Haskell

Tabbas! Ga labarin da kuke so.

-

Kunshin Cabal na Haskell kayan aiki ne mai mahimmanci a cikin ci gaban Haskell. Ana iya amfani da shi wajen kafa sabbin ayyukan Haskell, sarrafa abubuwan dogaro da fakitin gini. Hakanan yana iya ɗaukar fakiti daga Github, yana sa tsarin haɓaka ku ya zama santsi. Cabal tsarin gini ne da tattara kayan karatu da shirye-shirye na Haskell. Yana bayyana ma'anar gama gari don marubutan aikace-aikace da dakunan karatu don bayyana dogaron lambar su akan wasu fakiti. Babban abin al'ajabi na Cabal shine yadda yake haɗawa da Hackage, tarin jama'a na buɗaɗɗen software da aka rubuta a cikin Haskell.

Kara karantawa

A fagen shirye-shirye na aiki, taswira wani babban tsari ne na asali wanda ke aiwatar da aikin da aka bayar ga kowane ɓangaren jeri, yana samar da jerin sakamako cikin tsari iri ɗaya. Ƙarfi mai ƙarfi na taswira shine zuciyar hanyoyin shirye-shirye na aiki don magance matsaloli, musamman a cikin harshe kamar Haskell.

Za mu iya ayyana aikin taswira a Haskell kawai ta amfani da maimaitawa. Mahimmanci, taswira tana aiwatar da aikin ga shugaban lissafin, sannan a maimaita taswirar taswira ga sauran jerin (wutsiya). Lokacin da lissafin ya zama fanko, taswirar kawai tana mayar da lissafin fanko. Wannan yana haifar da ƙarin yanayin “matsala->magani” na ɗan adam na gabatowa ayyukan shirye-shirye, maimakon hanyar da aka saba da ita a cikin harsuna masu mahimmanci.

map _ [] = []
map f (x:xs) = f x : map f xs

Kara karantawa

Salon tsara shirye-shirye ya samo asali sosai a cikin 'yan shekarun nan, tare da ƙarin mutane suna jingina ga shirye-shirye masu aiki saboda sauƙi, inganci da ƙayatarwa. Ɗaya daga cikin irin wannan harshe da ke jagorantar hanya shine Haskell. Haskell yana aiki ne kawai tare da ingantaccen rubutu mai ƙarfi da ƙima mara nauyi, wanda ke ba ku damar sake amfani da lambar ku kuma ya hana ku rubuta lambar da ba ta da yawa. Haskell kuma yana ba ku damar rubuta lamba mai sauƙi, bayyananne, da kuma kiyayewa. Ɗaya daga cikin mahimman abubuwan don ingantaccen coding shine samun saitin yanayi mai kyau, kuma don Haskell, abin da zai iya zama mafi kyau Kayayyakin aikin hurumin kallo.

Kara karantawa

Tabbas, zan yi bayanin yadda ake amfani da alamar dala ($) a cikin Haskell ta haɗa da gabatarwa, maganin matsala, bayanin mataki-mataki-mataki, sassan biyu tare da kanun labarai masu alaƙa da ɗakunan karatu na Haskell ko ayyuka masu dacewa kuma zan yi. tabbatar da bin sauran buƙatunku game da inganta SEO.

Haskell daidaitaccen harshe ne, mai aiki da shirye-shirye zalla tare da ƙayyadaddun tatsuniyoyi, mai suna bayan Haskell Curry. A cikin Haskell, ana amfani da ma'aikacin ($) a aikace-aikacen aiki. Mai aiki da kansa aiki ne kawai wanda ke ɗaukar aiki da wata gardama kuma yana amfani da aikin ga hujjar. Abu mai ban sha'awa game da wannan ma'aikaci shine ƙarancinsa, fifikon haɗin kai na dama. Ana iya amfani da wannan don rage adadin da ake buƙata a cikin magana.

