<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi,<div><br></div><div>This is the first real error in the tutorial. Section 3.3 is incomplete, and doesn't make any sense.</div><div><br></div><div>It refers to greeting.txt from the previous section, but there is no greeting.txt in the previous section. There's a greeting procedure, but no greeting file. It seems that this might refer to hello.txt. Also, the line in the box refers to outfile, which wasn't defined.</div><div><br></div><div><br></div><div>So, the text in section 3.3 should read:</div><div><br></div><div><br></div><div><span class="Apple-style-span" style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; "><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 8px; margin-left: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px; line-height: 17px; color: rgb(51, 51, 51); padding-top: 5px; padding-right: 30px; padding-bottom: 0px; padding-left: 30px; ">In the previous section, the file <code class="filename">hello.txt</code> is used only to store an intermediate result. We don't really care about which name is used for the file, and we can let Swift choose the name.</p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 8px; margin-left: 0px; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 12px; line-height: 17px; color: rgb(51, 51, 51); padding-top: 5px; padding-right: 30px; padding-bottom: 0px; padding-left: 30px; ">To do that, omit the mapping entirely when declaring outfile:</p></span></div><div><br></div><div>And line in the box should read:</div><div><br></div><div><span class="Apple-style-span" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(51, 51, 51); font-size: 12px; line-height: 17px; ">messagefile hellofile; </span></div><div><br></div><div><br></div><div>For completeness, the code from the previous example could be restated with this change:</div><div><br></div><div><br></div><div><span class="Apple-style-span" style="font-family: Verdana, Arial, Helvetica, sans-serif; color: rgb(51, 51, 51); font-size: 12px; line-height: 17px; "><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "><span class="keyword" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(32, 32, 128); font-weight: bold; ">type</span><span style="font-family: Consolas, 'Andale Mono', monospaced; "> messagefile {} <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "> <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; ">(messagefile t) greeting (<span class="keyword" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(32, 32, 128); font-weight: bold; ">string</span><span style="font-family: Consolas, 'Andale Mono', monospaced; "> s) { <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "> <span class="keyword" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(32, 32, 128); font-weight: bold; ">app</span><span style="font-family: Consolas, 'Andale Mono', monospaced; "> { <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "> echo s stdout=<span class="function" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(128, 0, 64); ">@filename</span><span style="font-family: Consolas, 'Andale Mono', monospaced; ">(t); <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "> } <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; ">} <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "> <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; ">(messagefile o) capitalise(messagefile i) { <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "> <span class="keyword" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(32, 32, 128); font-weight: bold; ">app</span><span style="font-family: Consolas, 'Andale Mono', monospaced; "> { <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "> tr <span class="string" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(32, 144, 32); ">"[a-z]"</span><span style="font-family: Consolas, 'Andale Mono', monospaced; "> </span><span class="string" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(32, 144, 32); ">"[A-Z]"</span><span style="font-family: Consolas, 'Andale Mono', monospaced; "> stdin=</span><span class="function" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(128, 0, 64); ">@filename</span><span style="font-family: Consolas, 'Andale Mono', monospaced; ">(i) stdout=</span><span class="function" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(128, 0, 64); ">@filename</span><span style="font-family: Consolas, 'Andale Mono', monospaced; ">(o); <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "> } <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; ">} <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "> <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; ">messagefile hellofile<span style="font-family: Consolas, 'Andale Mono', monospaced; ">; <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; ">messagefile final <<span class="string" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(32, 144, 32); ">"capitals.txt"</span><span style="font-family: Consolas, 'Andale Mono', monospaced; ">>; <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; "> <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; ">hellofile = greeting(<span class="string" style="font-family: Consolas, 'Andale Mono', monospaced; color: rgb(32, 144, 32); ">"hello from Swift"</span><span style="font-family: Consolas, 'Andale Mono', monospaced; ">); <br style="font-family: Consolas, 'Andale Mono', monospaced; "></span></span><span class="codeline" style="font-family: Consolas, 'Andale Mono', monospaced; ">final = capitalise(hellofile); </span></span></div><div><br></div><div><br></div><div>Dan<br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 9px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 9px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><span class="Apple-style-span" style="font-family: 'Lucida Grande'; font-size: 10px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="font-family: Helvetica; font-size: 12px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; "><font class="Apple-style-span" face="Courier">-- </font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; "><font class="Apple-style-span" face="Courier">Daniel S. Katz</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; "><font class="Apple-style-span" face="Courier">University of Chicago</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; "><font class="Apple-style-span" face="Courier">(773) 834-7186 (voice)</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; "><font class="Apple-style-span" face="Courier">(773) 834-3700 (fax)</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; "><font class="Apple-style-span" face="Courier"><a href="mailto:d.katz@ieee.org">d.katz@ieee.org</a> or <a href="mailto:dsk@ci.uchicago.edu">dsk@ci.uchicago.edu</a></font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; min-height: 14px; "><span class="Apple-style-span" style="font-family: Courier; "><a href="http://www.ci.uchicago.edu/~dsk/">http://www.ci.uchicago.edu/~dsk/</a></span></div><div><font class="Apple-style-span" face="Courier"><br></font></div></div></div></span></div></div></div></span></div></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline">
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