{"id":4379,"date":"2026-07-08T10:28:56","date_gmt":"2026-07-08T10:28:56","guid":{"rendered":"https:\/\/bliv-klogere.dk\/?page_id=4379"},"modified":"2026-07-08T10:36:10","modified_gmt":"2026-07-08T10:36:10","slug":"13-kodning","status":"publish","type":"page","link":"https:\/\/bliv-klogere.dk\/index.php\/13-kodning\/","title":{"rendered":"13. Kodning"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Indholdsfortegnelse<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/bliv-klogere.dk\/index.php\/13-kodning\/#1_Apps_er_opbygget_af_kodning_i_lag\" >1. Apps er opbygget af kodning i lag<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/bliv-klogere.dk\/index.php\/13-kodning\/#2_De_7_grundlaeggende_former_for_kode\" >2. De 7 grundl\u00e6ggende former for kode<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/bliv-klogere.dk\/index.php\/13-kodning\/#3_Kort_om_databaser\" >3. Kort om databaser<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Apps_er_opbygget_af_kodning_i_lag\"><\/span>1. Apps er opbygget af kodning i lag<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Der er en traditionel opdeling af alle programmer i lag:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Frontend<\/li>\n\n\n\n<li>Backend<\/li>\n\n\n\n<li>Database<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Lag<\/strong><\/td><td><strong>Anvendelse<\/strong><\/td><td><strong>Hvis apps var en restauraut, s\u00e5 &#8230;<\/strong><\/td><\/tr><tr><td>Frontend<\/td><td>Det, som brugeren ser. Brugerflader. P\u00e5 hjemmesider bruges html og css<\/td><td>Der, hvor g\u00e6sterne m\u00e5 f\u00e6rdes. Indgang, stole, borde, garderope, toiletter<\/td><\/tr><tr><td>Backend \/ forretningslag<\/td><td>Det, der sker &#8220;bag linjerne&#8221;, n\u00e5r man klikker p\u00e5 en knap eller g\u00f8r andre i et program. F.eks. sender kr. 50 med mobile pay til moster Sofie<\/td><td>Kontorer, k\u00f8kken, opbevaringsrum<\/td><\/tr><tr><td>Database<\/td><td>Det, som er der, n\u00e5r programmet er slukket. F.eks. st\u00e5r der stadigv\u00e6k det samme p\u00e5 din konto, n\u00e5r du igen t\u00e6nder for din app til din bank.<\/td><td>Inventar, madvarer, opskrifter. Alt, som er der, n\u00e5r restauranten er lukket<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Til <a href=\"https:\/\/bliv-klogere.dk\/index.php\/13-kodning\/\">toppen af siden<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_De_7_grundlaeggende_former_for_kode\"><\/span>2. De 7 grundl\u00e6ggende former for kode<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Form<\/strong><\/td><td><strong>Forklaring<\/strong><\/td><\/tr><tr><td>1. Variabel<\/td><td>En kasse, der kan indeholde 1 og kun 1 v\u00e6rdi. F.eks. tallet 7. Men den kan skiftes lige s\u00e5 ofte, som man vil. Lige som m\u00e5l p\u00e5 en m\u00e5ltavle. Faktisk det samme som i matematik<\/td><\/tr><tr><td>2. Sekvens<\/td><td>R\u00e6kkef\u00f8lge. Ofte skal kode skrives i en bestemt r\u00e6kkef\u00f8lge for at virke<\/td><\/tr><tr><td>3. Hvis &#8230; s\u00e5 (if &#8230; else)<\/td><td>Kan tr\u00e6ffe beslutninger: Hvis Sofie er over 17 \u00e5r, m\u00e5 hun tage k\u00f8rekort. Ellers ikke<\/td><\/tr><tr><td>4. Arrays og loops<\/td><td>Arrays er en liste, dvs. en samling af variable. Loops kan l\u00f8be lister igennem og vise resultatet<\/td><\/tr><tr><td>5. Funktion<\/td><td>Stik-i-rend dreng. N\u00e5r man klikker p\u00e5 noget, udf\u00f8res noget kode. Koden er samlet i en funktion<\/td><\/tr><tr><td>6. Event<\/td><td>N\u00e5r brugeren klikker p\u00e5 en knap, s\u00e5 sker der en event. Det g\u00f8r der ogs\u00e5, hvis man f.eks. skyder i et spil. Eventen kalder p\u00e5 en