªãïŒãã®åãã®çŽæã®äžæãç«ã€ãç¥ããªãã§ãïŒããããïŒèªåãããŒã ãšäžç·ã«æéæãããŠè²ã
ãªãã®ãç ç²ã«ããŠäœã£ã倧åãªäœåã§ãããäžåçµãã£ãããšãå£ããããªãã§ãããïŒãã®null²ã¯èœåéœäžå²äžäžçªã§ãã圫å»äœåã§ãïŒãããŠå»ºç¯ã®å
å€ãäžäœåããã·ã¢ã¿ãŒã§ããïŒæ åãšç«äœçãªåäœãåäœããèšç®æ©èªç¶ã®çãç©ã§ããïŒïŒïŒä»£ã®ïŒå¹Žéãè©°ãŸã£ãäœåã§ãïŒãããå£ããŠããããšãžã®æ²ãã¿ã¯äººäžåæããŠããã€ããã§ãïŒå§ãŸã£ãç¬éããçµããã«åãã£ãŠæ©ããŠããïŒãã«ã«éãçŽæããå§ãŸã£ããããªãªã³ã§ãïŒ ããã人çã«ã¯åžžã«å¥ãã¯ãããïŒäžç©ã¯ãã«ã«éãïŒç©è³ªãšããŠæ®ããªããã®ã¯ç©èªãšããŠæ®ããããªãïŒããããã®ç©èªãæéãèšå·ãææŸããŠããã®ã人çã ãšæããŸãïŒãã®èãé£ãå¥ããåªå€±ã®æ²ãã¿ïŒããã§ãäœããç¶ãåã³ãšåãåãç¶ããäžã§ïŒãç©èªãåœ¢ãææŸããŠãããã®ããã®null²ãšãããããªãªã³ã ãšãããªãïŒç§ã¯ãããããªãããšãããããšãããã¿ããªã«èšãããïŒ æãäžæ±ããããŠnullÂ²ã«æ¥ãŠãããã客ããã®ã¿ããªããããšãïŒå¶äœã§äœåºŠãæ«ãããã«ãªããªããïŒè¶³ããªãäºç®ã®äžïŒåè³ãéããªããæåŸãŸã§é 匵ã£ãŠãããå¶äœããŒã ããããšãïŒãéãèªåãã¡ã§éããªããã°ãªããïŒãéãè¶³ããªããŠåç¶ãå±ã¶ãŸããäžæåŒåœã§äœãäžãã仲éã¯äžçã®åéã§ãïŒãããŠéçšãå§ãŸãäžã·ã¹ãã ã®ãã³ãã®ãšãã«é 匵ã£ãŠãããã¹ã¿ããããŒã ããããšãïŒäºæ
ããããªãšããéšã®æ¥ãé¢šã®æ¥ãç©ççã«ããµã€ããŒç©ºéã§ããäžè©±ã«ãªããŸããïŒãŸã184æ¥ãå
±ã«éãããŠãããã¢ãã³ãã³ãã®çããããããšãïŒç¥ç¥ãäœã£ãã®ã¯ãããã£ãæ³ãã ã£ããšæããŸãïŒ ãããŠïŒnull²ã奜ãã«ãªã£ãŠãããã¿ããªããããšãïŒå§çºã§æ¥ãŠãããŠäºçŽãæ®ã£ãŠãããã¿ããªããããšãïŒnullÂ²ã®æãæã£ãŠãããã¿ããªããããšãïŒã³ã¹ãã¬ããŠãããã¿ããªãåçæ®ã£ãŠãããã¿ããªãæ¬åœã«ããããšãïŒãã®ç¬éã«ã¿ããªã奜ãã§ããŠãããnull²ã2025幎ã®å€¢æŽ²ã«ç¢ºãã«ååšããèšé²ãæ ç»ã«æ®ããããšç§ãã¡ã¯èããŸããïŒ ããããã®ãªãäžåã®æéã®äžç¬ã®ãããããèªãç¶ããã®ãšããŠæãåºããŠããŸãïŒå
¬éããæ¥œãã¿ã«ïŒ ïŸïŸã«ãªã£ãŠããŸãnullÂ²ãæ³ããªããæ¥ã
ã®å¶äœã«ç¹ããŠããŸãïŒäžåãã¹ïŒãã«ãã¹ã®çæ§ã«å±ãããïŒã¿ããªã§ïŸïŸã«éããïŒ äžåæåŸã®æ¥ãŸã§ïŒä»ã«ãéèŠãªãç¥ãããç¶ããšæããŸãïŒ
æ®ã13æ¥ïŒæ¥œããã§ãããŸãããïŒçµããã®åããã«æ°ããå§ãŸããä¿¡ããŠïŒ
ãæåŸã«ïŒããããªãïŒãããŠããããšãïŒãŸããã«ã®æ£®ã§äŒããã