markgojs

<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>GoJS® List Class</title> <script src="../../assets/js/jquery.min.js"></script> <script src="../../assets/js/bootstrap.min.js"></script> <script src="../../assets/js/highlight.js"></script> <script src="../../assets/js/api.js"></script> <script src="../../assets/js/fuse.min.js"></script> <link href="../../assets/css/bootstrap.min.css" rel="stylesheet" >  <link href="../../assets/css/main.css" rel="stylesheet" type="text/css"/> <link href="../../assets/css/api.css" rel="stylesheet" type="text/css"/>  <link rel="stylesheet" href="../../assets/css/highlight.css" type="text/css" media="all" /> </head> <body>  <nav id="non-fixed-nav" class="navbar navbar-inverse navbar-top"> <div class="container-fluid"> <div class="navbar-header"> <div class="navheader-container"> <div class="navheader-collapse" data-toggle="collapse" data-target="#navbar"> <a id="toplogo" 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data-target="#CollectionNavbar"> <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#CollectionNavbar"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> </div> <span class="navbar-brand">Collection Classes</span> </div> </div> <div id="CollectionNavbar" class="navbar-collapse collapse sidebar-navbar-collapse"> <ul class="classList nav navbar-nav"> <li><a href="../symbols/Iterable.html" class="linkConstructor">Iterable</a></li> <li><a href="../symbols/Iterator.html" class="linkConstructor">Iterator</a></li> <li><a href="../symbols/List.html" class="linkConstructor">List</a></li> <li><a href="../symbols/Map.html" class="linkConstructor">Map</a></li> <li><a href="../symbols/Set.html" class="linkConstructor">Set</a></li> </ul> </div> </div> </div>   </div> <div id="contentBody" class="col-md-10"> <div class="searchsumm"> <div class="table-wrap"> <div class="table-cell" id="apisearch" data-base="../"> <div class="title">Search API</div> <div class="field"> <label for="search-field" class="search-icon"></label> <input id="search-field" type="text" /> </div> <ul class="results"> <li class="state loading">Preparing search index...</li> <li class="state failure">The search index is not available</li> </ul> </div> <div class="table-cell" id="apisumm"> <input type="checkbox" id="showsumms" /> <label class="apisumms" for="showsumms">Show Summaries</label> </div> </div> </div>  <div id="header" class="fineprint"> <b>GoJS</b>® Diagramming Components<br/>version 1.8.36 for JavaScript/HTML<br/>by <a href="https://www.nwoods.com/">Northwoods Software®</a> </div>  <h2 class="classTitle"> Class List </h2>  <p class="classsummary"> An ordered iterable collection. It optionally enforces the type of elements that may be added to the List. <p> An example usage: <pre> var list = new go.List(go.Point); // make a list of Points list.add(new go.Point(0, 0)); list.add(new go.Point(20, 10)); list.add(new go.Point(10, 20)); // now list.length === 3 // and list.elt(1) instanceof go.Point </pre> <p> You can iterate over the items in a List: <pre> var it = aList.iterator; while (it.next()) { window.console.log("#" + it.key + " is " + it.value); } </pre> Or: <pre> aList.each(function(val) { window.console.log(val); }); </pre> The key will range from zero to <a href="../symbols/List.html#count" class="linkProperty">count</a>-1. <p> For convenience this <b>GoJS</b> List class has synonyms for the following methods and property: <ul> <li><b>get(idx)</b>: <a href="../symbols/List.html#elt" class="linkMethod">elt</a></li> <li><b>set(idx,val)</b>: <a href="../symbols/List.html#setElt" class="linkMethod">setElt</a></li> <li><b>has(val)</b>: <a href="../symbols/List.html#contains" class="linkMethod">contains</a></li> <li><b>delete(val)</b>: <a href="../symbols/List.html#remove" class="linkMethod">remove</a></li> <li><b>clear()</b>: <a href="../symbols/List.html#clear" class="linkMethod">clear</a></li> <li><b>size</b>: <a href="../symbols/List.html#count" class="linkProperty">count</a></li> </ul> </p>  <h2 id="constructor" class="summaryCaption"> Constructor <span class="nodetails"> Summary</span><span class="details"> Details</span></h2> <div class="table-responsive"> <table class="summaryTable table table-bordered table-condensed" summary="A summary of the constructor documented in the class List."