[solved] wml.get_child for unit - Page 2 - The Battle for Wesnoth Forums

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class="sr-only">Post</span> </a> <span class="responsive-hide">by <strong><a href="./../memberlist.php?mode=viewprofile&u=131665&sid=82a90fbf901ae9eb044287746a6cfc34" style="color: #D52929;" class="username-coloured">Celtic_Minstrel</a></strong> » </span><time datetime="2024-08-22T17:38:03+00:00">August 22nd, 2024, 5:38 pm</time> </p> <div class="content"><blockquote cite="./../viewtopic.php?p=692726&sid=82a90fbf901ae9eb044287746a6cfc34#p692726"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34">white_haired_uncle</a> wrote: <a href="./../viewtopic.php?p=692726&sid=82a90fbf901ae9eb044287746a6cfc34#p692726" data-post-id="692726" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 3:58 pm</span></cite> So does that mean any changes I make are "stored" immediately? I thought I had to "unstore" the unit (e.g to_map). </div></blockquote>Nope, __cfg can be thought of as a WML <em class="text-italics">copy</em> of the unit.<br> <blockquote cite="./../viewtopic.php?p=692726&sid=82a90fbf901ae9eb044287746a6cfc34#p692726"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34">white_haired_uncle</a> wrote: <a href="./../viewtopic.php?p=692726&sid=82a90fbf901ae9eb044287746a6cfc34#p692726" data-post-id="692726" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 3:58 pm</span></cite> I've always thought of .__cfg as being akin to storing the unit. </div></blockquote>It is <em class="text-italics">exactly</em> the same apart from not going into a WML variable.<br> <blockquote cite="./../viewtopic.php?p=692726&sid=82a90fbf901ae9eb044287746a6cfc34#p692726"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34">white_haired_uncle</a> wrote: <a href="./../viewtopic.php?p=692726&sid=82a90fbf901ae9eb044287746a6cfc34#p692726" data-post-id="692726" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 3:58 pm</span></cite> But in WML, I store a unit to a variable, which is then just a WML variable and I can do whatever I want with it (or not). And I suppose I could store it to multiple variables, each independent of the others. Short of doing a by-value copy, I don't think I can do this in lua (this is a rather silly example that can help me understand, not something I can see myself doing). </div></blockquote>Sure you can. Access <code class="inline-code">__cfg</code> twice and now you have two independent WML copies of the unit.<br> <blockquote cite="./../viewtopic.php?p=692726&sid=82a90fbf901ae9eb044287746a6cfc34#p692726"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34">white_haired_uncle</a> wrote: <a href="./../viewtopic.php?p=692726&sid=82a90fbf901ae9eb044287746a6cfc34#p692726" data-post-id="692726" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 3:58 pm</span></cite> My immediate confusion likes with "It'll serialize <em class="text-italics">every time you access it</em>". Seems like that would mean if I made a change the next time I accessed .__cfg my change would be overwritten by the serialized data from the unit. Unless behind the scenes there are actually two copies of the unit, the "real" one and the ".__cfg" one and I'm getting a serialized version of the latter. Then "unstoring" would be syncing the real one from the "working copy". </div></blockquote>I don't really get your confusion or how you drew any of these conclusions. Every time you access <code class="inline-code">unit.__cfg</code>, the game serializes that unit to WML and returns the result. If you access <code class="inline-code">__cfg</code> twice in a row, you'll end up with two identical but independent WML tables. If you access <code class="inline-code">__cfg</code>, make some change to the unit directly, and access <code class="inline-code">__cfg</code> again, the first WML table reflects the state of the unit before the change and the second WML table reflects the state of the unit after the change.<br> <blockquote cite="./../viewtopic.php?p=692730&sid=82a90fbf901ae9eb044287746a6cfc34#p692730"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34">white_haired_uncle</a> wrote: <a href="./../viewtopic.php?p=692730&sid=82a90fbf901ae9eb044287746a6cfc34#p692730" data-post-id="692730" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 4:28 pm</span></cite> Are you saying there is a difference in serialization cost between: <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>local unit = wesnoth.units.find_on_map(cfg)[1] unit.