Update extractor script

scripts/util/helpers.js

@@ -0,0 +1,60 @@
+const config = require('../../config');
+
+const getMarkDownAnchor = paragraphTitle =>
+  paragraphTitle
+    .trim()
+    .toLowerCase()
+    .replace(/[^\w\- ]+/g, '')
+    .replace(/\s/g, '-')
+    .replace(/\-+$/, '');
+// Creates an object from pairs
+const objectFromPairs = arr => arr.reduce((a, v) => ((a[v[0]] = v[1]), a), {});
+// Optimizes nodes in an HTML document
+const optimizeNodes = (data, regexp, replacer) => {
+  let count = 0;
+  let output = data;
+  do {
+    output = output.replace(regexp, replacer);
+    count = 0;
+    while (regexp.exec(output) !== null) ++count;
+  } while (count > 0);
+  return output;
+};
+// Capitalizes the first letter of a string
+const capitalize = (str, lowerRest = false) =>
+  str.slice(0, 1).toUpperCase() +
+  (lowerRest ? str.slice(1).toLowerCase() : str.slice(1));
+const prepTaggedData = tagDbData =>
+  [...new Set(Object.entries(tagDbData).map(t => t[1][0]))]
+    .filter(v => v)
+    .sort((a, b) =>
+      capitalize(a, true) === 'Uncategorized'
+        ? 1
+        : capitalize(b, true) === 'Uncategorized'
+        ? -1
+        : a.localeCompare(b),
+    );
+const makeExamples = data => {
+  data =
+    data.slice(0, data.lastIndexOf(`\`\`\`${config.language}`)).trim() +
+    misc.collapsible(
+      'Examples',
+      data.slice(
+        data.lastIndexOf(`\`\`\`${config.language}`),
+        data.lastIndexOf('```'),
+      ) + data.slice(data.lastIndexOf('```')),
+    );
+  return `${data}\n<br>${misc.link(
+    '⬆ Back to top',
+    misc.anchor('Contents'),
+  )}\n\n`;
+};
+
+module.exports = {
+  getMarkDownAnchor,
+  objectFromPairs,
+  optimizeNodes,
+  capitalize,
+  prepTaggedData,
+  makeExamples,
+};