gojs
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Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
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<b>GoJS</b>® Diagramming Components<br/>version 2.1.56<br/>by <a href="https://www.nwoods.com/">Northwoods Software®</a>
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<h1>Interface Iterator<T></h1>
</div>
</div>
</div>
</div>
</header>
<div class="tsd w-full max-w-screen-xl mx-auto pb-4">
<div class="row px-2 w-full">
<div class="col-8 col-content">
<section class="tsd-panel tsd-hierarchy">
<h3>Hierarchy</h3>
<ul class="tsd-hierarchy">
<li>
<a href="Iterable.html" class="tsd-signature-type" data-tsd-kind="Interface">Iterable</a><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type">T</span><span class="tsd-signature-symbol">></span>
<ul class="tsd-hierarchy">
<li>
<span class="target">Iterator</span>
</li>
</ul>
</li>
</ul>
</section>
<section class="tsd-panel tsd-comment">
<div class="tsd-comment tsd-typography">
<p>This interface defines properties and methods for iterating over a collection;
it provides the <a href="Iterator.html#next">next</a> predicate and the <a href="Iterator.html#value">value</a> read-only property.
Some Iterators also provide <code>key</code> property values along with each <code>value</code>.</p>
<p>Typical usage is:</p>
<pre><code class="language-js"><span style="color: #D4D4D4"> </span><span style="color: #569CD6">var</span><span style="color: #D4D4D4"> </span><span style="color: #9CDCFE">it</span><span style="color: #D4D4D4"> = </span><span style="color: #9CDCFE">anIterableCollection</span><span style="color: #D4D4D4">.</span><span style="color: #9CDCFE">iterator</span><span style="color: #D4D4D4">;</span>
<span style="color: #D4D4D4"> </span><span style="color: #C586C0">while</span><span style="color: #D4D4D4"> (</span><span style="color: #9CDCFE">it</span><span style="color: #D4D4D4">.</span><span style="color: #DCDCAA">next</span><span style="color: #D4D4D4">()) {</span>
<span style="color: #D4D4D4"> </span><span style="color: #569CD6">var</span><span style="color: #D4D4D4"> </span><span style="color: #9CDCFE">item</span><span style="color: #D4D4D4"> = </span><span style="color: #9CDCFE">it</span><span style="color: #D4D4D4">.</span><span style="color: #9CDCFE">value</span><span style="color: #D4D4D4">;</span>
<span style="color: #D4D4D4"> }</span>
</code></pre>
<p>Many iterators will signal an error if <a href="Iterator.html#next">next</a> is called
after the underlying collection has been modified.</p>
<p>To avoid confusion when dealing with <a href="Iterable.html">Iterable</a>s,
iterators implement the <a href="Iterable.html#iterator">Iterable.iterator</a> property
by just returning themselves.</p>
</div>
</section>
<section class="tsd-panel tsd-type-parameters">
<h3>Type parameters</h3>
<ul class="tsd-type-parameters">
<li>
<h4>T</h4>
</li>
</ul>
</section>
<section class="tsd-panel-group tsd-index-group">
<h2>Index</h2>
<section class="tsd-panel tsd-index-panel">
<div class="tsd-index-content">
<section class="tsd-index-section ">
<h3>Properties</h3>
<ul class="tsd-index-list">
<li class="tsd-kind-property tsd-parent-kind-interface tsd-is-overwrite"><a href="Iterator.html#count" class="tsd-kind-icon">count</a></li>
<li class="tsd-kind-property tsd-parent-kind-interface tsd-is-overwrite"><a href="Iterator.html#iterator" class="tsd-kind-icon">iterator</a></li>
<li class="tsd-kind-property tsd-parent-kind-interface"><a href="Iterator.html#key" class="tsd-kind-icon">key</a></li>
<li class="tsd-kind-property tsd-parent-kind-interface"><a href="Iterator.html#value" class="tsd-kind-icon">value</a></li>
</ul>
</section>
<section class="tsd-index-section ">
<h3>Methods</h3>
<ul class="tsd-index-list">
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="Iterator.html#all" class="tsd-kind-icon">all</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="Iterator.html#any" class="tsd-kind-icon">any</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="Iterator.html#each" class="tsd-kind-icon">each</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface tsd-is-overwrite"><a href="Iterator.html#first" class="tsd-kind-icon">first</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="Iterator.html#next" class="tsd-kind-icon">next</a></li>
<li class="tsd-kind-method tsd-parent-kind-interface"><a href="Iterator.html#reset" class="tsd-kind-icon">reset</a></li>
</ul>
</section>
</div>
</section>
</section>
<section class="tsd-panel-group tsd-member-group ">
<h2>Properties</h2>
<section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-interface tsd-is-overwrite">
