x-posted from stack overflow - Teh Forum

<body> <div id="header"> <span class="left"> <span class="back"><a href="lthread_list.php?webtag=DEFAULT"><span class="image mobile_back" title="Back"></span></a></span> <span class="image mobile_logo" title="Beehive Forum Logo"></span> </span> <ul> <li> <a class="reply_all" href="lpost.php?webtag=DEFAULT&reply_to=42257.0&return_msg=42257.7"> <span class="image mobile_reply_all"></span><span class="text">Reply to All</span> </a> </li> <li> <a class="navigation" href="#"> <span class="image mobile_navigation"></span><span class="text">Show messages</span> </a> </li> <li> <a class="main" href="#"><span class="image mobile_menu" title="Menu"></span> </a> </li> </ul> </div> <div class="menu main"> <ul> <li><a href="lthread_list.php?webtag=DEFAULT">Messages</a></li> <li><a href="lpm.php?webtag=DEFAULT">Inbox</a></li> <li><a href="lsearch.php?webtag=DEFAULT">Search</a></li> <li><a href="llogon.php?webtag=DEFAULT">Login</a></li> </ul> </div> <div class="menu navigation"><a href="lmessages.php?webtag=DEFAULT&msg=42257.1">1–10</a><a href="lmessages.php?webtag=DEFAULT&msg=42257.11">11–12</a></div> <div id="page_content"> <h3 class="thread_title"><a href="index.php?webtag=DEFAULT&amp;msg=42257.7">x-posted from stack overflow</a> </h3> <div id="messages" data-navigation="42257_7_12_10"> <a name="a42257_7"></a><div class="message" id="message_42257_7"> <div class="message_header"> <div class="message_from"> From: CHYRON (DSMITHHFX)<span class="message_time">31 Oct 2018 12:21</span> <div class="clearer"></div> </div><div class="message_to">To: Peter (BOUGHTONP) <span><span class="image post_read" title="Read: 31 Oct 2018 22:43"></span></span> <span class="message_count">7 of 12</span><div class="clearer"></div> </div> </div> <div class="message_links"> <a href="lmessages.php?webtag=DEFAULT&msg=42257.7">42257.7</a> In reply to <a href="lmessages.php?webtag=DEFAULT&msg=42257.6">42257.6</a></div> <div class="message_body"> <strong>Quote:</strong> <div class="quote"> <pre> var cacheArray = Object.values(alldatesobj).map (function(item){ return item.replace(/100315/,'$&/thumbs'; });</pre> </div> Yeah that works! <span class="emoticon e_bounce" title="(bounce)"><span class="e__">(bounce)</span></span><br /><br /> I had read about the map function, but according to some folks somewhere on the internet, it should not be needed and costs more cpu cycles (or something).<br /> <div class="quotetext"><strong>Quote:</strong> </div> <div class="quote">What does alldates.txt contain?</div> <br /> It's an array with key-value pairs, keys are 4-digit dates (mmdd), values are image names (*.jpg) used to display a specific new image each day here:<br /><a href="http://designartcraft.com/photo/afbp.htm">http://designartcraft.com/photo/afbp.htm</a> and randomly here:<br /><a href="http://designartcraft.com/photo/random.html">http://designartcraft.com/photo/random.html</a><br /><br /><br /> The purpose of all this is to cache thumbs (same names, in "/thumbs") for offline.<br /><br /> I'm slowly trying to get up to speed on modren javascript syntax without relying on jquery (which doesn't work in service workers). Long ways to go, obviously.<br /><br /> Thanks!<br /><br /> <div class="edit_text">EDITED: 31 Oct 2018 12:32 by DSMITHHFX</div> </div> <div class="message_footer"> <div class="message_footer_links"><a href="lpost.php?webtag=DEFAULT&reply_to=42257.7&return_msg=42257.7" class="reply"><span class="image post"></span>Reply</a></div> <div class="message_vote_form" data-msg="42257.7"> <span class="rating">0/0</span> <span class="image vote vote_down vote_down_off" title="Vote Down"></span> <span class="image vote vote_up vote_up_off" title="Vote Up"></span> </div> </div> </div><a name="a42257_8"></a><div class="message" id="message_42257_8"> <div class="message_header"> <div class="message_from"> From: Peter (BOUGHTONP)<span class="message_time">31 Oct 2018 23:34</span> <div class="clearer"></div> </div><div class="message_to">To: CHYRON (DSMITHHFX) <span><span class="image post_read" title="Read: 1 Nov 2018 09:11"></span></span> <span class="message_count">8 of 12</span><div class="clearer"></div> </div> </div> <div class="message_links"> <a href="lmessages.php?webtag=DEFAULT&msg=42257.8">42257.8</a> In reply to <a href="lmessages.php?webtag=DEFAULT&msg=42257.7#a42257_7" target="_self">42257.7</a></div> <div class="message_body"> <i>> it should not be needed and costs more cpu cycles (or something).