Video: Yuav ua li cas xyuas StringBuilder yog khoob lossis tsis nyob hauv C#?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Txoj kev ntev ntawm cov StringBuilder lossis StringBuffer chav kawm rov qab qhov ntev ntawm cov kab ke ntawm cov cim nws tam sim no muaj. Raws li koj tuaj yeem pom hauv qhov piv txwv, mus kuaj yog tias tus StringBuilder yog khoob , tau qhov ntev ntawm lub StringBuilder khoom. Yog tias qhov ntev yog 0, nws yog khoob , txwv tsis pub tsis yog.
Tsis tas li ntawd, yuav ua li cas xyuas StringBuilder yog khoob lossis tsis nyob hauv C#?
Rov qab integer tus nqi sawv cev qhov ntev ntawm StringBuilder piv txwv. Yog li, peb ua tau kuaj seb a StringBuilder khoom yog khoob los ntawm kev siv nws Length cuab yeej. Yog StringBuilder . Ntev cov khoom xa rov qab xoom (0) ces peb tuaj yeem txiav txim tus StringBuilder khoom yog khoob ( tsis muaj tus cwj pwm muaj nyob hauv StringBuilder ).
Kev siv StringBuilder hauv C# yog dab tsi? Hauv c# , StringBuilder yog ib chav kawm uas yog siv los sawv cev ib txoj hlua mutable ntawm cov cim thiab nws yog ib yam khoom ntawm System. Cov ntawv sau npe. Zoo li txoj hlua hauv c# , peb ua tau siv a StringBuilder los tsim ib qho kev sib txawv los tuav txhua yam ntawm cov ntawv nyeem uas yog ib ntus sau cov cim raws li peb cov cai.
Ib yam li ntawd, koj tuaj yeem nug, koj ua li cas StringBuilder khoob?
Txoj kev rho tawm lees txais ob qhov ntsuas, pib qhov ntsuas thiab qhov ntsuas kawg. Rau meej cov ntsiab lus, peb yuav muab 0 raws li pib Performance index thiab ntev ntawm tus StringBuilder khoom raws li qhov kawg index rau meej txhua yam nws muaj. Raws li koj tuaj yeem pom los ntawm cov zis, cov ntsiab lus ntawm cov StringBuilder yog cleared thaum pib ntawm lub voj.
Ib txoj hlua puas tuaj yeem ua tsis tau C#?
Hauv C# , IsNullOrEmpty() yog a txoj hlua txoj kev. A txoj hlua yuav ua null yog nws tsis tau muab tus nqi. A txoj hlua yuav yuav khoob yog tias nws tau muab "" lossis Txoj hlua . Empty (Ib qho tas li rau khoob hlua ).
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