__cfg.hitpoints=23 unit.__cfg.language_name=_"Uncle Bob" unit.__cfg.experience=100</code></pre></div> and<br> <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>local unit = wesnoth.units.find_on_map(cfg)[1].__cfg unit.hitpoints=23 unit.language_name=_"Uncle Bob" unit.experience=100 </code></pre></div> </div></blockquote>There is, and also the first version results in no change to the unit, since you're only modifying the temporary WML table that was created when you accessed <code class="inline-code">__cfg</code>. The second version doesn't serialize anything. It directly modifies the unit.</div> <div id="sig692733" class="signature">Author of <a href="http://r.wesnoth.org/t37342" class="postlink">The Black Cross of Aleron</a> campaign and <a href="http://r.wesnoth.org/t37417" class="postlink">Default++</a> era.<br> Former maintainer of <a href="http://r.wesnoth.org/t26527" class="postlink">Steelhive</a>.</div> </div> </div> <div class="back2top"> <a href="#top" class="top" title="Top"> <i class="icon fa-chevron-circle-up fa-fw icon-gray" aria-hidden="true"></i> <span class="sr-only">Top</span> </a> </div> </div> </div> <div id="p692737" class="post has-profile bg1"> <div class="inner"> <dl class="postprofile" id="profile692737"> <dt class="no-profile-rank no-avatar"> <div class="avatar-container"> </div> <a href="./../memberlist.php?mode=viewprofile&u=122117&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">gnombat</a> </dt> <dd class="profile-posts"><strong>Posts:</strong> <a href="./../search.php?author_id=122117&sr=posts&sid=82a90fbf901ae9eb044287746a6cfc34">826</a></dd> <dd class="profile-joined"><strong>Joined:</strong> June 10th, 2010, 8:49 pm</dd> </dl> <div class="postbody"> <div id="post_content692737"> <h3 > <a href="./../viewtopic.php?p=692737&sid=82a90fbf901ae9eb044287746a6cfc34#p692737">Re: wml.get_child for unit</a> </h3> <ul class="post-buttons"> <li> <a href="./../posting.php?mode=quote&p=692737&sid=82a90fbf901ae9eb044287746a6cfc34" title="Reply with quote" class="button button-icon-only"> <i class="icon fa-quote-left fa-fw" aria-hidden="true"></i><span class="sr-only">Quote</span> </a> </li> </ul> <p class="author"> <a class="unread" href="./../viewtopic.php?p=692737&sid=82a90fbf901ae9eb044287746a6cfc34#p692737" title="Post"> <i class="icon fa-file fa-fw icon-lightgray icon-md" aria-hidden="true"></i><span class="sr-only">Post</span> </a> <span class="responsive-hide">by <strong><a href="./../memberlist.php?mode=viewprofile&u=122117&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">gnombat</a></strong> » </span><time datetime="2024-08-22T18:05:04+00:00">August 22nd, 2024, 6:05 pm</time> </p> <div class="content"><blockquote cite="./../viewtopic.php?p=692731&sid=82a90fbf901ae9eb044287746a6cfc34#p692731"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=129456&sid=82a90fbf901ae9eb044287746a6cfc34">Ravana</a> wrote: <a href="./../viewtopic.php?p=692731&sid=82a90fbf901ae9eb044287746a6cfc34#p692731" data-post-id="692731" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 4:44 pm</span></cite> Yes. Different behaviour too if you wanted to do anything with the wml table.<br> <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>$ unit.__cfg == unit.__cfg false </code></pre></div> </div></blockquote> <blockquote cite="./../viewtopic.php?p=692733&sid=82a90fbf901ae9eb044287746a6cfc34#p692733"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=131665&sid=82a90fbf901ae9eb044287746a6cfc34">Celtic_Minstrel</a> wrote: <a href="./../viewtopic.php?p=692733&sid=82a90fbf901ae9eb044287746a6cfc34#p692733" data-post-id="692733" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 5:38 pm</span></cite> I don't really get your confusion or how you drew any of these conclusions. Every time you access <code class="inline-code">unit.__cfg</code>, the game serializes that unit to WML and returns the result. If you access <code class="inline-code">__cfg</code> twice in a row, you'll end up with two identical but independent WML tables. If you access <code class="inline-code">__cfg</code>, make some change to the unit directly, and access <code class="inline-code">__cfg</code> again, the first WML table reflects the state of the unit before the change and the second WML table reflects the state of the unit after the change. </div></blockquote> Personally I think it would be better if it were something like <code class="inline-code">.cfg()</code> instead of <code class="inline-code">.