> <thead> <tr> <th scope="col" class="name">Name</th> <th scope="col" class="description">Description</th> </tr> </thead> <tbody> <tr> <td class="name" > <div class="name"> List(type) </div> </td> <td class="description"> <div class="description"> <p><p>There are three possible constructors: List(), List(string) where string is a primitive type ('number', 'string', 'boolean', or 'function'), or List(func) where func is a class function/constructor, such as <a href="../symbols/GraphObject.html" class="linkConstructor">GraphObject</a>.<span class="nodetails" id="xconList"><a class="morelink" onclick="hst('conList')">More...</a></span> <span class="details" id="conList"> </span><div class="details" id="dconList"><p> Typical usage would be something like: <pre> var list = new go.List(go.GraphObject); // keep a list of GraphObjects </pre></div> <dl class="detailList"> <dt class="heading">Parameters:</dt> <dt> <span class="light fixedFont">{Function|string|null=}</span> <b>type</b> </dt> <dd>Optional class type (constructor) or a string describing a primitive type. 'string', 'number', 'boolean', and 'function' are accepted primitive types.</dd> </dl> </div> </td> </tr> </tbody> </table> </div>  <h2 class="summaryCaption">Properties<span class="nodetails"> Summary</span><span class="details"> Details</span></h2> <div class="table-responsive"> <table class="summaryTable table table-bordered table-condensed" summary="A summary of the properties documented in the class List."> <thead> <tr> <th scope="col" class="name">Name, Value Type</th> <th scope="col" class="description">Description</th> </tr> </thead> <tbody> <tr id="count" > <td class="name"> <div class="name"> count </div> <div class="attributes"> <span class="light">{number}</span> </div> </td> <td class="description"> <div class="description">  <p>This read-only property is the length of the List. </div> </td> </tr> <tr id="iterator" > <td class="name"> <div class="name"> iterator </div> <div class="attributes"> <span class="light">{Iterator.<T>}</span> </div> </td> <td class="description"> <div class="description">  <p>Gets an object that you can use for iterating over the List.<span class="nodetails" id="xpropiterator"><a class="morelink" onclick="hst('propiterator')">More...</a></span> <span class="details" id="propiterator"> The key will be an integer from zero to the count-1. The value will be the item at that index in the list. Typical usage: <pre> var it = aList.iterator; while (it.next()) { . . . "index: " + it.key + " value: " + it.value . . . } </pre></span> </div> </td> </tr> <tr id="iteratorBackwards" > <td class="name"> <div class="name"> iteratorBackwards </div> <div class="attributes"> <span class="light">{Iterator.<T>}</span> </div> </td> <td class="description"> <div class="description">  <p>Gets an object that you can use for iterating over the List in backwards order.<span class="nodetails" id="xpropiteratorBackwards"><a class="morelink" onclick="hst('propiteratorBackwards')">More...</a></span> <span class="details" id="propiteratorBackwards"> The key will be an integer from count-1 to zero. The value will be the item at that index in the list. The list is not modified by traversing in reverse order. Typical usage: <pre> var it = aList.iteratorBackwards; while (it.next()) { . . . 'key: ' + it.key + ' value: ' + it.value . . . } </pre></span> </div> </td> </tr> <tr id="length" > <td class="name"> <div class="name"> length </div> <div class="attributes"> <span class="light">{number}</span> </div> </td> <td class="description"> <div class="description">  <p>This read-only property is the length of the List, a synonym for the <a href="../symbols/List.html#count" class="linkProperty">count</a> property. </div> </td> </tr> </tbody> </table> </div>  <h2 class="summaryCaption">Method <span class="nodetails"> Summary</span><span class="details"> Details</span></h2> <div class="table-responsive"> <table class="summaryTable table table-bordered table-condensed" summary="A summary of the methods documented in the class List."