</i> <p>The same can be said for anything that isn't assembly language. </p><p>There's no situation where map is <em>necessary</em> - it can always be replaced with a loop - but there's plenty of situations when it makes code easier to understand and work with, and that should generally be the primary concern for the first iteration of any code. (Which isn't to say always use map - it's possible to misuse just like any construct - but don't be afraid to use it when suitable.) </p><p>Performance matters when you can show the difference - if a web script takes half a second to run, then absolutely spend some time to identify and optimise the slowest aspect (and that's not always the most obvious one), but if its 38ms vs 35ms then it's less likely to matter. </p><p><br /></p><p>><i> I'm slowly trying to get up to speed on modren javascript syntax without relying on jquery</i> </p><p>I recently decided to write a jquery-free library for scattering images, and it's interesting to see what's now possible and how browser vendors have still managed to over-complicate simple tasks. </p><p>I found <a href="https://developer.mozilla.org/en-US/">MDN</a> to be the best resource, although sometimes you need to know what to look for first - definitely useful for getting the right polyfills if you want to support older browsers whilst still using modern methods.</p></div> <div class="message_footer"> <div class="message_footer_links"><a href="lpost.php?webtag=DEFAULT&reply_to=42257.8&return_msg=42257.7" class="reply"><span class="image post"></span>Reply</a></div> <div class="message_vote_form" data-msg="42257.8"> <span class="rating">+1/1</span> <span class="image vote vote_down vote_down_off" title="Vote Down"></span> <span class="image vote vote_up vote_up_off" title="Vote Up"></span> </div> </div> </div><a name="a42257_9"></a><div class="message" id="message_42257_9"> <div class="message_header"> <div class="message_from"> From: CHYRON (DSMITHHFX)<span class="message_time"> 1 Nov 2018 09:18</span> <div class="clearer"></div> </div><div class="message_to">To: Peter (BOUGHTONP) <span><span class="image post_read" title="Read: 1 Nov 2018 21:30"></span></span> <span class="message_count">9 of 12</span><div class="clearer"></div> </div> </div> <div class="message_links"> <a href="lmessages.php?webtag=DEFAULT&msg=42257.9">42257.9</a> In reply to <a href="lmessages.php?webtag=DEFAULT&msg=42257.7#a42257_8" target="_self">42257.8</a></div> <div class="message_body"> I'm using MDN quite a lot. Explanations are sparse, useful examples rare, and there's an assumption of underlying familiarity with syntax that can make it pretty difficult to follow. </div> <div class="message_footer"> <div class="message_footer_links"><a href="lpost.php?webtag=DEFAULT&reply_to=42257.9&return_msg=42257.7" class="reply"><span class="image post"></span>Reply</a></div> <div class="message_vote_form" data-msg="42257.9"> <span class="rating">0/0</span> <span class="image vote vote_down vote_down_off" title="Vote Down"></span> <span class="image vote vote_up vote_up_off" title="Vote Up"></span> </div> </div> </div><a name="a42257_10"></a><div class="message" id="message_42257_10"> <div class="message_header"> <div class="message_from"> From: Chris (CHRISSS)<span class="message_time"> 1 Nov 2018 20:15</span> <div class="clearer"></div> </div><div class="message_to">To: Peter (BOUGHTONP) <span><span class="image post_read" title="Read: 1 Nov 2018 21:30"></span></span> <span class="message_count">10 of 12</span><div class="clearer"></div> </div> </div> <div class="message_links"> <a href="lmessages.php?webtag=DEFAULT&msg=42257.10">42257.10</a> In reply to <a href="lmessages.php?webtag=DEFAULT&msg=42257.7#a42257_8" target="_self">42257.8</a></div> <div class="message_body"> What is polyfill?