M'ndandanda wazopezekamo[Bisani][Show]
- 1. Konzani Chidziŵitso Chanu Choyambirira
- 2. Gwiritsani ntchito njira yolunjika pa chinthu
- 3. Gwiritsani ntchito ntchito ngakhale zazing'ono
- 4. M'malo mwa ==, gwiritsani ntchito ===
- 5. Gwiritsani ntchito JSLint
- 6. Zolemba ziyenera kuikidwa pansi pa tsamba lanu
- 7. Njira Yachangu Yopangira Chingwe
- 8. Onjezani ndemanga ku code yanu
- 9. Gwiritsani ntchito Template Literals
- 10. Ma Iterators ndi ... a Lupu
- 11. Gwiritsani ntchito {} M'malo mwa Chinthu chatsopano ()
- 12. Ganizirani kuyika let and const mu code yanu
- 13. eval() Si Lingaliro Labwino
- 14. The Spread Operator imabwera bwino
- 15. dikirani ndi async
- 16. Gwiritsani ntchito njira yophatikiza () mu Javascript
- 17. Chotsani zinthu kuchokera pamndandanda pogwiritsa ntchito Splice
- 18. Gwiritsani Ntchito Ntchito ya Muvi
- 19. Ndi Kuwononga, mutha kugawa mwachangu mikhalidwe yosinthika
- 20. Pangani ntchito zingapo
- Kutsiliza
Ngati mudakhalapo ndi chidwi ndi chitukuko cha intaneti, mwina mwakumanapo ndi JavaScript. Chilankhulo chokhazikika pazinthu ndi JavaScript. Madivelopa amachigwiritsa ntchito kupanga masamba a kasitomala kumbali (kutsogolo) kukhala kwamphamvu komanso kolumikizana.
Amagwiritsidwanso ntchito popanga masamba ndi mapulogalamu apaintaneti, okhala ndi HTML ndi CSS. Palibe tsamba pa intaneti masiku ano lomwe lilibe JavaScript code. Yakhala gawo losasinthika la ntchito ya wopanga.
Zoonadi, ikuchulukirachulukira. Ngakhale JavaScript imadziwika bwino kuti imagwira ntchito pamasamba, imagwiritsidwanso ntchito m'malo omwe si a JavaScript. Node.js, Apache Couch-DB, ndi Adobe Acrobat ndi zitsanzo za matekinolojewa. Pogwiritsa ntchito JavaScript, asakatuli ambiri amakono amakhala ndi makina opangira JavaScript opangidwa mkati. Ngati mukufuna kukhala wochita bwino pa intaneti, muyenera kuthana ndi JavaScript.
Muyenera kuchita lero kapena mawa. Bwanji osaphunzira JavaScript pasadakhale kuti mukhale okonzeka nthawi ikadzakwana?
Izi ndi zomwe muphunzira mu gawoli. Imakufotokozerani momwe mungakhalire patsogolo paopanga anzanu popukuta JavaScript yanu.
Tiyeni tiyambe!
1. Konzani Chidziŵitso Chanu Choyambirira
Ndiyamba ndi lingaliro lofunikira komanso mawu omwe mudamvapo kuyambira muli mwana. Phunzirani zoyambira ndikuzigwiritsa ntchito. Nthawi zambiri, mudzakhala mukugwiritsa ntchito logic ndi coding, koma mudzayiwala kuti pali kale ntchito yopangira izo, monga kudula mndandanda. Mukayendetsa JavaScript code, mutha kupeza cholakwika, ndipo chifukwa chake, zina zambiri zimasiya kugwira ntchito.
Izi zitha kuchitika chifukwa cha m'matumbo amodzi kapena makoma opindika. Zinthu izi zimachitika chifukwa cha kusamvetsetsa zoyambira. Nthawi zambiri mu pulogalamu imodzi, zoyambira zoyambira monga za, zomwe, kapena kuchita zikugwiritsidwa ntchito. Loops ndi imodzi mwazinthu zofunika kwambiri pakukonza mapulogalamu.
