add common_js/2darray_to_collection

Signed-off-by: Alex Ivanov <ai@contributor.pw>

Author: contributorpw

snippets/common_js/2darray_to_collection/appsscript.json

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+{
+  "timeZone": "Europe/Moscow",
+  "dependencies": {},
+  "exceptionLogging": "STACKDRIVER",
+  "runtimeVersion": "V8"
+}

snippets/common_js/2darray_to_collection/config.json

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+{
+  "type": "standalone"
+}

snippets/common_js/2darray_to_collection/index.js

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+/**
+ * Converts a 2D array to a collection.
+ *
+ * @param {Array.<Array.<any>>} array
+ * @returns {Array.<object>}
+ */
+function arrayToCollection_(array) {
+  return array.slice(1).map(
+    (_, rowIndex) =>
+      array[0].reduce((rowCollection, header, columnIndex) => {
+        rowCollection[header] = array[rowIndex + 1][columnIndex];
+        return rowCollection;
+      }, {}),
+    []
+  );
+}

snippets/common_js/2darray_to_collection/index.min.js

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+function arrtocoll_(e) {
+  return e
+    .slice(1)
+    .map((r, c) => e[0].reduce((r, n, o) => ((r[n] = e[c + 1][o]), r), {}), []);
+}

snippets/common_js/2darray_to_collection/readme.md

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+---
+title: 'Converts a 2D array to a collection'
+date: '2021-07-13'
+description: 'Simple conversion of an array into a collection is a common task. There is not always a desire to use wrappers or proxies.'
+tags: ['common']
+categories: ['snippets']
+images: ['./snippets/common_js/2darray_to_collection/screenshot.png']
+---
+
+## Simple conversion of an array into a collection
+
+{{< toc >}}
+
+![Simple conversion of an array into a collection](./screenshot.png)
+
+### Snippet
+
+- {{< externalLink >}}
+- {{< commentLink >}}
+- {{< scrvizLink >}}
+
+{{< codeFromFile "index.js" >}}
+
+### Run it
+
+{{< codeFromFile "run.js" >}}
+
+### Minimized version
+
+For quick use, you can use a more transparent version
+
+{{< codeFromFile "index.min.js" >}}
+
+{{< clipboard >}}

snippets/common_js/2darray_to_collection/run.js

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+/* global arrayToCollection_ arrtocoll_ */
+
+const ARRAY = [
+  ['Num', 'Date', 'Name', 'Amount'],
+  [1, new Date(), 'Alex', 100],
+  [2, new Date(), 'Nate', 200],
+  [3, new Date(), 'Piter', 300],
+];
+
+/**
+ * Runs the snippet
+ */
+function run() {
+  // Don't forget a deep copy
+  const array = ARRAY.map((r) => [...r]);
+  // Headings become keys
+  array[0].forEach((_, i) => (array[0][i] = array[0][i].toLocaleLowerCase()));
+  const collection = arrayToCollection_(array);
+  console.log(collection);
+}
+
+/**
+ * Runs the minimized function of the snippet
+ */
+function runMiniFn() {
+  // Don't forget a deep copy
+  const array = ARRAY.map((r) => [...r]);
+  // Headings become keys
+  array[0].forEach((_, i) => (array[0][i] = array[0][i].toLocaleLowerCase()));
+  const collection = arrtocoll_(array);
+  console.log(collection);
+}