<div style="white-space:pre-wrap">What did you use before `where` existed?<br></div><br><div class="gmail_quote"><div dir="ltr">On Mon, Jun 13, 2016 at 1:29 AM Charlie Monroe via swift-evolution <<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><div><blockquote type="cite"><div style="font-family:Helvetica;font-size:10px;font-style:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">And to follow-up to myself once again, I went to my "Cool 3rd Party Swift Repos" folder and did the same search. Among the 15 repos in that folder, a joint search returned about 650 hits on for-in (again with some false positives) and not a single for-in-while use.</div><div style="font-family:Helvetica;font-size:10px;font-style:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br></div></blockquote></div></div><div style="word-wrap:break-word"><div><blockquote type="cite"><div style="font-family:Helvetica;font-size:10px;font-style:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px">-- E</div></blockquote><div><br></div><div>Not to undermine this fact, but I believe the fact that `where` can be used in a for loop is not widely known. I didn't know about it until about a month ago (haven't really read much docs, but most people don't either).</div><div><br></div><div>But after I found out about it, I started using it and it IMHO improved readability of my code. Not by much, but it's the little things that make you smile, right?</div><div><br></div><div>Many people here argument that `where` is a Swift speciality and needs to be learned by the developer - the alternative is to teach the person what's the proper alternative - that using .filter can have performance impact and that the *correct* way is to use guard within the for loop. And that's IMHO much worse than teaching a person about using `where` within a for loop.</div></div></div><div style="word-wrap:break-word"><div><br><blockquote type="cite"><div><span style="font-family:Helvetica;font-size:10px;font-style:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">_______________________________________________</span><br style="font-family:Helvetica;font-size:10px;font-style:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><span style="font-family:Helvetica;font-size:10px;font-style:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">swift-evolution mailing list</span><br style="font-family:Helvetica;font-size:10px;font-style:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><a href="mailto:swift-evolution@swift.org" style="font-family:Helvetica;font-size:10px;font-style:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" target="_blank">swift-evolution@swift.org</a><br style="font-family:Helvetica;font-size:10px;font-style:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" style="font-family:Helvetica;font-size:10px;font-style:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px" target="_blank">https://lists.swift.org/mailman/listinfo/swift-evolution</a></div></blockquote></div></div>_______________________________________________<br>
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