{"id":15103,"date":"2022-10-10T10:27:02","date_gmt":"2022-10-10T04:57:02","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-can-someone-explain-this-piece-of-code-to-me\/"},"modified":"2022-10-10T10:27:02","modified_gmt":"2022-10-10T04:57:02","slug":"solved-can-someone-explain-this-piece-of-code-to-me","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-can-someone-explain-this-piece-of-code-to-me\/","title":{"rendered":"[Solved] Can someone explain this piece of code to me"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-41780917\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"41780917\" data-parentid=\"41780889\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>It appears that <code>variable<\/code> is an array that stores references (URIs, or paths) to images, that is fed to the <code>src<\/code> attribute of an image element, <code>&lt;img&gt;<\/code>. The script simple does the following logic:<\/p>\n<ul>\n<li>When the function is fired, it increments <code>index<\/code> by 1<\/li>\n<li>If index is equal to the number of images, you return it to 0 (basically &#8220;cycling&#8221; through the array<\/li>\n<li>You set the image source to the nth element of the <code>variable<\/code> array, by the index <code>index<\/code><\/li>\n<\/ul>\n<p>An intelligent guess would be that this is a image cycling function. When <code>nextvariableClick<\/code> is called it cycles through a list of images in the order they appear in the <code>variable<\/code> array.<\/p>\n<p>Since the script is so simple, the best way to see what it does is to construct a functional code snippet:<\/p>\n<\/p>\n<div class=\"snippet\" data-lang=\"js\" data-hide=\"false\" data-console=\"true\" data-babel=\"false\">\n<div class=\"snippet-code\">\n<pre class=\"snippet-code-js lang-js prettyprint-override\"><code>\/\/ Define dummy image references\r\nvar variable = [\r\n  'https:\/\/placehold.it\/500x300\/e41a1c\/ffffff',\r\n  'https:\/\/placehold.it\/500x300\/377eb8\/ffffff',\r\n  'https:\/\/placehold.it\/500x300\/4daf4a\/ffffff',\r\n  'https:\/\/placehold.it\/500x300\/984ea3\/ffffff',\r\n  'https:\/\/placehold.it\/500x300\/ff7f00\/ffffff'\r\n];\r\n\r\n\/* Start of code you have provided *\/\r\nvar index = 0;\r\nvar variableLen = variable.length;\r\n\r\nfunction nextvariableClick() {\r\n  index++;\r\n\r\n  if (index == variableLen)\r\n    index = 0;\r\n\r\n  var image = document.getElementById('starting_light');\r\n  image.src = variable[index];\r\n\r\n}\r\n\/* End of code you have provided *\/\r\n\r\n\/\/ We execute the function to start initialise it, and set a starting image\r\nnextvariableClick();\r\nwindow.setInterval(nextvariableClick, 1000);<\/code><\/pre>\n<pre class=\"snippet-code-html lang-html prettyprint-override\"><code>&lt;p&gt;The function is called at runtime, and called every 1s. You should see cycling of image sources.&lt;\/p&gt;\r\n&lt;img id=\"starting_light\" src=\"\" \/&gt;<\/code><\/pre>\n<\/div>\n<\/div><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">0<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Can someone explain this piece of code to me <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] It appears that variable is an array that stores references (URIs, or paths) to images, that is fed to the src attribute of an image element, &lt;img&gt;. The script simple does the following logic: When the function is fired, it increments index by 1 If index is equal to the number of images, you &#8230; <a title=\"[Solved] Can someone explain this piece of code to me\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-can-someone-explain-this-piece-of-code-to-me\/\" aria-label=\"More on [Solved] Can someone explain this piece of code to me\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[333],"class_list":["post-15103","post","type-post","status-publish","format-standard","hentry","category-solved","tag-javascript"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Can someone explain this piece of code to me - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-can-someone-explain-this-piece-of-code-to-me\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Can someone explain this piece of code to me - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] It appears that variable is an array that stores references (URIs, or paths) to images, that is fed to the src attribute of an image element, &lt;img&gt;. 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