__cfg</code>. Magical properties are always confusing.<br> <blockquote cite="./../viewtopic.php?p=692733&sid=82a90fbf901ae9eb044287746a6cfc34#p692733"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=131665&sid=82a90fbf901ae9eb044287746a6cfc34">Celtic_Minstrel</a> wrote: <a href="./../viewtopic.php?p=692733&sid=82a90fbf901ae9eb044287746a6cfc34#p692733" data-post-id="692733" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 5:38 pm</span></cite> The second version doesn't serialize anything. </div></blockquote> It doesn't? (Did you see the <code class="inline-code">.__cfg</code> at the end of the first line?)</div> </div> </div> <div class="back2top"> <a href="#top" class="top" title="Top"> <i class="icon fa-chevron-circle-up fa-fw icon-gray" aria-hidden="true"></i> <span class="sr-only">Top</span> </a> </div> </div> </div> <div id="p692743" class="post has-profile bg2"> <div class="inner"> <dl class="postprofile" id="profile692743"> <dt class="no-profile-rank no-avatar"> <div class="avatar-container"> </div> <a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">white_haired_uncle</a> </dt> <dd class="profile-posts"><strong>Posts:</strong> <a href="./../search.php?author_id=165464&sr=posts&sid=82a90fbf901ae9eb044287746a6cfc34">1449</a></dd> <dd class="profile-joined"><strong>Joined:</strong> August 26th, 2018, 11:46 pm</dd> <dd class="profile-custom-field profile-phpbb_location"><strong>Location:</strong> A country place, far outside the Wire</dd> </dl> <div class="postbody"> <div id="post_content692743"> <h3 > <a href="./../viewtopic.php?p=692743&sid=82a90fbf901ae9eb044287746a6cfc34#p692743">Re: wml.get_child for unit</a> </h3> <ul class="post-buttons"> <li> <a href="./../posting.php?mode=quote&p=692743&sid=82a90fbf901ae9eb044287746a6cfc34" title="Reply with quote" class="button button-icon-only"> <i class="icon fa-quote-left fa-fw" aria-hidden="true"></i><span class="sr-only">Quote</span> </a> </li> </ul> <p class="author"> <a class="unread" href="./../viewtopic.php?p=692743&sid=82a90fbf901ae9eb044287746a6cfc34#p692743" title="Post"> <i class="icon fa-file fa-fw icon-lightgray icon-md" aria-hidden="true"></i><span class="sr-only">Post</span> </a> <span class="responsive-hide">by <strong><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">white_haired_uncle</a></strong> » </span><time datetime="2024-08-22T19:44:26+00:00">August 22nd, 2024, 7:44 pm</time> </p> <div class="content"><blockquote cite="./../viewtopic.php?p=692733&sid=82a90fbf901ae9eb044287746a6cfc34#p692733"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=131665&sid=82a90fbf901ae9eb044287746a6cfc34">Celtic_Minstrel</a> wrote: <a href="./../viewtopic.php?p=692733&sid=82a90fbf901ae9eb044287746a6cfc34#p692733" data-post-id="692733" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 5:38 pm</span></cite> <br> I don't really get your confusion or how you drew any of these conclusions. Every time you access <code class="inline-code">unit.__cfg</code>, the game serializes that unit to WML and returns the result. If you access <code class="inline-code">__cfg</code> twice in a row, you'll end up with two identical but independent WML tables. If you access <code class="inline-code">__cfg</code>, make some change to the unit directly, and access <code class="inline-code">__cfg</code> again, the first WML table reflects the state of the unit before the change and the second WML table reflects the state of the unit after the change.<br> </div></blockquote> <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>local a = wesnoth.units.find_on_map({id = Bob})[1].__cfg local b = wesnoth.units.find_on_map({id = Bob})[1].__cfg</code></pre></div> Now, as I understand it, that's two copies of Bob serialized and stored in completely separate tables (and if this is true, I believe it confirms my suspicion that .__cfg is not a table, it RETURNS a table). No changes to a will affect b, and nothing I do to a or b will affect Bob until I "unstore" a or b.<br> <br> Here's where it gets interesting:<br> <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>u = wesnoth.units.find_on_map({id = Bob})[1] print(u.__cfg.hitpoints) ==> 24 u.__cfg.hitpoints=12 print(u.__cfg.hitpoints) ==> ???</code></pre></div> I would have thought the second print would print 12. But if every access to .__cfg serializes from the unit (Bob), and I've done nothing here to change Bob, then I guess it would print 24.