Video: Daim duab qhia cov ntaub ntawv yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A Daim ntawv qhia yog ib hom kev tshawb nrhiav ceev ceev cov ntaub ntawv qauv uas muaj qhov hloov tau yooj yim ntawm indexing rau hauv nws tus kheej cov ntsiab lus. Cov yuam sij no, nrog rau cov ntaub ntawv tus nqi txuam nrog lawv, yog khaws cia rau hauv lub Daim ntawv qhia . Txhua qhov nkag ntawm a Daim ntawv qhia muaj ib qho tseem ceeb tshwj xeeb thiab nws cov nqi sib xws.
Hauv qhov no, cov ntaub ntawv twg yog siv hauv daim ntawv qhia?
associative array
Tom qab, lo lus nug yog, daim ntawv qhia cov ntaub ntawv khaws cia li cas? Maps yog khaws cia raws li graphs, los yog ob seem arrays ntawm cov khoom uas muaj cov yam ntxwv ntawm qhov chaw thiab qeb, qhov twg ib co hom muaj xws li chaw ua si, txoj kev, nroog, thiab lwm yam. A daim ntawv qhia database sawv cev rau txoj kev network nrog rau cov yam ntxwv cuam tshuam.
Tib neeg kuj nug, dab tsi yog qhov teeb tsa cov ntaub ntawv?
Txhais. A Teeb yog abstract cov ntaub ntawv hom uas tuaj yeem khaws qee qhov txiaj ntsig, tsis muaj kev txiav txim tshwj xeeb, thiab tsis muaj qhov tseem ceeb dua. Nws yog ib lub computer siv lub tswv yim lej ntawm ib tug finite Teeb . Los ntawm Wikipedia. Cov Teeb cov ntaub ntawv qauv feem ntau yog siv los kuaj seb cov khoom puas yog teeb ntawm qhov muaj nqis.
C++ map yog dab tsi?
Maps yog ib feem ntawm cov C++ STL. Maps yog cov thawv sib koom ua ke uas khaws cov khoom sib xyaw ua ke ntawm cov txiaj ntsig tseem ceeb thiab daim ntawv qhia qhov tseem ceeb uas ua raws li kev txiav txim tshwj xeeb. Tsis muaj ob daim duab qhia qhov tseem ceeb tuaj yeem muaj qhov tseem ceeb tib yam. Hauv C++, daim ntawv qhia khaws cov txiaj ntsig tseem ceeb hauv qhov kev txiav txim nce mus los ntawm lub neej ntawd.
Pom zoo:
Cov ntaub ntawv txuas ntxiv rau daim ntawv nthuav qhia yog dab tsi?
Cov ntaub ntawv nthuav dav dav dav thiab lawv cov ntaub ntawv tawm tswv yim suav nrog XLSX (Microsoft Excel Qhib XML Spreadsheet), ODS (OpenDocument Spreadsheet) thiab XLS (Microsoft Excel Binary File Format)
Dab tsi yog daim teb uas muaj cov ntaub ntawv tshwj xeeb rau cov ntaub ntawv?
Kev teeb tsa thawj tus yuam sij Tus yuam sij tseem ceeb yog daim teb uas muaj cov ntaub ntawv tshwj xeeb rau txhua cov ntaub ntawv
Vim li cas kem taw qhia cov ntaub ntawv khaws cia ua cov ntaub ntawv nkag ntawm disks sai dua li kab qhia cov ntaub ntawv khaws cia?
Kem oriented databases (aka columnar databases) yog qhov tsim nyog rau kev ntsuas kev ua haujlwm ntau dua vim tias cov ntaub ntawv hom ntawv (kem hom) qiv nws tus kheej kom nrawm dua cov lus nug ua - scans, aggregation thiab lwm yam. Ntawm qhov tod tes, kab oriented databases khaws ib kab (thiab tag nrho nws. kab) contiguously
Dab tsi yog cov teeb meem ntawm kev tswj cov ntaub ntawv hauv cov ntaub ntawv ib txwm muaj?
Nyob rau tib lub sijhawm, qhov kev tswj hwm cov ntaub ntawv ib puag ncig tsim teeb meem xws li cov ntaub ntawv rov ua dua thiab tsis sib xws, cov kev pab cuam-cov ntaub ntawv dependence, inflexibility, tsis muaj kev ruaj ntseg, thiab tsis muaj cov ntaub ntawv sib qhia thiab muaj
Dab tsi yog txoj hauv kev zoo los tso saib cov ntaub ntawv hauv daim duab duab?
Teb: Daim duab duab yog ib txoj hauv kev zoo los tso saib cov ntaub ntawv hauv daim duab duab. Kev piav qhia: Daim duab kos duab yog siv los sawv cev rau txhua yam hauv daim duab lossis qee cov cim me me uas tuaj yeem sau rau leej twg lossis txhua yam duab lossis duab bypictograms