<div dir="ltr">Why not just do ?</div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Dec 23, 2015 at 1:02 PM, Daniel Valls Estella 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 style="word-wrap:break-word"><div>I think => may be confusing in many of shown cases. Its a cause/efect symbol and can be also and operator.</div><div><br></div><div>I put again the idea of with for the newcomers:</div><span class=""><div><br></div><div><div><font face="Courier New">with ( <b>parameters</b> ) -> <b>return_type</b> {</font></div><div><font face="Courier New"> <b>statements</b></font></div><div><font face="Courier New">}</font></div></div><div><br></div></span><div><div><div><br></div><div><span style="font-family:'Courier New'">sorted = names.sort(</span><span style="font-family:'Courier New'"> </span><b style="font-family:'Courier New'">with</b><span style="font-family:'Courier New'">(s1, s2){ s1 > s2 } )</span></div><div><div><font face="Courier New"><br></font></div><div><span style="font-family:'Courier New'">sorted</span><span style="font-family:'Courier New'"> = names.sort(</span><span style="font-family:'Courier New'"> </span><b style="font-family:'Courier New'">with</b><span style="font-family:'Courier New'">{ $0 > $1 } )</span></div><div><div><br></div></div></div></div><div><font face="Courier New"><br></font></div><div><div><font face="Courier New">sorted = names.sort() <b>with</b> { $0 > $1 } </font></div><div><font face="Courier New"><br></font></div></div><div><font face="Courier New">reversed = names.sort <b>with</b><span>(s1,s2)</span>{</font></div><div><font face="Courier New"><br></font></div><div><font face="Courier New"><span style="white-space:pre-wrap"> </span>//bla bla code</font></div><div><font face="Courier New"><span style="white-space:pre-wrap"> </span>return resultVar </font></div><div><font face="Courier New">}</font></div><div><font face="Courier New"> </font></div><div><span class=""><div><font face="Courier New">reversed = names.sort <b>with</b> { $0 > $1 } </font></div><div><font face="Courier New"><br></font></div><div><font face="Courier New"><br></font></div></span><div>But thinking about it, what we are really always doing with clousures is solving a quicky tiny delegation pattern. Maybe we could name it what it is. Too long word, but just to brainstorm.</div><div><br></div><div><div><div><font face="Courier New">delegating ( <b>parameters</b> ) -> <b>return_type</b> {</font></div><div><font face="Courier New"> <b>statements</b></font></div><div><font face="Courier New">}</font></div></div><div><br></div><div><div><div><br></div><div><span style="font-family:'Courier New'">sorted = names.sort(</span><span style="font-family:'Courier New'"> </span><span style="font-family:'Courier New'"><b>delegating</b></span><span style="font-family:'Courier New'">(s1, s2){ s1 > s2 } )</span></div><div><div><font face="Courier New"><br></font></div><div><span style="font-family:'Courier New'">sorted</span><span style="font-family:'Courier New'"> = names.sort(</span><span style="font-family:'Courier New'"> </span><span style="font-family:'Courier New'"><b>delegating</b></span><span style="font-family:'Courier New'">{ $0 > $1 } )</span></div><div><div><br></div></div></div></div><div><font face="Courier New"><br></font></div><div><div><font face="Courier New">sorted = names.sort() <b>delegating</b>{ $0 > $1 } </font></div><div><font face="Courier New"><br></font></div></div><div><font face="Courier New">reversed = names.sort <span><b>delegating</b>(s1,s2)</span>{</font></div><div><font face="Courier New"><br></font></div><div><font face="Courier New"><span style="white-space:pre-wrap"> </span>//bla bla code</font></div><div><font face="Courier New"><span style="white-space:pre-wrap"> </span>return resultVar </font></div><div><font face="Courier New">}</font></div><div><font face="Courier New"> </font></div><div><div><font face="Courier New">reversed = names.sort <b>delegating</b>{ $0 > $1 }</font></div></div></div></div></div></div><div><br></div><div><br></div><div><br></div><div>:)</div><br><div><blockquote type="cite"><div>El 23 des 2015, a les 12:49, Pierre Monod-Broca via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>> va escriure:</div><div><div class="h5"><br><div><div style="word-wrap:break-word">I like that the closure parameters are inside the closure, to me it makes as much sense as outside. They're the input, so as much in as out.<div><br></div><div>I have nothing against `in`, but I wouldn't be against a sensible replacement.</div><div>I like `=>`, but I'm concerned it might be confused with `->` by beginners in swift.</div><div><br></div><div><div>
<div style="letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word"><div>-- </div><div>Pierre</div></div>
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<br><div><blockquote type="cite"><div>Le 23 déc. 2015 à 11:21, Brent Royal-Gordon via swift-evolution <<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>> a écrit :</div><br><div><div>I have to admit I haven't read the entire thread, so maybe I missed discussion of this.<br><br>I, too, don't like the `params in code` syntax. After a year and a half with Swift, I now remember it, but it still reads funny, and I see new developers struggle with it frequently. I've also used Ruby quite a bit, but I really don't like the `||` syntax there either.<br><br>What I would do is pull the parameters/type signature out of the braces and put a symbol in front of them. For example:<br><br><span style="white-space:pre-wrap"> </span>let names = people.map => person { <a href="http://person.name" target="_blank">person.name</a> }<br><br><span style="white-space:pre-wrap"> </span>database.saveRecord(record) => record, error {<br><span style="white-space:pre-wrap"> </span><span style="white-space:pre-wrap"> </span>if let record = record {<br><span style="white-space:pre-wrap"> </span><span style="white-space:pre-wrap"> </span><span style="white-space:pre-wrap"> </span>completionHandler(true)<br><span style="white-space:pre-wrap"> </span><span style="white-space:pre-wrap"> </span>}<br><span style="white-space:pre-wrap"> </span><span style="white-space:pre-wrap"> </span>else {<br><span style="white-space:pre-wrap"> </span><span style="white-space:pre-wrap"> </span><span style="white-space:pre-wrap"> </span>handleError(error!)<br><span style="white-space:pre-wrap"> </span><span style="white-space:pre-wrap"> </span>}<br><span style="white-space:pre-wrap"> </span>}<br><br>`=>` is used here merely because it's been discussed upthread; I actually think it's a little too heavy for this role, but I don't have a great replacement immediately at hand.<br><br>A no-parameters closure would not require a `=>`; a bare block would still do there. I suppose the capture list would still go before the parameters, but after the `=>`. Other closure features remain the same—you can still use the `$N` implicit parameters, and you can still use `->` to specify a return value, `()` to surround the parameters, `:` to specify exact types, etc.<br><br>-- <br>Brent Royal-Gordon<br>Architechies<br><br>_______________________________________________<br>swift-evolution mailing list<br><a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a><br><a href="https://lists.swift.org/mailman/listinfo/swift-evolution" target="_blank">https://lists.swift.org/mailman/listinfo/swift-evolution</a><br></div></div></blockquote></div><br></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><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>+44 7523 279 698</div></div></div></div></div></div>
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