<div dir="ltr"><div class="gmail_default" style="font-family:georgia,serif">I don't know if this is a good idea. If you insert an item to an array, what should happen? The items after the inserted item should be considered as removed or not? They indexes are changed but the values not.</div><div class="gmail_default" style="font-family:georgia,serif"><br></div><div class="gmail_default" style="font-family:georgia,serif">zhaoxin</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jan 12, 2016 at 7:24 PM, James Campbell via swift-evolution <span dir="ltr"><<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">When declaring a collection, it would be nice to have a way of knowing when an item is set/added and removed.<div><br></div><div>For example you could trigger a layer to be added to the layer hiearchy.</div><div><br></div><div>var shapeLayers: [CAShapeLayer] {</div><div><br></div><div>didAdd(item) {</div><div> addSubLayer(item)</div><div>}</div><div><br></div><div>willRemove(item){</div><div> item.removeFromSuperlayer()</div><div>}</div><div>}</div><span class="HOEnZb"><font color="#888888"><div><div><br></div>-- <br><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div><span style="font-size:16px;line-height:19.2px"></span><span style="font-size:12.8px"> Wizard</span><br></div><div><a href="mailto:james@supmenow.com" target="_blank">james@supmenow.com</a></div><div><a href="tel:%2B44%207523%20279%20698" value="+447523279698" target="_blank">+44 7523 279 698</a></div></div></div></div></div></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><br>Owen Zhao<br></div></div></div>
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