Question

I am trying to come up with a regex to take the following string: 1:38P and convert it to a valid format for parsing in a date. I need to

1. Check that the last character is either A or P, and if it is NOT, do nothing to the string.
2. If the last letter is an A or P, then strip out that letter from the string, and prepend a Zero (0) to the string.

Answer 1

var d = "1:38P";
var pat = /^(\d+:\d+)(A|P)$/;
var m = pat.exec(d);
if (m) { console.log('We have our winner' + 0 + m[1]}