<br> <br> I probably just need to play with it a bit. My gut is telling me the second code block is either just stupid, or making a change this way will only work if you "unstore" immediately after the change.</div> <div id="sig692743" class="signature"><div style="text-align:center">Speak softly, and carry <a class="postlink" href="//wiki.wesnoth.org/LotI_Items#Doombringer_.E2.80.93_sword">Doombringer</a>.</div></div> </div> </div> <div class="back2top"> <a href="#top" class="top" title="Top"> <i class="icon fa-chevron-circle-up fa-fw icon-gray" aria-hidden="true"></i> <span class="sr-only">Top</span> </a> </div> </div> </div> <div id="p692753" class="post has-profile bg1"> <div class="inner"> <dl class="postprofile" id="profile692753"> <dt class="has-profile-rank has-avatar"> <div class="avatar-container"> <a href="./../memberlist.php?mode=viewprofile&u=131665&sid=82a90fbf901ae9eb044287746a6cfc34" class="avatar"><img class="avatar" src="./../download/file.php?avatar=131665_1344050688.png" width="100" height="100" alt="User avatar" /></a> </div> <a href="./../memberlist.php?mode=viewprofile&u=131665&sid=82a90fbf901ae9eb044287746a6cfc34" style="color: #D52929;" class="username-coloured">Celtic_Minstrel</a> </dt> <dd class="profile-rank">Developer</dd> <dd class="profile-posts"><strong>Posts:</strong> <a href="./../search.php?author_id=131665&sr=posts&sid=82a90fbf901ae9eb044287746a6cfc34">2347</a></dd> <dd class="profile-joined"><strong>Joined:</strong> August 3rd, 2012, 11:26 pm</dd> <dd class="profile-custom-field profile-phpbb_location"><strong>Location:</strong> Canada</dd> <dd class="profile-contact"> <strong>Contact:</strong> <div class="dropdown-container dropdown-left"> <a href="#" class="dropdown-trigger" title="Contact Celtic_Minstrel"> <i class="icon fa-commenting-o fa-fw icon-lg" aria-hidden="true"></i><span class="sr-only">Contact Celtic_Minstrel</span> </a> <div class="dropdown"> <div class="pointer"><div class="pointer-inner"></div></div> <div class="dropdown-contents contact-icons"> <div> <a href="http://pentalithia.ca/blog/" title="Website"> <span class="contact-icon phpbb_website-icon">Website</span> </a> <a href="skype:celticminstrek?userinfo" title="Skype"> <span class="contact-icon phpbb_skype-icon">Skype</span> </a> <a href="http://twitter.com/Celtic_Minstrel" title="Twitter" class="last-cell"> <span class="contact-icon phpbb_twitter-icon">Twitter</span> </a> </div> </div> </div> </div> </dd> </dl> <div class="postbody"> <div id="post_content692753"> <h3 > <a href="./../viewtopic.php?p=692753&sid=82a90fbf901ae9eb044287746a6cfc34#p692753">Re: wml.get_child for unit</a> </h3> <ul class="post-buttons"> <li> <a href="./../posting.php?mode=quote&p=692753&sid=82a90fbf901ae9eb044287746a6cfc34" title="Reply with quote" class="button button-icon-only"> <i class="icon fa-quote-left fa-fw" aria-hidden="true"></i><span class="sr-only">Quote</span> </a> </li> </ul> <p class="author"> <a class="unread" href="./../viewtopic.php?p=692753&sid=82a90fbf901ae9eb044287746a6cfc34#p692753" title="Post"> <i class="icon fa-file fa-fw icon-lightgray icon-md" aria-hidden="true"></i><span class="sr-only">Post</span> </a> <span class="responsive-hide">by <strong><a href="./../memberlist.php?mode=viewprofile&u=131665&sid=82a90fbf901ae9eb044287746a6cfc34" style="color: #D52929;" class="username-coloured">Celtic_Minstrel</a></strong> » </span><time datetime="2024-08-22T23:21:24+00:00">August 22nd, 2024, 11:21 pm</time> </p> <div class="content"><blockquote cite="./../viewtopic.php?p=692737&sid=82a90fbf901ae9eb044287746a6cfc34#p692737"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=122117&sid=82a90fbf901ae9eb044287746a6cfc34">gnombat</a> wrote: <a href="./../viewtopic.php?p=692737&sid=82a90fbf901ae9eb044287746a6cfc34#p692737" data-post-id="692737" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 6:05 pm</span></cite> It doesn't? (Did you see the <code class="inline-code">.__cfg</code> at the end of the first line?) </div></blockquote> Ah, you're right, I did indeed miss that… which means <em class="text-italics">both</em> versions result in no actual change to the unit.<br> <blockquote cite="./../viewtopic.php?p=692743&sid=82a90fbf901ae9eb044287746a6cfc34#p692743"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34">white_haired_uncle</a> wrote: <a href="./../viewtopic.php?p=692743&sid=82a90fbf901ae9eb044287746a6cfc34#p692743" data-post-id="692743" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 7:44 pm</span></cite> Now, as I understand it, that's two copies of Bob serialized and stored in completely separate tables (and if this is true, I believe it confirms my suspicion that .