<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div><blockquote type="cite" class=""><div class="">On 16 Dec 2015, at 12:47, Sean Kosanovich via swift-evolution <<a href="mailto:swift-evolution@swift.org" class="">swift-evolution@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">As a Groovy user, I really enjoy the shorthand Spread Operator over the Collect Closure (Map is the equivalent in Swift).</span><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br class=""></div><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Consider the following Swift code:</div><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br class=""></div><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="" style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"><span class="" style="color: rgb(187, 44, 162);">struct</span><span class="Apple-converted-space"> </span>Car {</div><div class="" style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"> <span class="Apple-converted-space"> </span><span class="" style="color: rgb(187, 44, 162);">let</span><span class="Apple-converted-space"> </span>make:<span class="Apple-converted-space"> </span><span class="" style="color: rgb(112, 61, 170);">String</span></div><div class="" style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"> <span class="Apple-converted-space"> </span><span class="" style="color: rgb(187, 44, 162);">let</span><span class="Apple-converted-space"> </span>model:<span class="Apple-converted-space"> </span><span class="" style="color: rgb(112, 61, 170);">String</span></div><div class="" style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;">}</div><div class="" style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo; min-height: 13px;"><br class=""></div><div class="" style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"><span class="" style="color: rgb(187, 44, 162);">let</span><span class="Apple-converted-space"> </span>cars = [<span class="" style="color: rgb(79, 129, 135);">Car</span>(make:<span class="Apple-converted-space"> </span><span class="" style="color: rgb(209, 47, 27);">"Jeep"</span>, model:<span class="Apple-converted-space"> </span><span class="" style="color: rgb(209, 47, 27);">"Grand Cherokee"</span>),<span class="Apple-converted-space"> </span><span class="" style="color: rgb(79, 129, 135);">Car</span>(make:<span class="Apple-converted-space"> </span><span class="" style="color: rgb(209, 47, 27);">"Dodge"</span>, model:<span class="Apple-converted-space"> </span><span class="" style="color: rgb(209, 47, 27);">"Challenger"</span>)]</div><div class="" style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"><span class="" style="color: rgb(187, 44, 162);">let</span><span class="Apple-converted-space"> </span>makes =<span class="Apple-converted-space"> </span><span class="" style="color: rgb(79, 129, 135);">cars</span>.<span class="" style="color: rgb(61, 29, 129);">map</span>() { $0.<span class="" style="color: rgb(79, 129, 135);">make</span><span class="Apple-converted-space"> </span>}</div></div><div class="" style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; margin: 0px; font-size: 11px; font-family: Menlo;"><br class=""></div><div class="" style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; margin: 0px; font-size: 11px; font-family: Menlo;"> </div><div class="" style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; margin: 0px; font-size: 11px; font-family: Menlo;"><br class=""></div><div class="" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div class="">Now consider the same code using a Spread Operator:</div><div class=""><br class=""></div><div class=""><div class="" style="margin: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"><span class="" style="color: rgb(187, 44, 162);">let</span><span class="Apple-converted-space"> </span>makes =<span class="Apple-converted-space"> </span><span class="" style="color: rgb(79, 129, 135);">cars</span>*.make</div></div></div></div></blockquote></div><br class=""><div class="">I think there is a tension in Swift between its object oriented nature and higher-order functions which leads to a lot of repetition of { $0.property }</div><div class=""><span class="" style="font-family: Menlo; font-size: 11px; color: rgb(79, 129, 135);"><br class=""></span></div><div class="">In this example:</div><div class=""><span class="" style="font-family: Menlo; font-size: 11px; color: rgb(79, 129, 135);">cars</span><span style="font-family: Menlo; font-size: 11px;" class="">.</span><span class="" style="font-family: Menlo; font-size: 11px; color: rgb(61, 29, 129);">map</span><span style="font-family: Menlo; font-size: 11px;" class=""> { $0.</span><span class="" style="font-family: Menlo; font-size: 11px; color: rgb(79, 129, 135);">make</span><span style="font-family: Menlo; font-size: 11px;" class=""> }</span></div><div class=""><span style="font-family: Menlo; font-size: 11px;" class=""><br class=""></span></div><div class=""><div class="">I’d like to write the following, but ‘make’ is a member, not a free function:</div></div><div class=""><span class="" style="font-family: Menlo; font-size: 11px; color: rgb(79, 129, 135);">cars</span><span style="font-family: Menlo; font-size: 11px;" class="">.</span><span class="" style="font-family: Menlo; font-size: 11px; color: rgb(61, 29, 129);">map</span><span class="" style="font-family: Menlo; font-size: 11px;">(</span><span class="" style="font-family: Menlo; font-size: 11px; color: rgb(79, 129, 135);">make)</span></div><div class=""><span class="" style="font-family: Menlo; font-size: 11px; color: rgb(79, 129, 135);"><br class=""></span></div><div class="">Is anyone else irked by the preponderance of { $0.property } in Swift (or is it just me being grumpy)? Not sure what the solution would be, but I can’t say I’m keen on the suggestion of:</div><div class=""><span class="" style="font-family: Menlo; font-size: 11px; color: rgb(79, 129, 135);"><br class=""></span></div><div class=""><span class="" style="font-family: Menlo; font-size: 11px; color: rgb(79, 129, 135);">cars</span><span style="font-family: Menlo; font-size: 11px;" class="">*.make</span></div><div class=""><br class=""></div><div class="">It’s too mysterious.</div></body></html>