<a name="count" class="tsd-anchor"></a>
<h3>
<span class="tsd-flag ts-flagReadonly">Readonly</span> <span class="tsd-flag ts-flagOverride">Override</span>
count
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">number</span> </h3>
<div class="tsd-comment tsd-typography">
<p>This read-only property is the total number of items in the iterated collection.</p>
</div>
</section>
<section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-interface tsd-is-overwrite">
<a name="iterator" class="tsd-anchor"></a>
<h3>
<span class="tsd-flag ts-flagOverride">Override</span>
iterator
<span class="tsd-signature-symbol">: </span><a href="Iterator.html" class="tsd-signature-type" data-tsd-kind="Interface">Iterator</a><span class="tsd-signature-symbol"><</span><span class="tsd-signature-type">T</span><span class="tsd-signature-symbol">></span> </h3>
<div class="tsd-comment tsd-typography">
<p>Returns itself, which is convenient for code that expects an <a href="Iterable.html">Iterable</a>
instead of an <a href="Iterator.html">Iterator</a>.</p>
</div>
</section>
<section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-interface">
<a name="key" class="tsd-anchor"></a>
<h3>
<span class="tsd-flag ts-flagReadonly">Readonly</span>
key
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">any</span> </h3>
<div class="tsd-comment tsd-typography">
<p>Gets the current index to the item in the collection, assuming <a href="Iterator.html#next">next</a> has just returned true.</p>
</div>
</section>
<section class="tsd-panel tsd-member tsd-kind-property tsd-parent-kind-interface">
<a name="value" class="tsd-anchor"></a>
<h3>
<span class="tsd-flag ts-flagReadonly">Readonly</span>
value
<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">T</span> </h3>
<div class="tsd-comment tsd-typography">
<p>Gets the current item in the collection, assuming <a href="Iterator.html#next">next</a> has just returned true.</p>
</div>
</section>
</section>
<section class="tsd-panel-group tsd-member-group ">
<h2>Methods</h2>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="all" class="tsd-anchor"></a>
<h3>
<span class="tsd-flag ts-flagVirtual">Virtual</span>
all
</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">all<span class="tsd-signature-symbol">(</span>pred<span class="tsd-signature-symbol">: </span><span class="tsd-signature-symbol">(</span>x<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">T</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> => </span><span class="tsd-signature-type">boolean</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<p>This is true if all invocations of the given predicate on items in the collection are true.</p>
<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.</p>
<p>This automatically <a href="Iterator.html#reset">reset</a>'s itself when it is called.</p>
<dl class="tsd-comment-tags">
<dt>since</dt>
<dd><p>1.4</p>
</dd>
</dl>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>pred: <span class="tsd-signature-symbol">(</span>x<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">T</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> => </span><span class="tsd-signature-type">boolean</span></h5>
<div class="tsd-comment tsd-typography">
<p>This function must not have any side-effects.</p>
</div>
<ul class="tsd-parameters">
</ul>
</li>
</ul>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
<p>True if all predicate calls are true; false otherwise.</p>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="any" class="tsd-anchor"></a>
<h3>
<span class="tsd-flag ts-flagVirtual">Virtual</span>
any
</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">any<span class="tsd-signature-symbol">(</span>pred<span class="tsd-signature-symbol">: </span><span class="tsd-signature-symbol">(</span>x<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">T</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> => </span><span class="tsd-signature-type">boolean</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<p>This is true if any invocation of the given predicate on items in the collection is true.</p>
<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.</p>
<p>This automatically <a href="Iterator.html#reset">reset</a>'s itself when it is called.</p>
<dl class="tsd-comment-tags">
<dt>since</dt>
<dd><p>1.4</p>
</dd>
</dl>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>pred: <span class="tsd-signature-symbol">(</span>x<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">T</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> => </span><span class="tsd-signature-type">boolean</span></h5>