__cfg is not a table, it RETURNS a table). No changes to a will affect b, and nothing I do to a or b will affect Bob until I "unstore" a or b. </div></blockquote>Correct.<br> <blockquote cite="./../viewtopic.php?p=692743&sid=82a90fbf901ae9eb044287746a6cfc34#p692743"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34">white_haired_uncle</a> wrote: <a href="./../viewtopic.php?p=692743&sid=82a90fbf901ae9eb044287746a6cfc34#p692743" data-post-id="692743" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 7:44 pm</span></cite> Here's where it gets interesting:<br> <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>u = wesnoth.units.find_on_map({id = Bob})[1] print(u.__cfg.hitpoints) ==> 24 u.__cfg.hitpoints=12 print(u.__cfg.hitpoints) ==> ???</code></pre></div> I would have thought the second print would print 12. But if every access to .__cfg serializes from the unit (Bob), and I've done nothing here to change Bob, then I guess it would print 24. </div></blockquote><code class="inline-code">__cfg</code> is read-only. It's a little unfortunate that Lua allows you to modify its members anyway, but that won't do anything, as what you're modifying is just a temporary copy of the table.<br> <blockquote cite="./../viewtopic.php?p=692743&sid=82a90fbf901ae9eb044287746a6cfc34#p692743"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34">white_haired_uncle</a> wrote: <a href="./../viewtopic.php?p=692743&sid=82a90fbf901ae9eb044287746a6cfc34#p692743" data-post-id="692743" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 22nd, 2024, 7:44 pm</span></cite> My gut is telling me the second code block is either just stupid, or making a change this way will only work if you "unstore" immediately after the change. </div></blockquote>Making a change this way will <em class="text-italics">never</em> work. You need to store <code class="inline-code">__cfg</code> in a variable (which includes passing it to a function), otherwise any changes to it will be immediately lost.</div> <div id="sig692753" class="signature">Author of <a href="http://r.wesnoth.org/t37342" class="postlink">The Black Cross of Aleron</a> campaign and <a href="http://r.wesnoth.org/t37417" class="postlink">Default++</a> era.<br> Former maintainer of <a href="http://r.wesnoth.org/t26527" class="postlink">Steelhive</a>.</div> </div> </div> <div class="back2top"> <a href="#top" class="top" title="Top"> <i class="icon fa-chevron-circle-up fa-fw icon-gray" aria-hidden="true"></i> <span class="sr-only">Top</span> </a> </div> </div> </div> <div id="p692754" class="post has-profile bg2"> <div class="inner"> <dl class="postprofile" id="profile692754"> <dt class="no-profile-rank has-avatar"> <div class="avatar-container"> <a href="./../memberlist.php?mode=viewprofile&u=141214&sid=82a90fbf901ae9eb044287746a6cfc34" class="avatar"><img class="avatar" src="./../download/file.php?avatar=141214_1654827317.png" width="72" height="72" alt="User avatar" /></a> </div> <a href="./../memberlist.php?mode=viewprofile&u=141214&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">hermestrismi</a> </dt> <dd class="profile-posts"><strong>Posts:</strong> <a href="./../search.php?author_id=141214&sr=posts&sid=82a90fbf901ae9eb044287746a6cfc34">717</a></dd> <dd class="profile-joined"><strong>Joined:</strong> February 6th, 2016, 11:28 pm</dd> <dd class="profile-custom-field profile-phpbb_location"><strong>Location:</strong> Tunisia</dd> <dd class="profile-contact"> <strong>Contact:</strong> <div class="dropdown-container dropdown-left"> <a href="#" class="dropdown-trigger" title="Contact hermestrismi"> <i class="icon fa-commenting-o fa-fw icon-lg" aria-hidden="true"></i><span class="sr-only">Contact hermestrismi</span> </a> <div class="dropdown"> <div class="pointer"><div class="pointer-inner"></div></div> <div class="dropdown-contents contact-icons"> <div> <a href="http://facebook.com/mejri.ziad.1/" title="Facebook" class="last-cell"> <span class="contact-icon phpbb_facebook-icon">Facebook</span> </a> </div> </div> </div> </div> </dd> </dl> <div class="postbody"> <div id="post_content692754"> <h3 > <a href="./../viewtopic.php?p=692754&sid=82a90fbf901ae9eb044287746a6cfc34#p692754">Re: wml.get_child for unit</a> </h3> <ul class="post-buttons"> <li> <a