Way to ng-repeat defined number of times instead of repeating over array?

Matheus Mello
Matheus Mello
September 2, 2023
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How to ng-repeat a Defined Number of Times Instead of Repeating Over an Array? 🔄

<p>🤔 Have you ever wondered if there's a way to use <code>ng-repeat</code> to display a list a specific number of times, without having to iterate over an array? Look no further – we have the solution for you!</p>

The Problem 😫

<p>Let's say you want to display a list, with each list item incrementing by 1, for a defined number of times. However, the traditional usage of <code>ng-repeat</code> requires an array to iterate over.</p>

The Desired Result 🎯

<p>Take a look at the desired result:</p>

<pre><code>&lt;ul&gt; &lt;li&gt;&lt;span&gt;1&lt;/span&gt;&lt;/li&gt; &lt;li&gt;&lt;span&gt;2&lt;/span&gt;&lt;/li&gt; &lt;li&gt;&lt;span&gt;3&lt;/span&gt;&lt;/li&gt; &lt;li&gt;&lt;span&gt;4&lt;/span&gt;&lt;/li&gt; &lt;li&gt;&lt;span&gt;5&lt;/span&gt;&lt;/li&gt; &lt;/ul&gt; </code></pre>

The Solution 💡

<p>To achieve this desired result, we can use the <code>ng-repeat</code> directive with a trick using the <code>Array</code> constructor and the <code>$index</code> property.</p>

<p>Here's how you can do it:</p>

<ul>
   <li ng-repeat="i in Array(number).fill().map((_, index) => index + 1)">
      <span>{{ i }}</span>
   </li>
</ul>

<p>Explanation:</p> <ul> <li>We create an <code>Array</code> of a defined length by passing the <code>number</code> variable to the <code>Array</code> constructor.</li> <li>We then use the <code>fill()</code> method to populate the array with undefined values.</li> <li>Next, we use the <code>map()</code> method to incrementally fill the array with values from 1 up to the defined number. We achieve this by using an arrow function that takes the index as a parameter and returns the incremented value.</li> <li>Finally, we use <code>{{ i }}</code> to display each number as a list item.</li> </ul>

Your Turn! ✏️

<p>Now you have the power to repeat a specific number of times with ease. Go ahead and put this solution into practice in your Angular app!</p>

<p>Remember to get creative and adapt this solution to your specific needs. Share your results or any issues you encountered in the comments below. We'd love to hear from you! 😊</p>

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