Ndizovuta kwambiri kulemba ma code komanso kukhala ndi mwayi wogwira ntchito kukampani ngati simukudziwa za looping ndi zina zofunika. Kukambirana pazikhazikitso zanu ndikofunikira chifukwa kumapereka maziko olimba opangira malingaliro ndi mbiri ya yankho.
2. Gwiritsani ntchito njira yolunjika pa chinthu
Njira yoyendetsera zinthu ndiyo njira yodziwika bwino kwambiri yopangira mapulogalamu masiku ano. Njira yotsata zinthu, yomwe idayamba ndi C ++, yakula kwambiri kuyambira pamenepo. Masiku ano, mapulogalamu okhawo omwe amagwiritsidwa ntchito popanga zilankhulo zazikuluzikulu amagwiritsidwa ntchito. Njira yolunjika pa chinthu ndi yomwe imayang'ana pa chinthu china.
Kenako chinthucho chimakhala chofunikira kwambiri. Chinthuchi chimagwiritsidwa ntchito kuwonjezera mawonekedwe ndi ntchito patsamba ngati maziko. Mukhozanso kugwiritsa ntchito njira yachikhalidwe yopangira ma code kuchokera pamwamba mpaka pansi popanda ntchito kapena zinthu. Izi ndizambiri kwambiri ndipo siziyenera kuyesedwa. Popanga ma code, tiyenera kugwiritsa ntchito njira yogwira ntchito, ndipo ngati tigwiritsa ntchito, tiyenera kugwiritsa ntchito zinthu.
Chifukwa chake, poyambira, yesetsani kutembenuza khodi yanu yayikulu kukhala kachidindo kolunjika ku chinthu, ndipo nthawi zonse lembani kachidindo kanu motsatira chinthu. Mukawerenga ma code a anthu ena, mudzakhala mukuyang'ana nthawi zonse njira zogwiritsira ntchito zinthu. Ngati mukufuna kudziwa JavaScript, ndibwino kuti muyikepo.
3. Gwiritsani ntchito ntchito ngakhale zazing'ono
Kupanga mapulogalamu ndi njira yogwira ntchito ndi njira yabwino kwambiri. Chifukwa chiyani? Imalekanitsa mapulogalamu anu kukhala ma module omwe amagwira ntchito limodzi koma amakhalabe osiyana. Ndiroleni ndikupatseni chitsanzo kuti ndikuthandizeni kumvetsa.
Root Mean Square ya manambala onse akhoza kuwerengedwa pogwiritsa ntchito ntchito. Kuti muchite izi, muyenera kuchulukitsa manambala, kuwerengera tanthauzo lake, ndiyeno kuwerengera muzu wa sikweya wa tanthauzo. Pali magawo atatu munjirayi. Chifukwa chake, titha kugwiritsa ntchito ntchito zitatu. Koma, monga mukuwonera, ntchito zonsezi ndizolumikizana. Zotsatira za chimodzi zimatumizidwa kwa wina, ndipo timalandira zotsatira zomaliza.
Tiyeni tiyerekeze kuti m'malo mwa ntchito zitatu, mumangofunika imodzi kuti muwerenge RMS kutengera zinthu zingapo. Yankho lomaliza, monga mukuwonera, ndilolakwika. Zidzakhala zovuta kwa inu kudziwa chomwe chinalakwika pamwambo waukulu chonchi pakadali pano.
Kukhala ndi zing'onozing'ono zitatu, kumbali ina, kudzakuthandizani kusanthula mofulumira. Chifukwa chake, ngakhale magwiridwe antchito ali ochepa, agwiritseni ntchito kuti afotokozere ma code modules. Njira iyi ikuthandizani kukhala katswiri wa JavaScript ngati matsenga.
Tsopano, tiyeni tiwone malangizo ena a JavaScript.
