Update and rename getQuarterOfYear.md to quarterOfYear.md

snippets/getQuarterOfYear.md

@@ -1,23 +0,0 @@
----
-title: getQuarterOfYear.md
-tags: array,intermediate
----
-
-It returns the quarter and year to which the supplied date belongs to.
-
-- getMonth() function return 0 to 11 based on the month and hence I am adding 1 to it.
-- getFullYear() function returns the full year of the passed date.
-- in the return statement we have used string literals to combine stirng with our variables. we are dividing the month by 3 as we have 4 quarters in a year.
-
-```js
-const getQuarterOfYear = (date) => {
-  const month = new Date(date).getMonth() + 1;
-  const year = new Date(date).getFullYear();
-  return `Q${Math.ceil(month / 3)}-${year}`;
-};
-```
-
-```js
-getQuarterOfYear("07/10/2018"); // Q3-2018 (dateformat: mm/dd/yyyy)
-getQuarterOfYear("12/12/2020"); // Q4-2020 (dateformat: mm/dd/yyyy)
-```

snippets/quarterOfYear.md

@@ -0,0 +1,23 @@
+---
+title: quarterOfYear
+tags: date,beginner
+---
+
+Returns the quarter and year to which the supplied date belongs to.
+
+- Use `Date.prototype.getMonth()` to get the current month in the range (0, 11), add `1` to map it to the range (1, 12).
+- Use `Math.ceil()` and divide the month by `3` to get the current quarter.
+- Use `Date.prototype.getFullYear()` to get the year from the given date.
+- Omit the argument, `date`, to use the current date by default.
+
+```js
+const quarterOfYear = (date = new Date()) => [
+  Math.ceil((date.getMonth() + 1) / 3),
+  date.getFullYear(),
+];
+```
+
+```js
+quarterOfYear(new Date('07/10/2018')); // [ 3, 2018 ]
+quarterOfYear(); // [ 4, 2020 ]
+```