- Izwi rekuti 'null' mukombuta rinomiririra kusavapo kwehukoshi uye ndiyo inowanzokonzera kukanganisa.
- Vanhu vane zita rekupedzisira Null vanosangana nematambudziko mumadhijitari masisitimu anodudzira zita ravo sendima isina chinhu.
- Mhosva dzakaita sedzaJoseph Tartaro dzinoratidza kuti kubata zvisina kunaka kwe 'null' mumadhatabhesi kunogona kutungamira kumhedzisiro isingatarisirwe.
- Kuvandudza masisitimu ekudzivirira kududzira zvisirizvo kweNull surname ibasa rakamirira kumakambani mazhinji.
Kana iwe zita rekupedzisira ndiNull, zvinokwanisika kuti wakambosangana nematambudziko nemasisitimu edhijitari pane imwe nguva. Munyika yekombuta, ''null' ipfungwa yakakosha inoratidza kusavapo kwekukosha. Nekudaro, kana surname ichienderana neshoko iri, marudzi ese ematambudziko asingatarisirwe anogona kubuda.
Kubva kurambwa pamafomu, matambudziko nemarekodhi ekutonga uye kunyange mafaindi emumigwagwa asingatarisirwi, zita rekuti Null raratidza kuva marwadzo chaiwo kune vanoritakura. Muchikamu chino, tichaongorora zvakadzama kuti sei chiitiko ichi chichiitika, nyaya dzinonyanya kuzivikanwa, uye zvinogona kugadziriswa.
Chii chinonzi 'Null' mukombuta?
Izwi iri chisina basa Inoshandiswa mukuronga kumiririra iyo kusavapo kwedata. Haisi nhamba, kana nzvimbo isina chinhu, asi nzira yekuratidza kuti munda hauna chinhu kana kuti hauna ruzivo rwakakosha. Pfungwa iyi iripo mumitauro yakawanda yekuronga senge Java, C# uye SQL databases.
Zvimwe chetezvo Tony Hoare, piyona wepfungwa iyi, akabvuma kuti kuiswa kwe 'null' mumasisitimu kwaive "chikanganiso chebhiriyoni-madhora" sezvo yakakonzera kukanganisa kusingaverengeki kwemakomputa uye kunyangwe kukanganisa kwekuchengetedza muzvirongwa zvakasiyana.
Kana surname yava dambudziko
Kuzviuru zvevanhu vane surname Hazvina basa, dambudziko iri harisi kungoda kuziva komputa, asi a kuoma kwemazuva ose. Macomputer masisitimu, kana achidudzira 'null' sendima isina chinhu, anogona kuburitsa zvikanganiso zvinokanganisa maitiro uye marekodhi.
- Paunenge uchizadza mafomu epamhepo, Mazhinji masisitimu anoramba zita rekupedzisira 'Null' achifunga kuti mushandisi asiya munda usina chinhu.
- Marekodhi ehurumende anogona kupa kukanganisa uye kudzima ruzivo rwakabatana nevanhu vane surname iyi.
- Mamwe mabhanga ane Matambudziko ekugadzirisa matransaction evatengi vane surname iyi.
Izvi zvinoratidza kuti sarudzo yakapusa mukugadzira software inogona kupedzisira yabata vanhu muhupenyu chaihwo.
Mhosva chaidzo dzevakabatwa
Imwe yenyaya dzinozivikanwa kwazvo ndeye Nontra Null, mugadziri wefashoni aiva nezvinetso zvakakomba paaitsvaga vhiza rekuenda kuIndia. Kombuta yemumiriri yakaramba chikumbiro chake nekuti zita rake rekupedzisira rakadudzirwa seukoshi husina basa. Akangokwanisa kugadzirisa dambudziko rimwe zuva asati atiza.
