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Author: mperry

examples-java8.html

@@ -101,9 +101,6 @@ <h2>Java 8 Examples</h2>
 <li>
 <p><a href="#optionMap">Option map</a></p>
 </li>
-<li>
-    <p><a href="#ioWalkthrough">IO Walkthrough</a></p>
-</li>
 </ul>
 </div>
 </div>
@@ -396,79 +393,7 @@ <h2 id="optionMap">Option Map</h2>
 </div>
 </div>
 </div>
-</div>
-    <div class="sect1">
-        <h2 id="ioWalkthrough">IO Walkthrough</h2>
-        <div class="sectionbody">
-            <div class="paragraph">
-                <p><a href="https://github.com/functionaljava/functionaljava/blob/master/demo/src/main/java/fj/demo/IOWalkthrough.java">Github Source</a></p>
-            </div>
-            <div class="paragraph">
-                <p>Demonstrates how to work with the IO type.</p>
-            </div>
-            <div class="listingblock">
-                <div class="content">
-<pre class="prettyprint highlight"><code class="language-java" data-lang="java">
-// IO is just a container to defer a computation (lazy), with the intention to encapsulate computations that either
-// consume and/or produce side-effects
-// the computation is not (yet) executed on creation hence it can be treated like a value
-
-final IO&lt;Unit&gt; askName = () -&gt; {
-    System.out.println(&quot;Hi, what's your name?&quot;);
-    return Unit.unit();
-};
-
-// fj.data.IOFunctions contains a lot of convenience functions regarding IO, the above example could be rewritten with IOFunctions.stdoutPrintln
-// we now create an IO value to prompt for the name if executed
-
-IO&lt;Unit&gt; promptName = IOFunctions.stdoutPrint(&quot;Name: &quot;);
-
-// we can compose these two values with fj.data.IOFunctions.append, since they both are not interested in any runtime value
-
-IO&lt;Unit&gt; askAndPromptName = IOFunctions.append(askName, promptName);
-
-// now we create an IO value to read a line from stdin
-
-final IO&lt;String&gt; readName = () -&gt; new BufferedReader(new InputStreamReader(System.in)).readLine();
-
-// this is the same as IOFunctions.stdinReadLine()
-
-// now we create a function which takes a string, upper cases it and creates an IO value that would print the upper cased string if executed
-
-final F&lt;String, IO&lt;Unit&gt;&gt; upperCaseAndPrint = F1Functions.&lt;String, IO&lt;Unit&gt;, String&gt;o(IOFunctions::stdoutPrintln).f(String::toUpperCase);
-
-// we now want to compose reading the name with printing it, for that we need to have access to the runtime value that is returned when the
-// IO value for read is executed, hence we use fj.data.IOFunctions.bind instead of fj.data.IOFunctions.append
-
-final IO&lt;Unit&gt; readAndPrintUpperCasedName = IOFunctions.bind(readName, upperCaseAndPrint);
-
-// so append is really just a specialised form of bind, ignoring the runtime value of the IO execution that was composed before us
-
-final IO&lt;Unit&gt; program = IOFunctions.bind(askAndPromptName, ignored -&gt; readAndPrintUpperCasedName);
-
-// this is the same as writing IOFunctions.append(askAndPromptName, readAndPrintUpperCasedName)
-
-// we have recorded the entire program, but have not run anything yet
-// now we get to the small dirty part at the end of our program where we actually execute it
-// we can either choose to just call program.run(), which allows the execution to escape
-// or we use safe to receive an fj.data.Either with the potential exception on the left side
-
-toSafeValidation(program).run().on((IOException e) -&gt; { e.printStackTrace(); return Unit.unit(); });
-
-// doing function composition like this can be quite cumbersome, since you will end up nesting parenthesis unless you flatten it out by
-// assigning the functions to variables like above, but you can use the fj.F1W syntax wrapper for composing single-argument functions and fj.data.IOW
-// for composing IO values instead, the entire program can be written like so:
-
-IOW.lift(stdoutPrintln(&quot;What's your name again?&quot;))
-        .append(stdoutPrint(&quot;Name: &quot;))
-        .append(stdinReadLine())
-        .bind(F1W.lift((String s) -&gt; s.toUpperCase()).andThen(IOFunctions::stdoutPrintln))
-        .safe().run().on((IOException e) -&gt; { e.printStackTrace(); return Unit.unit(); });
-</code></pre>
-                </div>
-            </div>
-        </div>
-    </div></p>
+</div></p>
           </article>
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