<div class="tsd-comment tsd-typography">
<p>This function must not have any side-effects.</p>
</div>
<ul class="tsd-parameters">
</ul>
</li>
</ul>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
<p>True if any predicate call is true; false otherwise.</p>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="each" class="tsd-anchor"></a>
<h3>
<span class="tsd-flag ts-flagVirtual">Virtual</span>
each
</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">each<span class="tsd-signature-symbol">(</span>func<span class="tsd-signature-symbol">: </span><span class="tsd-signature-symbol">(</span>x<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">T</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> => </span><span class="tsd-signature-type">void</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<p>Call the given function on each item in the collection.</p>
<p>This automatically <a href="Iterator.html#reset">reset</a>'s itself when it is called.</p>
<dl class="tsd-comment-tags">
<dt>since</dt>
<dd><p>1.4</p>
</dd>
</dl>
</div>
<h4 class="tsd-parameters-title">Parameters</h4>
<ul class="tsd-parameters">
<li>
<h5>func: <span class="tsd-signature-symbol">(</span>x<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">T</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol"> => </span><span class="tsd-signature-type">void</span></h5>
<div class="tsd-comment tsd-typography">
<p>This function must not modify the collection.</p>
</div>
<ul class="tsd-parameters">
</ul>
</li>
</ul>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4>
<p>this iterator itself</p>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface tsd-is-overwrite">
<a name="first" class="tsd-anchor"></a>
<h3>
<span class="tsd-flag ts-flagOverride">Override</span>
first
</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface tsd-is-overwrite">
<li class="tsd-signature tsd-kind-icon">first<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">T</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<p>Advance if needed to the first item in the collection and return it, or return null if there is none.</p>
<p>Caution: this returns a <em>key/value pair</em>, not a <em>value</em>, for <a href="Map.html">Map</a> iterators.</p>
<dl class="tsd-comment-tags">
<dt>since</dt>
<dd><p>1.1</p>
</dd>
</dl>
</div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">T</span></h4>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="next" class="tsd-anchor"></a>
<h3>
next
</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">next<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<p>Call this method to advance the iterator to the next item in the collection.
This should be called before accessing any <a href="Iterator.html#value">value</a>.</p>
</div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
<p>whether another item is available; when true the value of <a href="Iterator.html#value">value</a> will be that item.</p>
</li>
</ul>
</section>
<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-interface">
<a name="reset" class="tsd-anchor"></a>
<h3>
reset
</h3>
<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-interface">
<li class="tsd-signature tsd-kind-icon">reset<span class="tsd-signature-symbol">(</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">void</span></li>
</ul>
<ul class="tsd-descriptions">
<li class="tsd-description">
<div class="tsd-comment tsd-typography">
<p>Start this iterator all over again.</p>
</div>
<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">void</span></h4>
</li>
</ul>
</section>
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<a href="Iterator.html#first" class="tsd-kind-icon">first</a>
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<a href="Iterator.html#next" class="tsd-kind-icon">next</a>
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<script src="../assets/js/main.js"></script>
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-1506307-5"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date()); gtag('config', 'UA-1506307-5');
var getOutboundLink = function(url, label) {
gtag('event', 'click', {
'event_category': 'outbound',
'event_label': label,
'transport_type': 'beacon'
});
}
// topnav
var topButton = document.getElementById("topnavButton");
var topnavList = document.getElementById("topnavList");
topButton.addEventListener("click", function() {
this.classList.toggle("active");
topnavList.classList.toggle("hidden");
document.getElementById("topnavOpen").classList.toggle("hidden");
document.getElementById("topnavClosed").classList.toggle("hidden");
});
</script>
</body>
</html>