href="./../posting.php?mode=quote&p=692754&sid=82a90fbf901ae9eb044287746a6cfc34" title="Reply with quote" class="button button-icon-only"> <i class="icon fa-quote-left fa-fw" aria-hidden="true"></i><span class="sr-only">Quote</span> </a> </li> </ul> <p class="author"> <a class="unread" href="./../viewtopic.php?p=692754&sid=82a90fbf901ae9eb044287746a6cfc34#p692754" title="Post"> <i class="icon fa-file fa-fw icon-lightgray icon-md" aria-hidden="true"></i><span class="sr-only">Post</span> </a> <span class="responsive-hide">by <strong><a href="./../memberlist.php?mode=viewprofile&u=141214&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">hermestrismi</a></strong> » </span><time datetime="2024-08-23T05:41:59+00:00">August 23rd, 2024, 5:41 am</time> </p> <div class="content">hi, <br> a quick <em class="text-italics"> stupid </em> question. I want to build a wml array (like append variables) like that: <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>[set_variables] mode=append name=unit_items_pair [literal] id=Blood Bat-20 item=sword2 [/literal] ... [/variables] </code></pre></div> what's the best way to do that? the ways I tried ( <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>wml.array_access_set </code></pre></div> <br> and <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>wml.variables </code></pre></div> didn't build an append array</div> <div id="sig692754" class="signature"><a href="https://forums.wesnoth.org/viewtopic.php?p=646876#p646876" class="postlink">The Dark Master</a>, <a href="https://forums.wesnoth.org/viewtopic.php?p=673570#p673570" class="postlink">The Dark Hordes (Unofficial version)</a>,<a href="https://forums.wesnoth.org/viewtopic.php?t=55629" class="postlink"> Return of the Legion </a>, <a href="https://forums.wesnoth.org/viewtopic.php?t=55729" class="postlink">Eternal Kingdom</a>, <a href="https://forums.wesnoth.org/viewtopic.php?t=55743" class="postlink">An Elvish Scout</a>,<a href="https://forums.wesnoth.org/viewtopic.php?t=55793" class="postlink">Unrest in Elfland</a> ,<a href="https://forums.wesnoth.org/viewtopic.php?t=55954" class="postlink"> Hidden War </a>...<br> <a href="https://forums.wesnoth.org/viewtopic.php?p=673686#p673686" class="postlink">The Dark Master Project</a>, Arabic tra. maintainer <br> "But he loves you" G. Carlin</div> </div> </div> <div class="back2top"> <a href="#top" class="top" title="Top"> <i class="icon fa-chevron-circle-up fa-fw icon-gray" aria-hidden="true"></i> <span class="sr-only">Top</span> </a> </div> </div> </div> <div id="p692755" class="post has-profile bg1"> <div class="inner"> <dl class="postprofile" id="profile692755"> <dt class="no-profile-rank no-avatar"> <div class="avatar-container"> </div> <a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">white_haired_uncle</a> </dt> <dd class="profile-posts"><strong>Posts:</strong> <a href="./../search.php?author_id=165464&sr=posts&sid=82a90fbf901ae9eb044287746a6cfc34">1449</a></dd> <dd class="profile-joined"><strong>Joined:</strong> August 26th, 2018, 11:46 pm</dd> <dd class="profile-custom-field profile-phpbb_location"><strong>Location:</strong> A country place, far outside the Wire</dd> </dl> <div class="postbody"> <div id="post_content692755"> <h3 > <a href="./../viewtopic.php?p=692755&sid=82a90fbf901ae9eb044287746a6cfc34#p692755">Re: wml.get_child for unit</a> </h3> <ul class="post-buttons"> <li> <a href="./../posting.php?mode=quote&p=692755&sid=82a90fbf901ae9eb044287746a6cfc34" title="Reply with quote" class="button button-icon-only"> <i class="icon fa-quote-left fa-fw" aria-hidden="true"></i><span class="sr-only">Quote</span> </a> </li> </ul> <p class="author"> <a class="unread" href="./../viewtopic.php?p=692755&sid=82a90fbf901ae9eb044287746a6cfc34#p692755" title="Post"> <i class="icon fa-file fa-fw icon-lightgray icon-md" aria-hidden="true"></i><span class="sr-only">Post</span> </a> <span class="responsive-hide">by <strong><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">white_haired_uncle</a></strong> » </span><time datetime="2024-08-23T09:52:28+00:00">August 23rd, 2024, 9:52 am</time> </p> <div class="content">wml.array_access.get and wml.array_access.set are used to convert WML arrays to/from lua tables.