> <thead> <tr> <th scope="col" class="name">Name, Return Type</th> <th scope="col" class="description">Description</th> </tr> </thead> <tbody> <tr id="add"> <td class="name"> <div class="name"> add(val) </div> <div class="attributes"> </div> </td> <td class="description"> <div class="description"> <p><p>Adds a given value to the end of the List.<span class="nodetails" id="xmethadd"><a class="morelink" onclick="hst('methadd')">More...</a></span> <span class="details" id="methadd"> </span><div class="details" id="dmethadd"><p> Be careful not to call this method while iterating over the collection.</div> <dl class="detailList"> <dt class="heading">Parameters:</dt> <dt> <span class="light fixedFont">{*}</span> <b>val</b> </dt> <dd></dd> </dl> </div> </td> </tr> <tr id="addAll"> <td class="name"> <div class="name"> addAll(coll) </div> <div class="attributes"> <span class="light">{List.<T>}</span> </div> </td> <td class="description"> <div class="description"> <p><p>Adds all of the values of a collection to the end of this List.<span class="nodetails" id="xmethaddAll"><a class="morelink" onclick="hst('methaddAll')">More...</a></span> <span class="details" id="methaddAll"> </span><div class="details" id="dmethaddAll"><p> Be careful not to call this method while iterating over the collection.</div> <dl class="detailList"> <dt class="heading">Parameters:</dt> <dt> <span class="light fixedFont">{Iterable.<T>|Array.<*>}</span> <b>coll</b> </dt> <dd>the collection of items to add.</dd> </dl> <dl class="detailList"> <dt class="heading">Returns:</dt> <dt><span class="light fixedFont">{List.<T>}</span> this List.</dt> </dl> </div> </td> </tr> <tr id="all"> <td class="name"> <div class="name"> all(pred) </div> <div class="attributes"> <span class="light">{boolean}</span> <span class="since" title="since">1.4</span> </div> </td> <td class="description"> <div class="description"> <p><p>This is true if all invocations of the given predicate on items in the collection are true.<span class="nodetails" id="xmethall"><a class="morelink" onclick="hst('methall')">More...</a></span> <span class="details" id="methall"> </span><div class="details" id="dmethall"><p> Call the given predicate on each item in the collection. As soon as a call returns false, this returns false. Otherwise this returns true. For an empty collection this returns true.</div> <dl class="detailList"> <dt class="heading">Parameters:</dt> <dt> <span class="light fixedFont">{function(T):boolean}</span> <b>pred</b> </dt> <dd>This function must not have any side-effects.</dd> </dl> <dl class="detailList"> <dt class="heading">Returns:</dt> <dt><span class="light fixedFont">{boolean}</span> True if all predicate calls are true; false otherwise.</dt> </dl> </div> </td> </tr> <tr id="any"> <td class="name"> <div class="name"> any(pred) </div> <div class="attributes"> <span class="light">{boolean}</span> <span class="since" title="since">1.4</span> </div> </td> <td class="description"> <div class="description"> <p><p>This is true if any invocation of the given predicate on items in the collection is true.<span class="nodetails" id="xmethany"><a class="morelink" onclick="hst('methany')">More...</a></span> <span class="details" id="methany"> </span><div class="details" id="dmethany"><p> Call the given predicate on each item in the collection. As soon as a call returns true, this returns true. Otherwise this returns false. For an empty collection this returns false.</div> <dl class="detailList"> <dt class="heading">Parameters:</dt> <dt> <span class="light fixedFont">{function(T):boolean}</span> <b>pred</b> </dt> <dd>This function must not have any side-effects.</dd> </dl> <dl class="detailList"> <dt class="heading">Returns:</dt> <dt><span class="light fixedFont">{boolean}</span> True if any predicate call is true; false otherwise.</dt> </dl> </div> </td> </tr> <tr id="clear"> <td class="name"> <div class="name"> clear() </div> <div class="attributes"> </div> </td> <td class="description"> <div class="description"> <p><p>Clears the List.