Clean master commit

src/js/data/utilities.js

@@ -0,0 +1,37 @@
+/**
+  * Get URI params to start with predefined set of
+  * https://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript
+  * @param {string} name: name of paramater to search
+  * @param {string} url: url passed as variable, defaults to window.location.href
+  */
+export function getParameterByName(name, url) {
+  if (!url) url = window.location.href;
+  name = name.replace(/[\[\]]/g, `\\$&`);
+
+  const regex = new RegExp(`[?&]${name}(=([^&#]*)|&|#|$)`);
+  const results = regex.exec(url);
+
+  if (!results) return null;
+  if (!results[2]) return '';
+
+  return decodeURIComponent(results[2].replace(/\+/g, ' '));
+}
+
+/**
+ * Compare two arrays of scalars
+ * @param {array} arr1: array of numbers
+ * @param {array} arr2: array of numbers
+ */
+export function areEqual(arr1, arr2) {
+    return ((arr1.length === arr2.length) && arr1.every((element, index) => {
+        return element === arr2[index];
+    }));
+}
+
+/**
+* Return whether the variable is neither null nor undefined
+* @param {object} variable
+*/
+export function isNotNullNorUndefined(variable) {
+  return (typeof variable !== 'undefined' && variable !== null);
+}