Rehashing ntawm daim ntawv qhia hash ua tiav thaum tus naj npawb ntawm cov ntsiab lus hauv daim duab qhia txog tus nqi siab tshaj plaws. Thaum rehashing tshwm sim ib qho tshiab hash muaj nuj nqi lossis txawm tias tib lub hash muaj nuj nqi yuav siv tau tab sis cov thoob uas cov nqi tam sim no tuaj yeem hloov pauv.
rehashing muab piv txwv yog dab tsi?
Rehashing is a technique in which the table is resize, i.e., the size of table is doubled by creation a new table. Nws yog qhov zoo dua yog tag nrho qhov loj ntawm lub rooj yog tus lej tseem ceeb. Muaj cov xwm txheej uas yuav tsum tau ua kom rehashing. • Thaum lub rooj puv tag.
Puas rehashing thiab ob hashing tib yam?
Ob chav Hashing lossis rehashing: Hash tus yuam sij thib ob, siv qhov sib txawv hash ua haujlwm, thiab siv qhov tshwm sim raws li cov kauj ruam loj. Rau tus yuam sij muab cov kauj ruam loj tseem nyob tas li thoob plaws qhov kev sojntsuam, tab sis nws txawv rau cov yuam sij sib txawv. … Ob chav hashing xav kom qhov loj ntawm lub rooj hash yog tus lej tseem ceeb.
Hashmap nce qhov loj npaum li cas?
Thaum 13th lub caij (tus nqi tseem ceeb) yuav los rau hauv Hashmap, nws yuav nce nws qhov loj los ntawm default 2 4=16 thoob rau 2 5=32 thoob. Lwm txoj hauv kev los xam qhov loj me: Thaum qhov load yam piv (m / n) nce mus txog 0.75 ntawm lub sijhawm ntawd, hashmap nce nws lub peev xwm.
Hash table load factor yog dab tsi?
Tus nqi thauj khoom yog ntsuas qhov puv ntawm lub rooj hash tso cai kom tau ua ntej nws lub peev xwm tau nce siab.