4. M'malo mwa ==, gwiritsani ntchito ===
Mu JavaScript, pali mitundu iwiri ya ogwira ntchito ofanana: ogwira ntchito ofanana mwamphamvu === ndi !==, ndi osagwirizana mokhazikika == ndi !=. Poyerekeza, zimawonedwa ngati njira yabwino kwambiri yogwiritsira ntchito zofanana ndendende nthawi zonse. Mukamagwira ntchito ndi == ndi !=, mumakumana ndi zovuta mukamachita ndi mitundu yosiyana.
Pamene mitundu ya zikhalidwe zomwe mukuzifananitsa ndizosiyana, osagwiritsa ntchito mwamphamvu amayesa kukakamiza zikhalidwe zawo, zomwe zitha kubweretsa zotsatira zosayembekezereka.
5. Gwiritsani ntchito JSLint
Douglas Crockford adapanga JSLint, debugger. Ingoyikani script yanu m'bokosi, ndipo idzayang'ana mwachangu kuti muwone zolakwika kapena zolakwika zilizonse.
JSLint imayang'ana fayilo yochokera ku JavaScript. Vuto likapezeka, limatumiza uthenga wofotokoza za vutolo komanso malo oyerekeza omwe amachokera. Sikuti nthawi zonse vuto silikhala lolakwika, ngakhale nthawi zambiri zimakhala choncho.
JSLint imayang'ana zonse zamakhalidwe ndi machitidwe. Izi sizikutanthauza kuti pulogalamu yanu ndi yolondola. Zimangowonjezera maso ena kuti athandizire kuzindikira zovuta. Musanasaine script, yesani ku JSLint kuti muwonetsetse kuti simunalakwe.
6. Zolemba ziyenera kuikidwa pansi pa tsamba lanu
Cholinga chachikulu cha wogwiritsa ntchito ndikuti tsamba lizitsegula mwachangu momwe angathere. Msakatuli sangathe kupitiriza kukweza script mpaka fayilo yonse itakwezedwa. Zotsatira zake, wogwiritsa ntchitoyo ayenera kudikira nthawi yayitali kuti awone kupita patsogolo kulikonse.
Ngati muli ndi mafayilo a JS omwe amangogwiritsidwa ntchito popereka magwiridwe antchito (mwachitsanzo, batani ikangodina), ikani pansi pa tsambalo, pomwe chizindikiro cha thupi chisanatseke. Uwu ndiye mchitidwe wabwino kwambiri.
7. Njira Yachangu Yopangira Chingwe
Mukafuna kuzungulira gulu kapena chinthu, musagwiritse ntchito trusty yanu nthawi zonse polemba mawu. Gwiritsani ntchito malingaliro anu kuti mupeze yankho lachangu pantchito yomwe muli nayo. Sindikubweretserani manambala; muyenera kungondikhulupirira (kapena kudziyesa nokha).
Iyi ndiye njira yofulumira kwambiri mpaka pano.
8. Onjezani ndemanga ku code yanu
Zitha kuwoneka zopanda pake poyamba, koma ndikhulupirireni ndikanena kuti muyenera kuyankha pamakhodi anu pafupipafupi momwe mungathere. Bwanji ngati mutabwereranso ku polojekitiyi patapita miyezi ingapo ndipo simungakumbukire momwe munaganizira poyamba?
Nanga bwanji ngati khodi yanu ikuyenera kusinthidwa ndi mmodzi wa ogwira nawo ntchito? Magawo ofunikira a khodi yanu akuyenera kuyankhidwa nthawi zonse.
9. Gwiritsani ntchito Template Literals
Zoletsa za zingwe zopangidwa ndi mawu awiri kapena amodzi ndizochuluka. Kuti mugwire nawo ntchito mosavuta, mutha kusankha kusintha zina mwa zingwe zanu ndi zilembo zama template.