<span class="nodetails" id="xmethclear"><a class="morelink" onclick="hst('methclear')">More...</a></span> <span class="details" id="methclear"> This sets the <a href="../symbols/List.html#count" class="linkProperty">count</a> to zero. </span><div class="details" id="dmethclear"><p> Be careful not to call this method while iterating over the collection.</div> </div> </td> </tr> <tr id="contains"> <td class="name"> <div class="name"> contains(val) </div> <div class="attributes"> <span class="light">{boolean}</span> </div> </td> <td class="description"> <div class="description"> <p><p>Returns whether the given value is in this List.<span class="nodetails" id="xmethcontains"><a class="morelink" onclick="hst('methcontains')">More...</a></span> <span class="details" id="methcontains"></span> <dl class="detailList"> <dt class="heading">Parameters:</dt> <dt> <span class="light fixedFont">{T}</span> <b>val</b> </dt> <dd>The value to check.</dd> </dl> <dl class="detailList"> <dt class="heading">Returns:</dt> <dt><span class="light fixedFont">{boolean}</span> Whether or not the value is contained within the List.</dt> </dl> </div> </td> </tr> <tr id="copy"> <td class="name"> <div class="name"> copy() </div> <div class="attributes"> <span class="light">{List.<T>}</span> </div> </td> <td class="description"> <div class="description"> <p><p>Makes a shallow copy of this List.<span class="nodetails" id="xmethcopy"><a class="morelink" onclick="hst('methcopy')">More...</a></span> <span class="details" id="methcopy"> The values are not copied, so if they are objects they may continue to be shared with the original List.</span> <dl class="detailList"> <dt class="heading">Returns:</dt> <dt><span class="light fixedFont">{List.<T>}</span> The new list.</dt> </dl> </div> </td> </tr> <tr id="each"> <td class="name"> <div class="name"> each(func) </div> <div class="attributes"> <span class="light">{List.<T>}</span> <span class="since" title="since">1.4</span> </div> </td> <td class="description"> <div class="description"> <p><p>Call the given function on each item in the collection.<span class="nodetails" id="xmetheach"><a class="morelink" onclick="hst('metheach')">More...</a></span> <span class="details" id="metheach"></span> <dl class="detailList"> <dt class="heading">Parameters:</dt> <dt> <span class="light fixedFont">{function(T)}</span> <b>func</b> </dt> <dd>This function must not modify the collection.</dd> </dl> <dl class="detailList"> <dt class="heading">Returns:</dt> <dt><span class="light fixedFont">{List.<T>}</span> this list itself</dt> </dl> </div> </td> </tr> <tr id="elt"> <td class="name"> <div class="name"> elt(i) </div> <div class="attributes"> <span class="light">{T}</span> </div> </td> <td class="description"> <div class="description"> <p><p>Returns the element at the given index.<span class="nodetails" id="xmethelt"><a class="morelink" onclick="hst('methelt')">More...</a></span> <span class="details" id="methelt"></span> <dl class="detailList"> <dt class="heading">Parameters:</dt> <dt> <span class="light fixedFont">{number}</span> <b>i</b> </dt> <dd>int The index of the element to return.</dd> </dl> <dl class="detailList"> <dt class="heading">Returns:</dt> <dt><span class="light fixedFont">{T}</span> the value at the given index.</dt> </dl> </div> </td> </tr> <tr id="first"> <td class="name"> <div class="name"> first() </div> <div class="attributes"> <span class="light">{T|null}</span> </div> </td> <td class="description"> <div class="description"> <p><p>Returns the first item in the list, or null if there is none. <dl class="detailList"> <dt class="heading">Returns:</dt> <dt><span class="light fixedFont">{T|null}</span> This returns null if there are no items in the list.</dt> </dl> </div> </td> </tr> <tr id="get"> <td class="name"> <div class="name"> get(i) </div> <div class="attributes"> <span class="light">{T}</span> </div> </td> <td class="description"> <div class="description"> <p><p>Returns the element at the given index.<span class="nodetails" id="xmethget"><a class="morelink" onclick="hst('methget')">More...</a></span> <span class="details" id="methget"></span> <dl class="detailList"> <dt class="heading">Par