Mumwe muenzaniso ndewe Jan Null, nyanzvi yezvemamiriro ekunze iyo, mumakore apfuura, yave ichinetseka kugadzira kubhuka mahotera uye kunyoresa pamawebhusaiti. Kuti udzivise matambudziko aya, wasarudza kushandura zita rako pamafomu, kuisa "J. Null» pachinzvimbo chezita rayo rakazara.
Kuti rezinesi ndiro yakakonzeresa sei mhirizhonga yekutonga
Mhosva yakanyanyisa yakaitika Joseph Tartaro, nyanzvi yekuchengetedza kombiyuta uyo, nokuda kwekunakidzwa, akakumbira a Yemunhu rezinesi plate ine izwi rekuti "NULL". Akakurumidza kuona kuti chisarudzo chake chaizova nemigumisiro isingakarirwi.
Kwemakore, Tartaro yakagamuchira Matikiti emigwagwa kubva kumatunhu akasiyana, pasina kutyora mutemo. Traffic masisitimu, kana achigadzirisa kukanganisa pasina muridzi akajeka, akapa faindi kuzita rake nekuti 'NULL' mumadhatabhesi inodudzirwa semunda usina chinhu.
Pasinei nekuedza kwake kugadzirisa dambudziko racho, zvikanganiso zvakaramba zviripo, uye yake Chaingogona kuita sarudzo yaive yekuchinja kunyoreswa kwemotokari yake..
Dambudziko iri ringagadziriswa sei?
Dambudziko rine surname 'Null' rine chekuita nemabatiro anoita makomputa data. Nyangwe Mamwe makambani akatora matanho kudzivirira izvi., inoramba iri drawback pamapuratifomu akawanda.
Mimwe mhinduro dzinogona kushandiswa dzinosanganisira:
- Ongorora masisitimu emakombuta kuona nekugadzirisa kusaturikirwa kwe 'Null'.
- Bvumira kutariswa kwemaoko kwezviitiko zvakakosha mumafomu kudzivirira kurambwa otomatiki.
- Gadzirisa dhatabhesi kubata surname semavara asina kukosha kwakakosha mukati mehurongwa.
Makambani akaita se Microsoft vakasarudza kudzivirira kushandiswa kwe 'null' mukuvandudza kwavo kutsva kuderedza zvikanganiso izvi. Nekudaro, zvichipihwa kushandiswa kwakanyanya kweizwi mukombuta, Kuchinja maitiro ese aripo ibasa rakaoma.
Nyaya yevanhu vanonzi 'Null' muenzaniso wakajeka wekuti software dhizaini inogona kukanganisa sei hupenyu hwevanhu. Nepo mhinduro dzakaita sekuchinja zvishoma surname mumarekodhi zvinogona kudzikisira mamwe matambudziko, Mhinduro chaiyo ndeyekuvandudza zvirongwa zvehurongwa kuitira kuti vazive nyaya idzi uye vadzivise kuunza zvikanganiso.
Ini ndiri anofarira tekinoroji akashandura zvaanofarira zve "geek" kuita basa. Ndapedza makore anopfuura gumi ehupenyu hwangu ndichishandisa tekinoroji yekucheka-kumucheto uye kutamba nemhando dzese dzezvirongwa kunze kwekuda kuziva. Iye zvino ndava nyanzvi mune zvekombiyuta uye mitambo yemavhidhiyo. Izvi zvinodaro nekuti kweanopfuura makore 10 ndanga ndichishanda kunyora kune akasiyana mawebhusaiti pane tekinoroji nemitambo yemavhidhiyo, ndichigadzira zvinyorwa zvinotsvaga kukupa ruzivo rwaunoda mumutauro unonzwisisika nemunhu wese.
Kana iwe uine chero mibvunzo, ruzivo rwangu rwunobva kune zvese zvine chekuita neWindows inoshanda sisitimu pamwe ne Android yenharembozha. Uye kuzvipira kwangu kuri kwauri, ndinogara ndakagadzirira kushandisa maminetsi mashoma uye kukubatsira kugadzirisa chero mibvunzo yaungave unayo munyika ino yeinternet.