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Functional Java

- Quickstart

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<h2>Quickstart</h2>

<p><div id="preamble">

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<p>The latest stable version as at July 2015 is 5.0. Here is how to quickly add the library to your project and get started.</p>

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<p>The Functional Java artifact is published to Maven Central using the group <code>org.functionaljava</code> with three published artifacts:</p>

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<li> <p>the core library (<code>functionaljava</code>)</p> </li>

<li> <p>Quickcheck property based testing module (<code>functionaljava-quickcheck</code>)</p> </li>

<li> <p>Java core helper, a simple functional helper for java.util standard types (<code>functionaljava-java-core</code>)</p> </li>

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<h2 id="_gradle">Gradle</h2>

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<p>To add Functional Java to your Gradle project, add the following snippet to the <em>dependencies</em> section of your <code>build.gradle</code> file.</p>

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<pre>compile "org.functionaljava:functionaljava:5.0"

compile "org.functionaljava:functionaljava-quickcheck:5.0"

compile "org.functionaljava:functionaljava-java-core:5.0"</pre>

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<h2 id="_maven">Maven</h2>

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<p>Add the following dependencies.</p>

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<pre class="prettyprint highlight"><code class="language-xml" data-lang="xml">&lt;dependency&gt;

&lt;groupId&gt;org.functionaljava&lt;/groupId&gt;

&lt;artifactId&gt;functionaljava&lt;/artifactId&gt;

&lt;version&gt;5.0&lt;/version&gt;

&lt;/dependency&gt;

&lt;dependency&gt;

&lt;groupId&gt;org.functionaljava&lt;/groupId&gt;

&lt;artifactId&gt;functionaljava-quickcheck&lt;/artifactId&gt;

&lt;version&gt;5.0&lt;/version&gt;

&lt;/dependency&gt;

&lt;dependency&gt;

&lt;groupId&gt;org.functionaljava&lt;/groupId&gt;

&lt;artifactId&gt;functionaljava-java-core&lt;/artifactId&gt;

&lt;version&gt;5.0&lt;/version&gt;

&lt;/dependency&gt;</code></pre>

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<h2 id="_first_code_example">First Code Example</h2>

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<div class="paragraph">

<p>We can easily map over a list to apply the same function to each element in the list and print the resulting list. Note that this uses the list <code>fj.data.List</code>.</p>

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<pre class="prettyprint highlight"><code class="language-java" data-lang="java">import static fj.data.List.list;

import fj.data.List;

import static fj.Show.intShow;

import static fj.Show.listShow;

public final class ListMapExample {

public static void main(final String[] args) {

final List&lt;Integer&gt; a = list(1, 2, 3).map(i -&gt; i + 42);

listShow(intShow).println(a); // [43,44,45]

// combined into a single line

listShow(intShow).println(list(1, 2, 3).map(i -&gt; i + 42)); // [43,44,45]

}

}</code></pre>

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