Merge pull request #61 from CoderDojoPotsdam/niccokunzmann-patch-1

fix #56

Author: weerox

steps/07-05-start-and-end.html

@@ -0,0 +1,25 @@
+---
+layout: step
+title: Start and End
+lang: en
+---
+<p>
+  You can find lines in which the <span class="regex">a</span> appears only twice or four times.
+</p>
+<div class="playfield">
+  <input type="text" value="" class="regex" reference="^aa$|^aaaa$">
+  <div class="message"></div>
+  <ul class="examples">
+    <li>a</li>
+    <li>aa</li>
+    <li>aaa</li>
+    <li>aaaa</li>
+    <li>aaaaa</li>
+  </ul>
+</div>
+<p class="hint">
+  <span class="regex">^aa|aaaa$</span> does not work, because <span class="regex">^aa</span> matches <span class="regex">aaa</span>.
+  <span class="regex">aaa</span> also starts with <span class="regex">aa</span>.
+  This is why both <span class="regex">^</span> and <span class="regex">$</span> must be used twice in the expression.
+</p>
+