Solve p21 in js, attempt table sorting

README.rst

@@ -55,6 +55,9 @@ Olivia's Project Euler Solutions
 .. |pcc| replace:: ``pcc``
 .. |tcc| replace:: ``tcc``
 
+.. table::
+   :class: datatable
+
 +------------+----------------------------+--------+-------------------+
 | Language   | Version                    | Solved | Status            |
 +============+============================+========+===================+
@@ -78,7 +81,7 @@ Olivia's Project Euler Solutions
 |            | Microsoft, Oracle, |br|    |        | |CodeQL| |br|     |
 |            | Semeru, Temurin, & Zulu    |        | |Java-lint|       |
 +------------+----------------------------+--------+-------------------+
-| JavaScript | Node 12+ |br|              | 32     | |JavaScript| |br| |
+| JavaScript | Node 12+ |br|              | 33     | |JavaScript| |br| |
 |            | Bun 1.0+ |br|              |        | |Js-Cov| |br|     |
 |            | Browser [#]_               |        | |CodeQL| |br|     |
 |            |                            |        | |ESLint|          |

docs/_static/main.js

@@ -0,0 +1,3 @@
+$(document).ready( function () {
+    $('table.datatable').DataTable();
+} );

docs/conf.py

@@ -78,7 +78,14 @@
 
 html_theme = 'sphinx_rtd_theme'
 html_static_path = ['_static']
-html_css_files = ['style.css']
+html_css_files = [
+    'https://cdn.datatables.net/1.10.23/css/jquery.dataTables.min.css',
+    'style.css'
+]
+html_js_files = [
+    'https://cdn.datatables.net/1.10.23/js/jquery.dataTables.min.js',
+    'main.js',
+]
 
 # -- Options for autodoc extension -------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/extensions/autodoc.html#configuration

docs/index.rst

@@ -60,7 +60,8 @@ Problems Solved
 | |s|  |Done, but slower than 60 seconds|
 +------+--------------------------------+
 
-.. rst-class:: centertable
+.. table::
+   :class: datatable centertable
 
 +-----------+------------+------------+------------+------------+------------+------------+------------+
 |           |    |C|     |    |Cp|    |    |C#|    |    |Ja|    |    |Js|    |    |Py|    |    |Rs|    |
@@ -75,7 +76,6 @@ Problems Solved
 +-----------+------------+------------+------------+------------+------------+------------+------------+
 | Browser   |    |ip|    |    |ip|    |            |            |    |d|     |    |d|     |    |d|     |
 +-----------+------------+------------+------------+------------+------------+------------+------------+
-+-----------+------------+------------+------------+------------+------------+------------+------------+
 |:prob:`1`  |:c-d:`0001` |:cp-d:`0001`|:cs-d:`0001`|:ja-d:`0001`|:js-d:`0001`|:py-d:`0001`|:rs-d:`0001`|
 +-----------+------------+------------+------------+------------+------------+------------+------------+
 |:prob:`2`  |:c-d:`0002` |:cp-d:`0002`|:cs-d:`0002`|:ja-d:`0002`|:js-d:`0002`|:py-d:`0002`|:rs-d:`0002`|
@@ -116,7 +116,7 @@ Problems Solved
 +-----------+------------+------------+------------+------------+------------+------------+------------+
 |:prob:`20` |:c-d:`0020` |:cp-d:`0020`|:cs-d:`0020`|:ja-d:`0020`|:js-d:`0020`|:py-d:`0020`|:rs-d:`0020`|
 +-----------+------------+------------+------------+------------+------------+------------+------------+
-|:prob:`21` |            |            |            |            |            |:py-d:`0021`|:rs-i:`0021`|
+|:prob:`21` |            |            |            |            |:js-d:`0021`|:py-d:`0021`|:rs-i:`0021`|
 +-----------+------------+------------+------------+------------+------------+------------+------------+
 |:prob:`22` |:c-d:`0022` |:cp-d:`0022`|:cs-d:`0022`|:ja-d:`0022`|:js-d:`0022`|:py-d:`0022`|:rs-d:`0022`|
 +-----------+------------+------------+------------+------------+------------+------------+------------+

docs/src/javascript/p0021.rst

@@ -0,0 +1,20 @@
+JavaScript Implementation of Problem 21
+=======================================
+
+Includes
+--------
+
+- `factors <./lib/factors.html>`_
+
+Problem Solution
+----------------
+
+View source code :source:`javascript/src/p0021.js`
+
+.. js:autofunction:: p0021
+
+.. literalinclude:: ../../../javascript/src/p0021.js
+   :language: javascript
+   :linenos:
+
+.. tags:: divisor-sum, prime-number, factorization, divisibility, js-iterator

docs/src/rust/p0021.rst

@@ -12,4 +12,4 @@ Problem Solution
    :language: rust
    :linenos:
 
-.. tags:: large-numbers, digit-sum, factorial
+.. tags:: divisor-sum, prime-number, factorization, divisibility, rust-iterator

javascript/README.rst

@@ -119,6 +119,7 @@ Problems Solved
 -  ☒ `18 <./src/p0019.js>`__
 -  ☒ `19 <./src/p0019.js>`__
 -  ☒ `20 <./src/p0020.js>`__
+-  ☒ `21 <./src/p0021.js>`__
 -  ☒ `22 <./src/p0022.js>`__
 -  ☒ `23 <./src/p0023.js>`__
 -  ☒ `27 <./src/p0027.js>`__

javascript/euler.test.js

@@ -43,6 +43,7 @@ const answers = {
     18: [require('./src/p0018.js'), false],
     19: [require('./src/p0019.js'), false],
     20: [require('./src/p0020.js'), false],
+    21: [require('./src/p0021.js'), false],
     22: [require('./src/p0022.js'), false],
     23: [require('./src/p0023.js'), false],
     27: [require('./src/p0027.js'), false],

javascript/src/p0021.js

@@ -0,0 +1,30 @@
+/**
+ * Project Euler Problem 21
+ *
+ * Problem:
+ * @return {number}
+*/
+exports.p0021 = function() {
+    let answer = 0;
+    const toCheck = Array.from(...Array(10000).keys());
+    for (const a of toCheck) {
+        const b = d(a);
+        if (a !== b && d(b) === a) {
+            answer += a + b;
+            if (b < 10000) {
+                toCheck.splice(toCheck.find(b), 1);
+            }
+        }
+    }
+    return answer;
+};
+
+/**
+ * @param {number} i
+ * @return {number}
+*/
+function d(i) {
+    return Array.from(factors.properDivisors(i)).reduce((x, y) => x + y, 0);
+}
+
+const factors = require('./lib/factors');