iritmaximus/haskell
1
0
Fork 0
mirror of https://github.com/iritmaximus/haskell.git synced 2026-10-12 19:13:39 +03:00
Code Issues Packages Projects Releases Wiki Activity

part1: fix area of circle

Browse Source 
fixes #105
This commit is contained in:
Joel Kaasinen
2024-10-30 09:02:25 +02:00
parent a228b07116
commit 19fc7a63a7
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
part1.html
+1 -1
View File
@@ -241,7 +241,7 @@ code span.wa { color: #60a0b0; font-weight: bold; font-style: italic; } /* Warni
<p><strong>Pattern matching</strong> – defining functions based on cases that correspond to your data definitions:</p>
<div class="sourceCode" id="cb5"><pre class="sourceCode haskell"><code class="sourceCode haskell"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a>area <span class="dt">Point</span> <span class="ot">=</span> <span class="dv">0</span></span>
<span id="cb5-2"><a href="#cb5-2" aria-hidden="true" tabindex="-1"></a>area (<span class="dt">Rectangle</span> width height) <span class="ot">=</span> width <span class="op">*</span> height</span>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a>area (<span class="dt">Circle</span> radius) <span class="ot">=</span> <span class="dv">2</span> <span class="op">*</span> <span class="fu">pi</span> <span class="op">*</span> radius</span></code></pre></div>
<span id="cb5-3"><a href="#cb5-3" aria-hidden="true" tabindex="-1"></a>area (<span class="dt">Circle</span> radius) <span class="ot">=</span> <span class="dv">2</span> <span class="op">*</span> <span class="fu">pi</span> <span class="op">*</span> radius <span class="op">*</span> radius</span></code></pre></div>
<p><strong>Lists</strong> – Unlike many languages, Haskell has a concise built-in syntax for lists. Lists can be built from other lists using <em>list comprehensions</em>. Here’s a snippet that generates names of even length from a set of options for first and last names:</p>
<div class="sourceCode" id="cb6"><pre class="sourceCode haskell"><code class="sourceCode haskell"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a>[whole <span class="op">|</span> first <span class="ot">&lt;-</span> [<span class="st">&quot;Eva&quot;</span>, <span class="st">&quot;Mike&quot;</span>],</span>
<span id="cb6-2"><a href="#cb6-2" aria-hidden="true" tabindex="-1"></a> <span class="fu">last</span> <span class="ot">&lt;-</span> [<span class="st">&quot;Smith&quot;</span>, <span class="st">&quot;Wood&quot;</span>, <span class="st">&quot;Odd&quot;</span>],</span>