<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=""><br class=""><div><blockquote type="cite" class=""><div class="">On Nov 11, 2016, at 12:14 AM, Ray Fix via swift-users <<a href="mailto:swift-users@swift.org" class="">swift-users@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="" style="font-family: Alegreya-Regular; font-size: 15px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: 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;">The reason I don’t think it is provided is because it is difficult to know what to do when keys collide.</div></div></blockquote><br class=""></div><div>When you add a single entry to a dictionary with []=, it simply replaces any existing value. I would expect adding <i class="">multiple</i> entries to do the same. (Which is what NSDictionary’s -addEntries: method does.)</div><div><br class=""></div><div>Sure, there are different policies you could want, like ignoring duplicate keys or somehow combining the values, but replacing is a common default. It seems wrong not to have this method just because there’s more than one way it could work. (“Don’t let the best be the enemy of the good.”)</div><div><br class=""></div><div>—Jens</div></body></html>