Converting FROM hh:mm to minutes (opposite of last weeks post) 1

[DoctorGonzo]

Hi guys,

Tsuji and Diancecht gladly provided me with the code below last week which converts MINUTEs into HOURS and MINUTES in the format hh:mm.... this works perfectly.

EXAMPLE :
function toHoursAndMinutes(minutes) {
var mins = minutes%60; //modulus dividing by 60
var hrs = (minutes - mins)/60; //Now you get an integer division
alert(hrs+":"+mins);
}

Brilliant. However, I now have a requirement to do the OPPOSITE of this - ie

1) get a handle to a field where user has entered hh:mm
2) convert this to minutes

i.e. user enters 2:15 and this converts to 135 minutes

probably need to validate to make sure user enters correctly in hh:mm format

can anyone assist? This maths/logic is a big problem for me

Many thanks!

Gonzo

 

[Diancecht]

Well, I leave validation for anyone who knows regex, but the maths behind this are not really complicated

Would be something like

var hoursDotMinutes = "2:15";
var fieldArray = hoursDotMinutes.split(":");
var minutes = parseint(fieldArray[0]) + 60*parseint(fieldArray[1]);

Cheers,
Dian

 

[DoctorGonzo]

Cheers Dian!

I used it in this function - as you can see we just had the * and the + the wrong way around, but I spotted that (as I said my maths is terrible!)

function toMinutes(mins) {
var hoursDotMinutes = mins;
var fieldArray = hoursDotMinutes.split(":");
var minutes = parseInt(fieldArray[0])*60 + parseInt(fieldArray[1]);
}

Many thanks again for all your help.

Gonzo

 

[Diancecht]

D'oh, my bad. That happens when you don't test things.

Glad you got it to work.

Cheers,
Dian