{"id":31178,"date":"2023-09-26T10:08:42","date_gmt":"2023-09-26T08:08:42","guid":{"rendered":"https:\/\/www.software-developer-india.com\/hur-man-skriver-underhallbar-programvara\/"},"modified":"2023-12-15T10:32:28","modified_gmt":"2023-12-15T08:32:28","slug":"hur-man-skriver-underhallbar-programvara","status":"publish","type":"post","link":"https:\/\/www.software-developer-india.com\/sv\/hur-man-skriver-underhallbar-programvara\/","title":{"rendered":"Hur man skriver underh\u00e5llbar programvara"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Hur man skriver underh\u00e5llbar programvara<\/h2>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/www.software-developer-india.com\/wp-content\/uploads\/2023\/09\/Creating-Maintainable-Code.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"575\" height=\"250\" src=\"https:\/\/www.software-developer-india.com\/wp-content\/uploads\/2023\/09\/Creating-Maintainable-Code.jpg\" alt=\"\" class=\"wp-image-31138\" srcset=\"https:\/\/www.software-developer-india.com\/wp-content\/uploads\/2023\/09\/Creating-Maintainable-Code.jpg 575w, https:\/\/www.software-developer-india.com\/wp-content\/uploads\/2023\/09\/Creating-Maintainable-Code-300x130.jpg 300w\" sizes=\"auto, (max-width: 575px) 100vw, 575px\" \/><\/a><\/figure>\n<\/div>\n<div class=\"wp-block-group wplogout-table-of-contents\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wplogout-toc-heading wp-block-paragraph\"><strong>Inneh\u00e5llsf\u00f6rteckning:<\/strong><\/p>\n<\/div><\/div>\n\n\n\n<ul class=\"wplogout-toc-contents wp-block-list\">\n<li><strong><a href=\"#-introduction-\" title=\"Introduktion\">Introduktion<\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"#-importance-of-having-maintainable-code-\" title=\"Vikten av att ha underh&#xE5;llbar kod\">Vikten av att ha underh\u00e5llbar kod<\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"#-how-do-you-measure-code-quality-\" title=\"Hur m&#xE4;ter man kodkvalitet?\">Hur m\u00e4ter man kodkvalitet?<\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"#-a-couple-of-code-metrics-you-can-use-\" title=\"Ett par kodm&#xE4;tningar som du kan anv&#xE4;nda&#xA0;\">Ett par kodm\u00e4tningar som du kan anv\u00e4nda  <\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"#-some-best-practices-for-writing-clean-and-maintainable-code-\" title=\"N&#xE5;gra b&#xE4;sta metoder f&#xF6;r att skriva ren och underh&#xE5;llbar kod\">N\u00e5gra b\u00e4sta metoder f\u00f6r att skriva ren och underh\u00e5llbar kod<\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"#-conclusion-\" title=\"Slutsats\">Slutsats<\/a><\/strong><\/li>\n<\/ul>\n<\/div><\/div>\n\n<h3 class=\"wp-block-heading\" id=\"-introduction-\"><strong>Introduktion<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">Det \u00e4r viktigt f\u00f6r f\u00f6retag att ha underh\u00e5llbar programvara eftersom kraven kan f\u00f6r\u00e4ndras \u00f6ver tiden, och programvaran m\u00e5ste kunna uppfylla dessa krav. Programvara som kan uppfylla de f\u00f6r\u00e4nderliga kraven p\u00e5 marknaden kommer alltid att f\u00f6rbli trendig och i bruk, och om inte, d\u00e5 kommer den att bli f\u00f6r\u00e5ldrad. Det \u00e4r d\u00e4rf\u00f6r som f\u00f6retag str\u00e4var efter att skapa programvara som kan underh\u00e5llas. Med underh\u00e5llbar programvara menar vi programvara som \u00e4r l\u00e4tt att f\u00f6rst\u00e5, modifiera och ut\u00f6ka.  <\/p>\n\n<h3 class=\"wp-block-heading\" id=\"-importance-of-having-maintainable-code-\"><strong>Vikten av att ha underh\u00e5llbar kod<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">H\u00e4r \u00e4r n\u00e5gra av de fr\u00e4msta anledningarna till att ha underh\u00e5llbar kod:<\/p>\n\n<h4 class=\"wp-block-heading\"><strong>1. Minska kostnaderna f\u00f6r mjukvaruutveckling<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">Du kanske blir f\u00f6rv\u00e5nad \u00f6ver att notera att underh\u00e5ll av programvara tar upp en stor del av de medel som avsatts f\u00f6r utveckling av programvara. Detta beror ofta p\u00e5 att m\u00e5nga utvecklare inte inser vikten av att skriva underh\u00e5llbar kod. Ofta skriver de stora koder, och de utvecklare som kommer efter dem m\u00e5ste brottas med koderna eftersom de har blivit ohanterliga.  <\/p>\n\n<h4 class=\"wp-block-heading\"><strong>2. B\u00e4ttre samarbete mellan teammedlemmarna<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">N\u00e4r koderna kan underh\u00e5llas blir samarbetet mellan teammedlemmarna b\u00e4ttre. De kommer att kunna arbeta snabbare och slutf\u00f6ra sina uppgifter mer framg\u00e5ngsrikt.  <\/p>\n\n<h4 class=\"wp-block-heading\"><strong><strong>3. Enkel skalbarhet<\/strong><\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">N\u00e4r koderna kan underh\u00e5llas bidrar det till \u00f6kad skalbarhet. kan du enkelt skala upp din app n\u00e4r efterfr\u00e5gan blir st\u00f6rre. Med koder av d\u00e5lig kvalitet \u00e4r skalbarhet kanske inte ett alternativ eftersom programvaran m\u00e5ste kastas ut.  <\/p>\n\n<h3 class=\"wp-block-heading\" id=\"-how-do-you-measure-code-quality-\"><strong>Hur m\u00e4ter man kodkvalitet?<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">Att m\u00e4ta h\u00f6gkvalitativ kod kan vara sv\u00e5rt f\u00f6r alla algoritmer som dimensionerar programvara. Detta beror p\u00e5 att det kan bli sv\u00e5rt att definiera r\u00e4tt kodkvalitet. Det b\u00e4sta s\u00e4ttet att m\u00e4ta kodkvaliteten \u00e4r att anv\u00e4nda en kvalitativ metod. Detta skulle hj\u00e4lpa utvecklarna att f\u00f6lja reglerna f\u00f6r att skriva kvalitetskod. Det skulle ocks\u00e5 bidra till att m\u00e4ta kodkvaliteten och analysera deras resultat p\u00e5 marknaden. H\u00e4r \u00e4r n\u00e5gra tips p\u00e5 hur du kan m\u00e4ta koden med hj\u00e4lp av en kvalitativ metod:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Kontroll av kodens tillf\u00f6rlitlighet<\/li>\n\n\n\n<li>Bed\u00f6mning av kodens portabilitet<\/li>\n\n\n\n<li>Fastst\u00e4lla kodens komplexitetsniv\u00e5er<\/li>\n\n\n\n<li>Kontroll av kodens \u00e5teranv\u00e4ndbarhetsniv\u00e5<\/li>\n\n\n\n<li>M\u00e4ta programmets testbarhetsniv\u00e5<\/li>\n\n\n\n<li>Anv\u00e4nda de senaste verktygen f\u00f6r kodkontroll<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\" id=\"-a-couple-of-code-metrics-you-can-use-\"><strong>Ett par kodm\u00e4tningar som du kan anv\u00e4nda  <\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">Det finns n\u00e5gra kodm\u00e5tt som du kan anv\u00e4nda f\u00f6r att avg\u00f6ra deras kodkvalitet. Kolla in dem:<\/p>\n\n<h4 class=\"wp-block-heading\"><strong><strong>1. M\u00e4tning av defekter<\/strong><\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">Genom defektm\u00e4tningarna kan du m\u00e4ta antalet defekter i koden och deras allvarlighetsgrad. Programmerarna och utvecklarna kommer att identifiera defekterna, i vilket skede de befinner sig, k\u00e4llan eller ursprungspunkten och hur m\u00e5nga defekter det r\u00f6r sig om.  <\/p>\n\n<h4 class=\"wp-block-heading\"><strong>2. Halsteads m\u00e5tt p\u00e5 komplexitet<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">Detta s\u00e4rskilda m\u00e5tt, som f\u00f6reslogs av Maurice Halstead, utv\u00e4rderar programvarans komplexitet. Den kommer att analysera tid f\u00f6r testning av k\u00e4llkod, storlek, sv\u00e5righetsgrad, fel, tid f\u00f6r testning av kod och ber\u00e4knad programl\u00e4ngd.<\/p>\n\n<h3 class=\"wp-block-heading\" id=\"-some-best-practices-for-writing-clean-and-maintainable-code-\"><strong>N\u00e5gra b\u00e4sta metoder f\u00f6r att skriva ren och underh\u00e5llbar kod<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">Nedan f\u00f6ljer n\u00e5gra enkla riktlinjer och principer som du kan anv\u00e4nda f\u00f6r att skriva kod av h\u00f6g kvalitet som \u00e4r l\u00e4tt att underh\u00e5lla. Att f\u00f6lja dessa principer skulle hj\u00e4lpa till med l\u00e4sbarhet, effektivitet och naturligtvis underh\u00e5ll av koden. Genom att f\u00f6lja dessa riktlinjer kan utvecklare spara tid och resurser i framtiden n\u00e4r de vill skala upp eller modifiera.  <\/p>\n\n<h4 class=\"wp-block-heading\"><strong>Sj\u00e4lvf\u00f6rklarande namn<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">Dina klasser, metoder och variabler m\u00e5ste ha l\u00e4ttf\u00f6rst\u00e5eliga namn. Namnet m\u00e5ste vara precis tillr\u00e4ckligt f\u00f6r att utvecklarna ska f\u00f6rst\u00e5 det, s\u00e5 att det inte uppst\u00e5r n\u00e5gra tvetydigheter eller f\u00f6rvirringar. Din kod kan enkelt l\u00e4sas av andra utvecklare, vilket sparar mycket tid f\u00f6r dem och minskar risken f\u00f6r fel och buggar.  <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Hur man skriver sj\u00e4lvf\u00f6rklarande namn<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Det \u00e4r enkelt. Just det:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Skriv beskrivande namn som beskriver vad koden g\u00f6r<\/li>\n\n\n\n<li>Undvik f\u00f6rkortningar, f\u00f6r vem vet, du kanske till och med gl\u00f6mmer vad det betyder<\/li>\n\n\n\n<li>Var konsekvent med namngivningen<\/li>\n\n\n\n<li>Undvik att anv\u00e4nda reserverade nyckelord som &#8221;om&#8221;, &#8221;annars&#8221;, &#8221;f\u00f6r&#8221; etc.  <\/li>\n\n\n\n<li>F\u00f6lj systemet med att skriva verb f\u00f6r funktioner och substantiv f\u00f6r klasser och variabler.<\/li>\n<\/ul>\n\n<h4 class=\"wp-block-heading\"><strong>F\u00f6lj standarder f\u00f6r kodning<\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">Med kodningsstandarder f\u00e5r dina koder ett enhetligt utseende som ser likadant ut, \u00e4ven om de har skrivits av olika ingenj\u00f6rer. Detta skulle naturligtvis underl\u00e4tta l\u00e4sbarheten och underh\u00e5llet samtidigt som kodernas komplexitet skulle minska.  <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Hur man f\u00f6ljer kodningsstandarder<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">N\u00e4r det finns etablerade kodningsstandarder kan du ha en stark kodningsgrund. H\u00e4r \u00e4r d\u00e4rf\u00f6r n\u00e5gra snabba riktlinjer:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Dela upp koderna i sm\u00e5, modul\u00e4ra funktioner och klasser<\/li>\n\n\n\n<li>Att ha en konsekvent kodningsstil, komplett med namnkonventioner, radl\u00e4ngder och indrag.<\/li>\n\n\n\n<li>L\u00e4gga till kommentarer och dokumentation s\u00e5 att utvecklarna f\u00f6rst\u00e5r hur programvarudelarna fungerar.<\/li>\n<\/ul>\n\n<h4 class=\"wp-block-heading\"><strong>KISS-metoden g\u00e4ller fortfarande<\/strong><\/h4>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/www.software-developer-india.com\/wp-content\/uploads\/2023\/09\/Software-Programming.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"575\" height=\"250\" src=\"https:\/\/www.software-developer-india.com\/wp-content\/uploads\/2023\/09\/Software-Programming.jpg\" alt=\"\" class=\"wp-image-31148\" srcset=\"https:\/\/www.software-developer-india.com\/wp-content\/uploads\/2023\/09\/Software-Programming.jpg 575w, https:\/\/www.software-developer-india.com\/wp-content\/uploads\/2023\/09\/Software-Programming-300x130.jpg 300w\" sizes=\"auto, (max-width: 575px) 100vw, 575px\" \/><\/a><\/figure>\n<\/div>\n<p class=\"wp-block-paragraph\">Enkla koder \u00e4r l\u00e4tta att underh\u00e5lla, s\u00e5 KISS (Keep it simple, stupid!). S\u00e5 l\u00e5t detta vara utvecklarens v\u00e4gledande princip. Se till att skriva koder d\u00e4r varje modul eller klass har ett enskilt ansvar. Mer \u00e4n s\u00e5 kan vara f\u00f6rvirrande.  <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Hur man uppr\u00e4tth\u00e5ller KISS-metoderna<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Det finns enkla tips som g\u00f6r koderna enkla. Kolla in dem:<\/p>\n\n<p class=\"wp-block-paragraph\">Planera koden<\/p>\n\n<ul class=\"wp-block-list\">\n<li>Skriv koden f\u00f6r m\u00e4nniskor<\/li>\n\n\n\n<li>Anv\u00e4nd meningsfulla namn och enkla algoritmer<\/li>\n\n\n\n<li>F\u00f6lj standarder f\u00f6r kodning<\/li>\n\n\n\n<li>Anv\u00e4nd enkla algoritmer s\u00e5 att koderna \u00e4r l\u00e4tta att f\u00f6rst\u00e5<\/li>\n\n\n\n<li>Undvik f\u00f6r tidig optimering genom att fokusera p\u00e5 att skriva rena, underh\u00e5llbara koder f\u00f6rst<\/li>\n\n\n\n<li>Refractor regelbundet f\u00f6r att h\u00e5lla den ren och enkel<\/li>\n\n\n\n<li>Testas regelbundet<\/li>\n<\/ul>\n\n<h4 class=\"wp-block-heading\"><strong>Modul\u00e4ra koder \u00e4r l\u00e4tt utbytbara  <\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">Modul\u00e4ra koder kan \u00e5teranv\u00e4ndas, s\u00e5 utvecklare m\u00e5ste se till att skriva koder som kan brytas ned i sm\u00e5, hanterbara komponenter. \u00c4ven om du inte \u00e4r den utvecklare som kommer att hantera koderna senare, kan den utvecklare som f\u00f6ljer efter spara tid genom att f\u00f6rst\u00e5 dem och \u00e5teranv\u00e4nda dem i de olika delarna av applikationen. Skriv d\u00e4rf\u00f6r koder med enskilda uppgifter s\u00e5 att de l\u00e4tt kan underh\u00e5llas.  <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Hur man skriver modul\u00e4ra koder<\/strong><\/p>\n\n<ul class=\"wp-block-list\">\n<li>Genom att anv\u00e4nda klasser och objekt kan koderna brytas ned i mindre komponenter<\/li>\n\n\n\n<li>Dela upp koderna i mindre funktioner med enskilda funktioner<\/li>\n\n\n\n<li>Undvik att uppfinna hjulet p\u00e5 nytt genom att v\u00e4lja bibliotek och ramverk som \u00e5teranv\u00e4nder koder<\/li>\n\n\n\n<li>Beroendeinjektioner hj\u00e4lper till att injicera beroenden i koden s\u00e5 att den blir l\u00e4tt att testa och underh\u00e5lla<\/li>\n<\/ul>\n\n<h4 class=\"wp-block-heading\"><strong>Versionskontrollsystem som Git  <\/strong><\/h4>\n\n<p class=\"wp-block-paragraph\">Med ett versionshanteringssystem som Git blir det enklare att samarbeta med teamet och h\u00e5lla koll p\u00e5 de \u00e4ndringar som g\u00f6rs.  <\/p>\n\n<p class=\"wp-block-paragraph\"><strong>Hur man skriver med hj\u00e4lp av versionshanteringssystem<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">Det finns n\u00e5gra s\u00e4tt p\u00e5 vilka du kan skriva versionshanteringssystem. Kolla in dem:<\/p>\n\n<ul class=\"wp-block-list\">\n<li>V\u00e4lja r\u00e4tt versionskontrollsystem som Mercurial, SVN, Git, etc.<\/li>\n\n\n\n<li>Anv\u00e4nd grenar eftersom de kan separera de olika versionerna av koden, vilket g\u00f6r det l\u00e4ttare att arbeta med de olika funktionerna utan att de st\u00f6r varandra<\/li>\n\n\n\n<li>Med hj\u00e4lp av pull requests kan du granska kod\u00e4ndringar, samarbeta med andra utvecklare och g\u00f6ra \u00e4ndringar s\u00e5 att de kan sammanfogas med kodbasen.  <\/li>\n\n\n\n<li>Anv\u00e4nd taggar f\u00f6r att markera viktiga milstolpar s\u00e5 att du enkelt kan f\u00f6lja f\u00f6r\u00e4ndringarna.  <\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\" id=\"-conclusion-\"><strong>Slutsats<\/strong><\/h3>\n\n<p class=\"wp-block-paragraph\">Detta \u00e4r n\u00e5gra exempel p\u00e5 hur du kan skriva programvara som kan underh\u00e5llas. Och n\u00e4r programvaran \u00e4r klar, gl\u00f6m inte testningen och testautomatiseringen eftersom de \u00e4r s\u00e5 viktiga, inte bara i utvecklingsfasen utan ocks\u00e5 f\u00f6r att uppr\u00e4tth\u00e5lla kodkvaliteten. N\u00e5gra av de vanligaste testtyperna \u00e4r enhetstestning, integrationstestning, regressionstestning och testautomatisering:<\/p>\n\n<p class=\"wp-block-paragraph\">Intressanta l\u00e4nkar:<\/p>\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.sealights.io\/software-quality\/software-maintainability-what-it-means-to-build-maintainable-software\/\">Mer information om underh\u00e5ll av programvara<\/a><\/p>\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.oreilly.com\/content\/what-is-maintainability\/\">Kontrollera vad underh\u00e5llbarhet \u00e4r inom mjukvaruutveckling<\/a><\/p>\n\n<p class=\"wp-block-paragraph\" id=\"block-c2d83490-e9b4-4038-96ff-d995e535c318\">Bilder: Canva<\/p>\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" id=\"block-a2e18acd-d91c-40c4-9d4c-6953d5e70eb2\"\/>\n<div class=\"wp-block-image\">\n<figure class=\"alignleft\"><img decoding=\"async\" src=\"https:\/\/www.software-developer-india.com\/wp-content\/uploads\/2015\/02\/1.jpg\" alt=\"\" class=\"wp-image-229\"\/><\/figure>\n<\/div>\n<p class=\"wp-block-paragraph\">F\u00f6rfattaren: Sascha Thattil arbetar p\u00e5 Software-Developer-India.com som \u00e4r en del av YUHIRO Group. 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