<br> <br> Generally, you'll use table.insert to append to a lua table. <a href="https://www.lua.org/pil/19.2.html" class="postlink">https://www.lua.org/pil/19.2.html</a><br> <br> WML and I don't get along well, but I think this is close to what you want:<br> <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>local a=wml.array_access.get("unit_items_pair") b["id]="Blood Bat-20" b["item"]="sword" table.insert(a,b) print(a[#a].item) ==> "Blood Bat-20" wml.array_access.set("unit_items_pair",a)</code></pre></div></div> <div id="sig692755" class="signature"><div style="text-align:center">Speak softly, and carry <a class="postlink" href="//wiki.wesnoth.org/LotI_Items#Doombringer_.E2.80.93_sword">Doombringer</a>.</div></div> </div> </div> <div class="back2top"> <a href="#top" class="top" title="Top"> <i class="icon fa-chevron-circle-up fa-fw icon-gray" aria-hidden="true"></i> <span class="sr-only">Top</span> </a> </div> </div> </div> <div id="p692756" class="post has-profile bg2"> <div class="inner"> <dl class="postprofile" id="profile692756"> <dt class="no-profile-rank has-avatar"> <div class="avatar-container"> <a href="./../memberlist.php?mode=viewprofile&u=141214&sid=82a90fbf901ae9eb044287746a6cfc34" class="avatar"><img class="avatar" src="./../download/file.php?avatar=141214_1654827317.png" width="72" height="72" alt="User avatar" /></a> </div> <a href="./../memberlist.php?mode=viewprofile&u=141214&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">hermestrismi</a> </dt> <dd class="profile-posts"><strong>Posts:</strong> <a href="./../search.php?author_id=141214&sr=posts&sid=82a90fbf901ae9eb044287746a6cfc34">717</a></dd> <dd class="profile-joined"><strong>Joined:</strong> February 6th, 2016, 11:28 pm</dd> <dd class="profile-custom-field profile-phpbb_location"><strong>Location:</strong> Tunisia</dd> <dd class="profile-contact"> <strong>Contact:</strong> <div class="dropdown-container dropdown-left"> <a href="#" class="dropdown-trigger" title="Contact hermestrismi"> <i class="icon fa-commenting-o fa-fw icon-lg" aria-hidden="true"></i><span class="sr-only">Contact hermestrismi</span> </a> <div class="dropdown"> <div class="pointer"><div class="pointer-inner"></div></div> <div class="dropdown-contents contact-icons"> <div> <a href="http://facebook.com/mejri.ziad.1/" title="Facebook" class="last-cell"> <span class="contact-icon phpbb_facebook-icon">Facebook</span> </a> </div> </div> </div> </div> </dd> </dl> <div class="postbody"> <div id="post_content692756"> <h3 > <a href="./../viewtopic.php?p=692756&sid=82a90fbf901ae9eb044287746a6cfc34#p692756">Re: wml.get_child for unit</a> </h3> <ul class="post-buttons"> <li> <a href="./../posting.php?mode=quote&p=692756&sid=82a90fbf901ae9eb044287746a6cfc34" title="Reply with quote" class="button button-icon-only"> <i class="icon fa-quote-left fa-fw" aria-hidden="true"></i><span class="sr-only">Quote</span> </a> </li> </ul> <p class="author"> <a class="unread" href="./../viewtopic.php?p=692756&sid=82a90fbf901ae9eb044287746a6cfc34#p692756" title="Post"> <i class="icon fa-file fa-fw icon-lightgray icon-md" aria-hidden="true"></i><span class="sr-only">Post</span> </a> <span class="responsive-hide">by <strong><a href="./../memberlist.php?mode=viewprofile&u=141214&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">hermestrismi</a></strong> » </span><time datetime="2024-08-23T09:56:42+00:00">August 23rd, 2024, 9:56 am</time> </p> <div class="content"><blockquote cite="./../viewtopic.php?p=692755&sid=82a90fbf901ae9eb044287746a6cfc34#p692755"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34">white_haired_uncle</a> wrote: <a href="./../viewtopic.php?p=692755&sid=82a90fbf901ae9eb044287746a6cfc34#p692755" data-post-id="692755" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 23rd, 2024, 9:52 am</span></cite> wml.array_access.get and wml.array_access.set are used to convert WML arrays to/from lua tables.<br> <br> Generally, you'll use table.insert to append to a lua table. <a href="https://www.lua.org/pil/19.2.html" class="postlink">https://www.lua.org/pil/19.2.html</a><br> <br> WML and I don't get along well, but I think this is close to what you want:<br> <div class="codebox"><p>Code: <a href="#" onclick="selectCode(this); return false;">Select all</a></p><pre><code>local a=wml.array_access.get("unit_items_pair") b["id]="Blood Bat-20" b["item"]="sword" table.insert(a,b) print(a[#a].item) ==> "Blood Bat-20" wml.array_access.set("unit_items_pair",a)</code></pre></div> </div></blockquote> thanks. I'll try it. may I ask if this is the best way to serialize a table (so that it became surely persistent upon reload)?