JavaScript: Get English ordinal suffix for the day of the month
JavaScript Datetime: Exercise-23 with Solution
Write a JavaScript function to get the English ordinal suffix for the day of the month, 2 characters (st, nd, rd, or th).
Test Data :
dt= new Date();
console.log(english_ordinal_suffix(dt));
"23rd"
dt = new Date(2015, 10, 1);
console.log(english_ordinal_suffix(dt));
"1st"
Sample Solution:-
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JavaScript function to get English ordinal suffix for the day of the month, 2 characters (st, nd, rd or th.)</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function english_ordinal_suffix(dt)
{
return dt.getDate()+(dt.getDate() % 10 == 1 && dt.getDate() != 11 ? 'st' : (dt.getDate() % 10 == 2 && dt.getDate() != 12 ? 'nd' : (dt.getDate() % 10 == 3 && dt.getDate() != 13 ? 'rd' : 'th')));
}
dt = new Date();
console.log(english_ordinal_suffix(dt));
dt = new Date(2015, 10, 1);
console.log(english_ordinal_suffix(dt));
Sample Output:
20th 1st
Flowchart:

Live Demo:
See the Pen JavaScript - Get English ordinal suffix for the day of the month-date-ex-23 by w3resource (@w3resource) on CodePen.
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JavaScript: Tips of the Day
Returns 1 if the array is sorted in ascending order, -1 if it is sorted in descending order or 0 if it is not sorted
Example:
const tips_Sorted = arr => { let direction = -(arr[0] - arr[1]); for (let [i, val] of arr.entries()) { direction = !direction ? -(arr[i - 1] - arr[i]) : direction; if (i === arr.length - 1) return !direction ? 0 : direction / Math.abs(direction); else if ((val - arr[i + 1]) * direction > 0) return 0; } }; console.log(tips_Sorted([0, 1, 2, 2])); console.log(tips_Sorted([5, 7, 3])); console.log(tips_Sorted([8, 6, 4]));
Output:
1 0 -1
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