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Aakash Panchal 2020-03-08 14:28:39 +05:30 committed by GitHub
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Akash Articles/RegEx/Practial_applications.html
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@ -1,3 +1,4 @@
<html>
<head>
<style type="text/css">
@ -32,6 +33,22 @@
pre, code {
padding: 1em;
}
table {
border:1px solid black;
border-collapse: collapse;
min-width:60%;
}
th, td{
border:1px solid black;
border-collapse: collapse;
text-align: center;
}
tr:nth-child(even) {background-color: #f2f2f2;}
</style>
<script>
document.addEventListener('readystatechange', event => {
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<p>We can divide the range 0-255 into three ranges: 0-199, 200-249 &amp; 250-255. Now, creating an expression, for each of them independently, is easy.</p>
<pre><code>| Range| RegEx |
| :--: | :--: |
| 0-199 | `[01][0-9][0-9]` |
| 200-249| `2[0-4][0-9]`|
| 250-255| `25[0-5]`|
</code></pre>
<table>
<tr>
<td>Range</td>
<td>RegEx</td>
</tr>
<tr>
<td>0-199</td>
<td>[01][0-9][0-9]</td>
</tr>
<tr>
<td>200-249</td>
<td>2[0-4][0-9]</td>
</tr>
<tr>
<td>250-255</td>
<td>25[0-5]</td>
</tr>
</table>
<p>Now, by using OR operator, we can match the whole 0-255 range.</p>
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<h2 id="validateanipaddress">Validate an IP address</h2>
<p>IP address consists of digits from 0-255 and 3 points(<code>.</code>). Valid IP address format is (0-255).(0-255).(0-255).(0-255).</p>
<p>IP address consists of digits from 0-255 and 3 points(<code>.</code>). Valid IP address format is <br> (0-255).(0-255).(0-255).(0-255).</p>
<p>For example, 10.10.11.4, 255.255.255.255, 234.9.64.43, 1.2.3.4 are Valid IP addresses.</p>