</div> <div id="sig692756" class="signature"><a href="https://forums.wesnoth.org/viewtopic.php?p=646876#p646876" class="postlink">The Dark Master</a>, <a href="https://forums.wesnoth.org/viewtopic.php?p=673570#p673570" class="postlink">The Dark Hordes (Unofficial version)</a>,<a href="https://forums.wesnoth.org/viewtopic.php?t=55629" class="postlink"> Return of the Legion </a>, <a href="https://forums.wesnoth.org/viewtopic.php?t=55729" class="postlink">Eternal Kingdom</a>, <a href="https://forums.wesnoth.org/viewtopic.php?t=55743" class="postlink">An Elvish Scout</a>,<a href="https://forums.wesnoth.org/viewtopic.php?t=55793" class="postlink">Unrest in Elfland</a> ,<a href="https://forums.wesnoth.org/viewtopic.php?t=55954" class="postlink"> Hidden War </a>...<br> <a href="https://forums.wesnoth.org/viewtopic.php?p=673686#p673686" class="postlink">The Dark Master Project</a>, Arabic tra. maintainer <br> "But he loves you" G. Carlin</div> </div> </div> <div class="back2top"> <a href="#top" class="top" title="Top"> <i class="icon fa-chevron-circle-up fa-fw icon-gray" aria-hidden="true"></i> <span class="sr-only">Top</span> </a> </div> </div> </div> <div id="p692757" class="post has-profile bg1"> <div class="inner"> <dl class="postprofile" id="profile692757"> <dt class="no-profile-rank no-avatar"> <div class="avatar-container"> </div> <a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">white_haired_uncle</a> </dt> <dd class="profile-posts"><strong>Posts:</strong> <a href="./../search.php?author_id=165464&sr=posts&sid=82a90fbf901ae9eb044287746a6cfc34">1449</a></dd> <dd class="profile-joined"><strong>Joined:</strong> August 26th, 2018, 11:46 pm</dd> <dd class="profile-custom-field profile-phpbb_location"><strong>Location:</strong> A country place, far outside the Wire</dd> </dl> <div class="postbody"> <div id="post_content692757"> <h3 > <a href="./../viewtopic.php?p=692757&sid=82a90fbf901ae9eb044287746a6cfc34#p692757">Re: wml.get_child for unit</a> </h3> <ul class="post-buttons"> <li> <a href="./../posting.php?mode=quote&p=692757&sid=82a90fbf901ae9eb044287746a6cfc34" title="Reply with quote" class="button button-icon-only"> <i class="icon fa-quote-left fa-fw" aria-hidden="true"></i><span class="sr-only">Quote</span> </a> </li> </ul> <p class="author"> <a class="unread" href="./../viewtopic.php?p=692757&sid=82a90fbf901ae9eb044287746a6cfc34#p692757" title="Post"> <i class="icon fa-file fa-fw icon-lightgray icon-md" aria-hidden="true"></i><span class="sr-only">Post</span> </a> <span class="responsive-hide">by <strong><a href="./../memberlist.php?mode=viewprofile&u=165464&sid=82a90fbf901ae9eb044287746a6cfc34" class="username">white_haired_uncle</a></strong> » </span><time datetime="2024-08-23T10:09:59+00:00">August 23rd, 2024, 10:09 am</time> </p> <div class="content"><blockquote cite="./../viewtopic.php?p=692756&sid=82a90fbf901ae9eb044287746a6cfc34#p692756"><div><cite><a href="./../memberlist.php?mode=viewprofile&u=141214&sid=82a90fbf901ae9eb044287746a6cfc34">hermestrismi</a> wrote: <a href="./../viewtopic.php?p=692756&sid=82a90fbf901ae9eb044287746a6cfc34#p692756" data-post-id="692756" onclick="if(document.getElementById(hash.substr(1)))href=hash">↑</a><span class="responsive-hide">August 23rd, 2024, 9:56 am</span></cite> <br> thanks. I'll try it. may I ask if this is the best way to serialize a table (so that it became surely persistent upon reload)? </div></blockquote> Best? I don't know. It's how I do it.<br> <br> There's also<br> <br> <a href="https://wiki.wesnoth.org/LuaAPI/wesnoth#wesnoth.persistent_tags" class="postlink">https://wiki.wesnoth.org/LuaAPI/wesnoth ... stent_tags</a><br> <br> but I've never used it.</div> <div id="sig692757" class="signature"><div style="text-align:center">Speak softly, and carry <a class="postlink" href="//wiki.wesnoth.org/LotI_Items#Doombringer_.E2.80.93_sword">Doombringer</a>.</div></div> </div> </div> <div class="back2top"> <a href="#top" class="top" title="Top"> <i class="icon fa-chevron-circle-up fa-fw icon-gray" aria-hidden="true"></i> <span class="sr-only">Top</span> </a> </div> </div> </div> <div class="action-bar bar-bottom"> <a href="./../posting.php?mode=reply&t=58564&sid=82a90fbf901ae9eb044287746a6cfc34" class="button" title="Post a reply"> <span>Post Reply</span> <i class="icon fa-reply fa-fw" aria-hidden="true"></i> </a> <form method="post" action="./../viewtopic.php?t=58564&start=15&sid=82a90fbf901ae9eb044287746a6cfc34"> 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[solved] wml.get_child for unit - Page 2 - The Battle for Wesnoth Forums