Chilembo cha backtick (') chimagwiritsidwa ntchito popanga zilembo zama template, zomwe zili ndi zabwino zingapo. Mutha kuzigwiritsa ntchito posungira mawu kapena kupanga zingwe zamizeremizere.
Monga mukuwonera, mosiyana ndi chingwe chokhazikika chomwe chimapangidwa ndi mawu amodzi kapena awiri, sitinayenera kulowa ndikutuluka mu template yathu mobwerezabwereza. Izi zimachepetsa mwayi wolemba zolakwika komanso kutilola kulemba khodi yoyeretsa.
10. Ma Iterators ndi ... a Lupu
Iterators ndi zinthu za mu JavaScript zomwe zimagwiritsa ntchito njira yotsatira () kubweza chinthu chomwe chimasunga mtengo wotsatira motsatizana komanso zoona kapena zabodza kutengera ngati pali zina zomwe zatsala. Izi zikutanthauza kuti ngati mugwiritsa ntchito protocol ya iterator, mutha kupanga zinthu zanu za iterator.
Pali ena omwe adamangidwa mu JavaScript, monga String, Array, Map, ndi zina zotero. Mutha kugwiritsa ntchito ... kwa malupu kuti muwadutse. Poyerekeza ndi wamba pa malupu, izi ndizachidule komanso sizikhala ndi zolakwika. Sitiyenera kutsatira utali wonse wa gulu kapena index yomwe ilipo pogwiritsira ntchito…ya loop. Mukamapanga malupu okhala zisa, izi zitha kuthandiza kuti code ikhale yosavuta.
11. Gwiritsani ntchito {} M'malo mwa Chinthu chatsopano ()
Mu JavaScript, mutha kupanga zinthu m'njira zosiyanasiyana. Kugwiritsa ntchito womanga watsopano, monga momwe zasonyezedwera, ndi njira yodziwika bwino. Njira imeneyi, kumbali ina, imadziwika kuti "kuchita molakwika."
Sizowononga, koma ndi mawu ochepa komanso apadera. Ndikupangira m'malo mwake kugwiritsa ntchito njira yeniyeni ya chinthu.
12. Ganizirani kuyika let and const mu code yanu
Titha kugwiritsa ntchito mawu osakira kuti tipange zosintha zakumalo zomwe zimayikidwa pa block yawo. Titha kugwiritsa ntchito mawu achinsinsi a const kuti tipange zosintha zapamalo zomwe sizingasinthidwe.
Mukamalengeza zosinthika, muyenera kuganizira kugwiritsa ntchito mawu osakira ndi const ngati kuli kofunikira. Kumbukirani kuti mawu osakira a const amalepheretsa kugawanso ntchito. Izo sizimapangitsa kusinthika kusasinthika, mwina.
13. eval() Si Lingaliro Labwino
Njira ya eval(), kwa omwe sadziwa, imatilola kuti tifikire ku compiler ya JavaScript. Kwenikweni, titha kugwiritsa ntchito eval kupanga zotsatira za chingwe popereka ngati cholowetsa ().
Izi sizingochepetsako script yanu, komanso zimaperekanso chitetezo chofunikira chifukwa zimapereka mphamvu zochulukirapo. Pewani izo zivute zitani!
14. The Spread Operator imabwera bwino
Kodi mudafunikapo kusamutsa zinthu zonse mumndandanda ngati zinthu zina kupita ku ntchito ina, kapena muyenera kuyika zikhalidwe zonse kuchokera pamndandanda umodzi kupita ku wina? Izi ndi zomwe wogwiritsa ntchito kufalitsa (…) amalola kuti tikwaniritse. Nachi fanizo.
15. dikirani ndi async
Pangani ma asynchronous ntchito pogwiritsa ntchito mawu osakira async, omwe nthawi zonse amabweretsa lonjezo, momveka bwino kapena mosabisa.
