Simon Leung

<div>
so, X is the current value of the array and i is the array index, correct ?<br />
<br />
Thx
</div>


so, X is the current value of the array and i is the array index, correct ?

Thx

<div>
<blockquote>
so, X is the current value of the array and i is the array index, correct ?
</blockquote>
yup.<br />
<br />
and because we filled the array with 0 (<mark>.fill(0)</mark>), so all the values of the array are identical as 0.
</div>


> so, X is the current value of the array and i is the array index, correct ?

yup.

and because we filled the array with 0 (.fill(0)), so all the values of the array are identical as 0.

<div>
<div class="content wysiwyg-content">
What does the actual code perform &nbsp;? From my guessing <br />
#1 Array(Math.ceil(this.repo.<wbr />movies.len<wbr />gth/ this.repo.pagination.movie<wbr />sPerPage))<wbr /> &nbsp;==&gt; Create a array of elements depending on expression result<br />
#2. .fill(0) ==&gt; Fill up each array element with 0<br />
#3 .map((x, i) =&gt; i + 1 &nbsp;=&gt; What does it want to do ???<br />
<br />
<br />
get pages(): number[] {<br />
&nbsp; &nbsp; &nbsp; &nbsp; if (this.repo.movies != null) {<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return Array(Math.ceil(this.repo.<wbr />movies.len<wbr />gth<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; / this.repo.pagination.movie<wbr />sPerPage))<wbr /><br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; .fill(0).map((x, i) =&gt; i + 1);<br />
&nbsp; &nbsp; &nbsp; &nbsp; } else {<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; return [];<br />
&nbsp; &nbsp; &nbsp; &nbsp; }
</div>
</div>


What does the actual code perform  ? From my guessing 
#1 Array(Math.ceil(this.repo.movies.length/ this.repo.pagination.moviesPerPage))  ==> Create a array of elements depending on expression result
#2. .fill(0) ==> Fill up each array element with 0
#3 .map((x, i) => i + 1  => What does it want to do ???


get pages(): number[] {
        if (this.repo.movies != null) {
            return Array(Math.ceil(this.repo.movies.length
                / this.repo.pagination.moviesPerPage))
                .fill(0).map((x, i) => i + 1);
        } else {
            return [];
        }

Angular Expression Query

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.

JavaScript

Angular is a JavaScript open-source web application framework used to develop single-page applications. It aims to simplify both the development and the testing of such applications by providing a framework for client-side model–view–controller (MVC) and model–view–view-model (MVVM) architectures, along with components commonly used in rich Internet applications. Angular is the front-end part of the MEAN stack, together with Node.js runtime, Express.js backend framework and MongoDB database.