.match function not found

The Aaron in a post created exactly what I need: <a href="https://app.roll20.net/forum/post/6659598/simulate-a-for-each-loop-to-create-a-roll-query-of-all-the-items-in-a-repeating-row" rel="nofollow">https://app.roll20.net/forum/post/6659598/simulate-a-for-each-loop-to-create-a-roll-query-of-all-the-items-in-a-repeating-row</a> I tried to use this great idea but I always receive an error on the .match function (&nbsp;.match is not a function). I tried several solutions, but no way, match exists for String variables I created, but not in the one I need to use. Any suggestion? Thank you in advance

Just for making the debug easier, without searching around, a function is created for getting an array of weapons: const getRepeating Rows ForCharacter = (charID, repeatingName) =&gt; { const matcher = new RegExp(`^repeating_${repeatingName}_(-[^_]+)_`,'i'); return findObjs({ type: 'attribute', characterid: charID }).filter((a)=&gt;matcher.test(a.get('name'))) .reduce((m,a)=&gt;{ let match = matcher.match(a.get('name')); m[match[1]]=m[match[1]]||[]; m[match[1]].push(a); return m; },{}); }; And it is called by a function (mine will be different, but better to start having a working function): on('chat:message', (msg) =&gt; { &nbsp; &nbsp; //log(msg); &nbsp; &nbsp; if('api' === msg.type){ &nbsp; &nbsp; &nbsp; &nbsp; let args = msg.content.split(/\s+/); &nbsp; &nbsp; &nbsp; &nbsp; let character = findObjs({type: 'character', name: args[1]})[0]; &nbsp; &nbsp; &nbsp; &nbsp; if(character){ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; let weapons = getRepeatingForCharacter(character.id,'attack'); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; let query = `?{Which weapon|${Object.keys(weapons).map(id =&gt; { &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; let nameAttr = weapons[id].find(a =&gt; /_name/i.test(a.get('name'))); &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return `${nameAttr.get('current')},%{${character.name}|repeating_weapons_${id}_WeaponCheck}`; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }).join('|')}}`; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; sendChat('SYSTEM', '/w ' + character.name + ' ' + query); &nbsp; &nbsp; &nbsp; &nbsp; } else { &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; sendChat('SYSTEM', '/w ' + msg.who + ' Invalid player'); &nbsp; &nbsp; &nbsp; &nbsp; } &nbsp; &nbsp; } }); const getRepeatingForCharacter = (charID, repeatingName) =&gt; { const matcher = new RegExp(`^repeating_${repeatingName}_-[^_]+_WeaponName`,'i'); return findObjs({ type: 'attribute', characterid: charID }).filter((a)=&gt;matcher.test(a.get('name'))); };

Whoops!&nbsp; That's got a bug in it.&nbsp; Should be: const getRepeatingRowsForCharacter = (charID, repeatingName) =&gt; { const matcher = new RegExp(`^repeating_${repeatingName}_(-[^_]+)_`,'i'); return findObjs({ type: 'attribute', characterid: charID }).filter((a)=&gt;matcher.test(a.get('name'))) .reduce((m,a)=&gt;{ let match = a.get('name').match(matcher); m[match[1]]=m[match[1]]||[]; m[match[1]].push(a); return m; },{}); };

(edited)

Thank you very much for the answer! I understand it a little bit better now and no "critical" errors occurred. Now I get a kind of an array, but undefined (I copy just the beginning): {"undefined":[{"name":"repeating_weapons_-M4Yh2eFaDFBWl8B-Zzw_weaponname","current": BTW: I have to study the regular expressions, they look amazing!

Try putting this in after the let match= line and see what gets logged: log(match); Paste it back here and we can figure out what the issue is.

match works: ["repeating_weapons_-M4Yh2eFaDFBWl8B-Zzw_weaponname"] ["repeating_weapons_-M4Yh7iWFrL8nUu0-sbW_weaponname"] ["repeating_weapons_-M4t96CwNB42iJJVjZ9L_weaponname"] ["repeating_weapons_-M4t98aBUBLI-Lz1NCcb_weaponname"] ["repeating_weapons_-M4t9AQ3YK5DW2ZV4cEd_weaponname"] but the returned value is: {" undefined ":[{"name":"repeating_weapons_-M4Yh2eFaDFBWl8B-Zzw_weaponname","current":"Spadone a due mani","max":"","_id":"-M4Yh45Kg96Tkw-NdtZy","_type":"attribute","_characterid":"-M4YgQPT1BO6mUphEVe-"},{"name":"repeating_weapons_-M4Yh7iWFrL8nUu0-sbW_weaponname","current":"Arco Lungo","max":"","_id":"-M4Yh8qMF91ArPwsOXfK","_type":"attribute","_characterid":"-M4YgQPT1BO6mUphEVe-"},{"name":"repeating_weapons_-M4t96CwNB42iJJVjZ9L_weaponname","current":"Artiglio2 ","max":"","_id":"-M4t98KzU-f1h2X_zBHH","_type":"attribute","_characterid":"-M4YgQPT1BO6mUphEVe-"},{"name":"repeating_weapons_-M4t98aBUBLI-Lz1NCcb_weaponname","current":"Artiglio3 ","max":"","_id":"-M4t9A8YlH2zRcXybiKm","_type":"attribute","_characterid":"-M4YgQPT1BO6mUphEVe-"},{"name":"repeating_weapons_-M4t9AQ3YK5DW2ZV4cEd_weaponname","current":"Artiglio4 ","max":"","_id":"-M4t9C-J16RMFQ8aCx4O","_type":"attribute","_characterid":"-M4YgQPT1BO6mUphEVe-"}]}

That's really bizarre. I'll have to try it tonight in the api.&nbsp; I tried a quick version in a javascript console and it worked right for the above names.&nbsp; For some reason, it seems like the capturing group isn't capturing in the API.

No idea. Thank you very much for your help. The problem is intriguing me, but I am not sure I am currently understanding the "reduce" part (not the idea, the implementation). I am trying another solution, less elegant but that I'm able to understand. Looks working: this.getRep = function(charID,repGroup,repName) { var character, weaponIDs; character = getObj('character', charID); &nbsp;&nbsp;&nbsp;&nbsp;weaponIDs = filterObjs(function(obj) { &nbsp;&nbsp;&nbsp;&nbsp;if(obj.get("type") === 'attribute' &amp;&amp; obj.get('characterid') === character.id &amp;&amp; (obj.get('name').indexOf(repGroup) &gt; -1) &amp;&amp; (obj.get('name').indexOf('_'+repName) &gt; -1)) return true; else return false; &nbsp;&nbsp;&nbsp;&nbsp;}); return(weaponIDs); } P.S. It is a member or my "utility" class, I made it generic for all my repeating items, for this reason I have more parameters

Hmm... I just tried this in one of my own games and it worked fine.&nbsp; Very weird..

No idea, but I saw strange things while learning how to code in roll20, but I must admit that I've never programmed in Java before and I'm no longer a developer since... mmm, about 2001, I'm quite rusty :) Thank you for your answers and for showing me the existence of regular expression I've never used before.&nbsp;

No problem!&nbsp; When you're looking for more information on it, it's Java SCRIPT . It shares some minor syntactical elements with Java, but is completely different in most ways.&nbsp; Annoying that the names are so similar, but that's what we've got. =D&nbsp; &nbsp;It's also called ECMAScript officially, which is were various standards like ES6 and ES2017 get their ES from.