Mawu ofunikira omwe akudikirira atha kugwiritsidwa ntchito ngati asynchronous kuti ayimitse kukwaniritsidwa mpaka kukwaniritsidwa kwa malonjezano obwerera kumalizidwa. Kunja kwa ntchito yanu ya async, code idzapitiriza kuyenda bwino.
16. Gwiritsani ntchito njira yophatikiza () mu Javascript
Mu JavaScript, ntchito yophatikiza () imatsimikizira ngati chingwe chili ndi zilembo zomwe zaperekedwa kapena ngati gulu lili ndi chinthu chomwe chatchulidwa.
Njirayi imabwereranso ngati chingwe kapena chinthu chapezeka; apo ayi, amabwerera zabodza. Ndikoyenera kunena kuti Strings ili () ntchito imakhala yovuta. Ngati mukufuna kufananitsa zingwe posatengera mtundu wake, ingotsitsani mawu omwe mukufuna.
17. Chotsani zinthu kuchokera pamndandanda pogwiritsa ntchito Splice
Kuchotsa chinthu pagulu, ndawonapo opanga akugwiritsa ntchito kufufuta. Izi ndi zolakwika chifukwa, m'malo mochotsa chinthucho, njira yochotserayo imalowa m'malo mwake ndi yosadziwika.
Njira yosavuta yochotsera chinthu kuchokera pamndandanda kutengera mtengo wake mu JavaScript ndikugwiritsa ntchito indexOf() ntchito kuti mupeze nambala yamtengowo pamndandanda, kenako chotsani mtengowo ndi splice() njira.
18. Gwiritsani Ntchito Ntchito ya Muvi
Ntchito za mivi ndi chinthu china chofunikira chomwe changowonjezedwa ku JavaScript.
Iwo ali ndi boti katundu ubwino. Poyamba, amapanga magawo a JavaScript kukhala owoneka bwino komanso osavuta kulemba. Komabe, kugwiritsa ntchito mivi kumapangitsa izi kukhala zomveka komanso zazifupi.
19. Ndi Kuwononga, mutha kugawa mwachangu mikhalidwe yosinthika
Kumayambiriro kwa positi iyi, taphunzira za wofalitsa ku JavaScript. Kuwononga kumafanana ndi kuwononga chifukwa kumamasulanso deta yomwe ili mkati mwamagulu.
Kusiyanitsa ndikuti zikhalidwe zosapakidwazi zitha kuperekedwa kumitundu yosiyanasiyana. Mawuwa ndi ofanana ndi a [] njira yachidule popanga mndandanda. Mabulaketi, komabe, amaikidwa kumanzere kwa woyendetsa ntchito nthawi ino. Nachi fanizo.
20. Pangani ntchito zingapo
Talente iliyonse imafunikira kuyeserera kosasintha, chifukwa chake yesani kupanga ma projekiti osiyanasiyana kuti muwongolere luso lanu ndikupeza ukadaulo wamapulogalamu osiyanasiyana.
Mukugwira ntchito pama projekiti, mukumana ndi zovuta zingapo ndi zolakwika, zomwe zingakupatseni ukadaulo wofunikira. Chifukwa chake yesani kubwera ndi mapulojekiti, ndipo pali malingaliro ndi zitsanzo zambiri pa intaneti kuti zikuthandizeni. Pitirizani kupanga code, ndipo luso lanu lidzakula.
Kutsiliza
Zingakhale zovuta kuphunzira chinenero cha pakompyuta monga JavaScript. Ngati mukufunadi kukhala wolemba mapulogalamu abwino ndikupeza ntchito yanu yoyamba, ndiye kuti njira zophunzirira za JavaScript zingakuthandizeni kufulumizitsa maphunziro anu.
Onetsetsani kuti mumagwiritsa ntchito ma codec pafupipafupi, kulemba manotsi mukamaphunzira zatsopano, ndikugwiritsa ntchito zida zonse zomwe mungapeze. Koposa zonse, tulukani kumeneko ndikuyamba kukopera mukamasangalala.
Siyani Mumakonda