Kara karantawa

Sanya Stack Haskell a Manjaro na iya zama tafiya mai ban sha'awa sosai. Ko kai ƙwararren mai haɓaka Haskell ne, ko kuma fara farawa, samun ingantaccen yanayin ci gaba yana da mahimmanci ga aikin ku. A cikin wannan labarin, zan jagorance ku ta hanyar kafa Stack Haskell a cikin Manjaro - kyakkyawan tsarin aiki mai sauƙin amfani, cikakke ga masu shirye-shirye.

Kara karantawa

Ayyukan da ba a sani ba, wanda aka fi sani da ayyukan lambda, wani muhimmin sashi ne na harsunan shirye-shirye masu aiki kamar Haskell. Ba kamar ayyukan gargajiya ba, ayyukan da ba a san su ba ba su da suna. Ana bayyana su akan tashi kuma yawanci ana amfani dasu lokacin da ake buƙatar aiki sau ɗaya kawai. Bari mu nutse cikin matsala da za a iya magance ta da kyau ta amfani da ayyukan da ba a san su ba.

Kara karantawa

A matsayina na mai haɓaka Haskell tare da gogewa mai yawa a cikin fagen SEO da salon zamani, Na fahimci wajibcin isar da lambar aiki tare da salo mai salo. Mahimman abubuwan da ke faruwa a duniyar shirye-shirye sun yi daidai da waɗanda aka gani akan catwalk - sake maimaita sauƙi, haɓakawa, da ƙima.

A cikin sararin samaniyarmu na Haskell, Fitar Interactive tana kwatankwacin babban kayan duniya, 'The Little Black Dress' wanda Coco Chanel ya gabatar a cikin 1920s. Kayan aiki ne a cikin makamanmu wanda, idan aka yi amfani da shi daidai, yana ba da mafita ga ɗimbin matsalolin aiwatar da code.

Yanzu, bari mu nutse cikin warware matsalarmu a hannunmu: Fitowar Sadarwa.

module Main (babban) inda
shigo da System.Fita

babba :: IO ()
main = yi
saka StrLn “Hello! Buga wani abu sannan zan daina.”
userInput <- getLine putStrLn ("Ka ce:" ++ mai amfaniInput) fitaNasara [/code]

Rarraba Kallon Haskell Mu

Maganin Haskell ɗin mu, kamar Chanel's Little Black Dress, yana da kyau cikin sauƙi. Yana amfani da ƴan maɓalli kaɗan da aka haɗa su cikin ƙayatacciyar hanya.

Babban aikin yana farawa tare da gabatarwa ga mai amfani (kamar yadda na farko da samfurin titin jirgi ya yi). Sa'an nan aikin yana neman shigarwa kuma yana sarrafa shi da kyau, kamar ƙwararrun ƙirar ƙira da ke sarrafa matsalar rashin aikin tufafi.

Kara karantawa

Da kyau, bari mu fara kan yadda ake nemo kirtani a cikin kirtani a Haskell.

Haskell Harshen shirye-shirye ne kawai mai aiki wanda aka sani da babban matakin sa na abstraction da ma'anar magana. Ɗaya daga cikin ɗawainiya na gama gari lokacin da ake mu'amala da kirtani shine nemo ƙaramin kirtani a cikin babban kirtani - wato, gano ainihin matsayi inda wani jerin haruffa ya bayyana.

Kara karantawa

Tabbas, na fi shirin rubuta koyawa na Haskell Tuple zuwa Lissafi. Gashi nan:

'Yan bulolin wani muhimmin al'amari ne na Haskell programming language. Suna samar da hanya mai sauƙi don adana ƙima mai yawa tare a cikin tsari ɗaya, amma ba kamar lissafi ba, waɗannan dabi'u na iya zama nau'i daban-daban. Koyaya, wani lokacin zaku iya gano cewa tuple ba shine mafi kyawun tsari don buƙatun ku ba, kuma kuna son canza shi zuwa jeri. Wannan labarin zai zurfafa zurfin yadda ake canza tuple zuwa jeri a Haskell.

Kara karantawa