JavaScript: lophimba mlandu - options kusankha

chifukwa yofanana, makhalidwe a mwina kwambiri. Kapena mosinthanitsa: mtengo adzakhala zifukwa zingapo pakuwonekera kwake. Mulimonsemo, malingana ndi zinthu zina ayenera kutenga njira imodzi yokha, kapena mosinthanitsa.

Ngakhale chigamulo mwina zingapo zimene mungachite kuti cholinga chilichonse adzatsogolera njira imodzi yokha, koma njira zambiri angapo, ndipo tiyenera kusankha.

Classic makonzedwe mawu ngati (chikhalidwe) {1 aligorivimu, ngati chikhalidwe choona} wina {2 aligorivimu, ngati chikhalidwe ndi zabodza} amapereka zosankha ziŵiri zokha. Koma ngakhale kovuta losavuta kwenikweni nthawi zonse amapereka zambiri zimene mungachite.

A yosavuta "palibe munthu", koma chikhalidwe chimodzi

JavaScript Design, kusinthana mlandu = makhalidwe angapo mikhalidwe. Akhoza zopezera ntchito zofanana Ngati osakaniza ndi woyendetsa. Komabe, Mosakayika, chimake choyamba syntactically ndi semantically olondola. Komanso lingaliro ofunda pa Baibulo yachiwiri zochuluka luso Wolemba Mapulogalamu:

Pali kuphatikiza ngati (...) {...} wina {...} ndi kuyesa {...} cath (...) {...} lili pamwamba AJAX-kuwombola ndondomeko mu aligorivimu ndi. Yankho processing imagwiridwa akonzedwa ofanana mawu makonzedwe.

JavaScript lophimba mlandu: chitsanzo

Waukulu kusiyana kunja kusankha njira kwa chikhalidwe chimodzi: simungathe kulemba awiri, ndi midadada ochepa malamulo executable. Adzakhululukidwa anaphedwa kamodzi kapena ochepa.

Kapangidwe J avaScript lophimba choncho amalola kupereka kuchuluka kwa ma aligorivimu malingana phindu la variable kapena mawu. Nkofunika kukumbukira kuti kusankha olondola a aligorivimu adzapangidwa pa machesi enieni mu mawu a mtengo lophimba () ndi mtengo wa zimene zinanenedwa mlanduwo. The "1" ndipo chiwerengero 1 - mtundu kutembenuka sakhala apa sali yemweyo.

Kuchita zigawo angapo

Mbali khalidwe la kamangidwe kusankha J avaScript lophimba mlandu ndi pakalibe m'mabokosi midadada - {...} apatsidwa kufotokoza yekha chiyambi ndi mapeto a thupi woyendetsa. Chigawo chilichonse kumathera mlandu yopuma woyendetsa, kumene kungakhale ayi.

Mu zitsanzo analilumpha yopuma woyamba mlandu gawo. Yankho kumanzere adzakupatsani zotsatira Variant2, chifukwa apa kuti akuyamba kuphedwa, ndi chimake cha kumanja adzalandiridwa Variant1Variant2, ngati icho chidzachitidwa woyamba, koma ziribe mphamvu ndi chikhalidwe chachiwiri, ndipo pambali, palibe chimene chingawalepheretse kudzapereka mawu a chigawo choyamba, ndiye chachiwiri, pakati pawo palibe yopuma woyendetsa, koma kawiri JavaScript lophimba mlandu sakutero. Tikumbukenso kuti kusintha mu iCond variable mu dongosolo thupi sapereka mphamvu iliyonse.

Code zenizeni ndi choonadi cha vuto

JavaScript - chinenero cha lalikulu, mofulumira, achidule ndi zomveka ndi malembedwe ntchito. JavaScript kapangidwe lophimba mlandu wakuchita mwangwiro, kulola kufotokoza yomveka ndi yolondola mitundu anakhumba kusankhapo pa zinthu zenizeni.

Wothandizira kusankha akhoza anaikapo mu mzake. Pankhani ya chigawo kungakhale makonzedwe mawu, zingwe zopota, nyumba ina. Sitiyenera kunyalanyaza kuchuluka kwa zosintha. Monga ntchito kwina kulikonse anafotokoza lonse.

Komabe, sayenera nkhanza JavaScript. Sinthani mlandu - waukulu chida nthambi, koma osati mu mkulu-buku malamulo yam'manja. The abwino ndiponso zinchito osiyanasiyana options kusamala, kovuta kuti tidzasandulika ina.

Vuto lenileni sadzamva kuima, ndipo ngati simuchita mu kusintha nkhani mu njira ya lingaliro ake, kuti kuyambira akamaliza ntchito, mu masiku yoyamba inayamba kulenga gwero adzakhala zolakwika imaonekera ndipo zosiyidwa. vuto, ndithudi, adzapita patsogolo, ndi malo adzakhala ndi kutsirizidwa.

Mmene zimenezi, sangathe waukulu JavaScript lophimba mlandu zichokela ku kukula kwake ndi kuvuta. Ngati inu Musaononge, mungathe kukwaniritsa kupanga zosankha yaying'ono ndi zazing'ono.

Ulili + njira = latsopano wozungulira kayendedwe

Molondola anakonza vuto ukufanana yankho. Ngakhale vuto, ndi tanthauzo lokha sikungathetse chirichonse, ndi mawonekedwe.

chikhalidwe ntchito kulikonse (payekha ntchito zing'onozing'ono). zikhalidwe za kuphedwa = kuphedwa kwa ena code. Ntchito pa JavaScript lophimba nkhani - ndi mafashoni mawu, ndi kufunika bwino. Kuyambira pamene anapanga mu zinenero zonse, chifukwa ndi losavuta ndi yabwino.

Pamene mwabadwanso "Lisp" ndi "Mawu Oyamba" ofanana ndi zinenero zawo mapulogalamu. Panali nkhondo pa ntchito kusintha ndi zolemba. Ine ndikuyesera kuti wamakhalidwe kusanja zinchito kalembedwe mapulogalamu kulemba. Lero, mapulogalamu chachikulu nsangala amalimbikitsa chinthu wokonda malingaliro.

Komabe, mpaka tsopano mu ntchito masiku ano wawo mfundo zofunika makonzedwe. Koma akamanena za malingaliro amakono chakuti zinthu okha anapereka zinthu ndi kupeza njira. Ndipotu, chinthu - m'ndandanda wa malembedwe ndi manenedwe.