funktion<\/td><\/tr><tr><td>7. Kommentarer<\/td><td>Mennesketekst, som ikke l\u00e6ses som kode<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Playliste 02. Kodning og databaser\" width=\"604\" height=\"340\" src=\"https:\/\/www.youtube.com\/embed\/videoseries?list=PLPxLlEtXyUEI3NEfqDy5UOJH0XkMrMmmL\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"1  Variabel\" width=\"604\" height=\"340\" src=\"https:\/\/www.youtube.com\/embed\/ZucokMhvksA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"2  Sekvens\" width=\"604\" height=\"340\" src=\"https:\/\/www.youtube.com\/embed\/EpOoWBoXUEQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"3  Forgrening og betingelse\" width=\"604\" height=\"340\" src=\"https:\/\/www.youtube.com\/embed\/-jKlNQoCeFY?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"4  Arrays og loops\" width=\"604\" height=\"340\" src=\"https:\/\/www.youtube.com\/embed\/JGNtsZwhQ2g?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"5  Funktioner\" width=\"604\" height=\"340\" src=\"https:\/\/www.youtube.com\/embed\/exBK2KTcxKk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"6  Events og funktioner\" width=\"604\" height=\"340\" src=\"https:\/\/www.youtube.com\/embed\/yi5ivNKt0lM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"7  Kommentarer\" width=\"604\" height=\"340\" src=\"https:\/\/www.youtube.com\/embed\/2hre6b5guYA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Til <a href=\"https:\/\/bliv-klogere.dk\/index.php\/13-kodning\/\">toppen af siden<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Kort_om_databaser\"><\/span>3. Kort om databaser<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>En database er intet andet end en tabel. Stor eller lille tabel, det er ligegyldigt. Bare det er en tabel<\/li>\n\n\n\n<li>Tabellen kan deles op i undertabeller, men i bund og grund er en database bare en tabel<\/li>\n\n\n\n<li>Man kan kun udf\u00f8re 4 handlinger med en database\n<ul class=\"wp-block-list\">\n<li>Oprette data<\/li>\n\n\n\n<li>Hente data<\/li>\n\n\n\n<li>Redigere data<\/li>\n\n\n\n<li>Slette data<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Til <a href=\"https:\/\/bliv-klogere.dk\/index.php\/13-kodning\/\">toppen af siden<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1. Apps er opbygget af kodning i lag Der er en traditionel opdeling af alle programmer i lag: Lag Anvendelse Hvis apps var en restauraut, s\u00e5 &#8230; Frontend Det, som brugeren ser. Brugerflader. P\u00e5 hjemmesider bruges html og css Der, hvor g\u00e6sterne m\u00e5 f\u00e6rdes. Indgang, stole, borde, garderope, toiletter Backend \/ forretningslag Det, der sker &hellip; <a href=\"https:\/\/bliv-klogere.dk\/index.php\/13-kodning\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">13. Kodning<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-4379","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/bliv-klogere.dk\/index.php\/wp-json\/wp\/v2\/pages\/4379","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bliv-klogere.dk\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/bliv-klogere.dk\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/bliv-klogere.dk\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bliv-klogere.dk\/index.php\/wp-json\/wp\/v2\/comments?post=4379"}],"version-history":[{"count":6,"href":"https:\/\/bliv-klogere.dk\/index.php\/wp-json\/wp\/v2\/pages\/4379\/revisions"}],"predecessor-version":[{"id":4389,"href":"https:\/\/bliv-klogere.dk\/index.php\/wp-json\/wp\/v2\/pages\/4379\/revisions\/4389"}],"wp:attachment":[{"href":"https:\/\/bliv-klogere.dk\/index.php\/wp-json\/wp\/v2\/media?parent=4379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}