I want to extract time from this string "Last Updated on Jul 9 2019, 3:15 pm +08"
<div id="demo"></div>
<script>
var str = "Last Updated on Jul 9 2019, 3:15 pm +08";
var result = str.match(???);
if(result) {
document.getElementById("demo").innerHTML = result;
}
</script>or is it possible to extract the date and time but in array form like ['Jul 9 2019','3:15pm']
I'm new to using regular expression and have no idea how to formulate the pattern. Thanks in advance!
You can use a positive lookbehind to find 'on' in the string, grab everything up to the pm/am, and split on the comma and space, assuming the format is consistent:
const str = "Last Updated on Jul 9 2019, 3:15 pm +08"
console.log(str.match(/(?<=on ).*(p|a)m/)[0].split(', '))Note, the positive lookbehind feature is not compatible with all browsers, so I would recommend using adiga's approach if compatibility is an issue.
You could use the regex /on ([^,]+),\s*(.*(?:am|pm))/ with one capturing for date and another for time
var str = "Last Updated on Jul 9 2019, 3:15 pm +08";
var result = str.match(/on ([^,]+),\s*(.*(?:am|pm))/);
result.shift();
console.log(result)
var [, ...result] here instead of shift, so you don't have to write another line :P
var. So, didn't want to make it confusing by adding destructuringThis can be done without using regex (assuming that the format of the time remains same like in the example you gave). Like this:
var str = "Last Updated on Jul 9 2019, 3:15 pm +08";
var onlyTime = []
onlyTime.push(str.split(' ').slice(3,6).join(' ').slice(0, -1));
onlyTime.push(str.split(' ').slice(6,8).join(''));
console.log(onlyTime)if you what use regular expression you can use '\d{1,2}:\d{2} (am|pm)' for find the time into the string of date. With \d{1,2} you have the digit between 1 and 60, with (am|pm) you find string 'am' OR string 'pm'.
[{'Jul 9 2019'},{'3:15pm'}]is not even valid syntax in Javascript.Last Updated on. Otherwise, there is no way of doing this with a simple regex.