</div> <div class="message_footer"> <div class="message_footer_links"><a href="lpost.php?webtag=DEFAULT&reply_to=42257.10&return_msg=42257.7" class="reply"><span class="image post"></span>Reply</a></div> <div class="message_vote_form" data-msg="42257.10"> <span class="rating">0/0</span> <span class="image vote vote_down vote_down_off" title="Vote Down"></span> <span class="image vote vote_up vote_up_off" title="Vote Up"></span> </div> </div> </div><a name="a42257_11"></a><div class="message" id="message_42257_11"> <div class="message_header"> <div class="message_from"> From: Peter (BOUGHTONP)<span class="message_time"> 1 Nov 2018 21:39</span> <div class="clearer"></div> </div><div class="message_to">To: Chris (CHRISSS) <span><span class="image post_read" title="Read: 1 Nov 2018 23:19"></span></span> <span class="message_count">11 of 12</span><div class="clearer"></div> </div> </div> <div class="message_links"> <a href="lmessages.php?webtag=DEFAULT&msg=42257.11">42257.11</a> In reply to <a href="lmessages.php?webtag=DEFAULT&msg=42257.7#a42257_10" target="_self">42257.10</a></div> <div class="message_body"> It's the thick paste you use on walls to smooth over cracks. <p><img src="http://www.kentblaxill.co.uk/images/ww/product/PolyfillaMPinterior.jpg" alt="PolyfillaMPinterior.jpg" /></p><p>It's also when you re-implement native functionality from newer browsers in JavaScript for the benefit of older browsers - see for example <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map#Polyfill">the Array.prototype.map polyfill</a>.</p><div class="edit_text">EDITED: 1 Nov 2018 22:00 by BOUGHTONP</div> </div> <div class="message_footer"> <div class="message_footer_links"><a href="lpost.php?webtag=DEFAULT&reply_to=42257.11&return_msg=42257.7" class="reply"><span class="image post"></span>Reply</a></div> <div class="message_vote_form" data-msg="42257.11"> <span class="rating">+1/1</span> <span class="image vote vote_down vote_down_off" title="Vote Down"></span> <span class="image vote vote_up vote_up_off" title="Vote Up"></span> </div> </div> </div><a name="a42257_12"></a><div class="message" id="message_42257_12"> <div class="message_header"> <div class="message_from"> From: Peter (BOUGHTONP)<span class="message_time"> 1 Nov 2018 21:59</span> <div class="clearer"></div> </div><div class="message_to">To: CHYRON (DSMITHHFX) <span><span class="image post_read" title="Read: 1 Nov 2018 23:16"></span></span> <span class="message_count">12 of 12</span><div class="clearer"></div> </div> </div> <div class="message_links"> <a href="lmessages.php?webtag=DEFAULT&msg=42257.12">42257.12</a> In reply to <a href="lmessages.php?webtag=DEFAULT&msg=42257.7#a42257_9" target="_self">42257.9</a></div> <div class="message_body"> ><i> Explanations are sparse</i> <p>I prefer the term concise - no need to dredge through unnecessary waffle to figure out what something does. </p><br /><p>><i> useful examples rare</i> </p><p>Possibly. On most sites I tend towards going straight to the examples because the explanations are waffle, but don't need to with MDN. </p><br /><p>><i> there's an assumption of underlying familiarity</i> </p><p>That'll be because it's mostly a reference. </p><p>There is a <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide">JavaScript Guide</a> which appears very comprehensive, but looking at a few pages it does a horrific job of explaining stuff and has some terrible examples, so, yeah... that sucks. <span class="emoticon e_unsure" title=":/"><span class="e__">:/</span></span></p><div class="edit_text">EDITED: 1 Nov 2018 22:01 by BOUGHTONP</div> </div> <div class="message_footer"> <div class="message_footer_links"><a href="lpost.php?webtag=DEFAULT&reply_to=42257.12&return_msg=42257.7" class="reply"><span class="image post"></span>Reply</a></div> <div class="message_vote_form" data-msg="42257.12"> <span class="rating">0/0</span> <span class="image vote vote_down vote_down_off" title="Vote Down"></span> <span class="image vote vote_up vote_up_off" title="Vote Up"></span> </div> </div> </div></div> </div> </body>