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Question

create an array that mimics a clock (javascript)

Answer 1

+3 A:

there are a million ways to do this. here's one:

var theHours = [];
for (var i=0; i<= 23; i++) {
    theHours[i] = (i == 0) ? "12 AM" : ((i <12) ? i + " AM" : (i-12 || 12) + " PM");
}

returns

["12 AM", "1 AM", "2 AM", "3 AM", "4 AM", "5 AM", "6 AM", "7 AM", "8 AM", "9 AM", "10 AM", "11 AM", "12 PM", "1 PM", "2 PM", "3 PM", "4 PM", "5 PM", "6 PM", "7 PM", "8 PM", "9 PM", "10 PM", "11 PM"]

ithcy 2010-02-03 21:56:25

looks good, testing it right now =)

Derek Adair 2010-02-03 21:57:29

wait... got a slight error in there... fixed now.

ithcy 2010-02-03 21:59:07

thanks for the accept, but Jordan's is actually the better answer if you're not looking for a mental exercise.

ithcy 2010-02-03 22:04:31

Answer 2

+4 A:

Frankly, this is the most efficient way:

var hours = [ '12 AM',  '1 AM', '2 AM', '3 AM',  '4 AM',  '5 AM',
               '6 AM',  '7 AM', '8 AM', '9 AM', '10 AM', '11 AM',
              '12 PM',  '1 PM', '2 PM', '3 PM',  '4 PM',  '5 PM',
               '6 PM',  '7 PM', '8 PM', '9 PM', '10 PM', '11 PM'  ];

Jordan 2010-02-03 22:00:37

Yeah but what happens when the speed of the rotation of the earth changes and we suddenly have 25 hours in a day? WHAT THEN??

ithcy 2010-02-03 22:02:44

Then we both have to update our code. ;)

Jordan 2010-02-03 22:03:38

True, this isn't something that needs to be dynamic, since it's not going to change, after all. No reason for it to be computed each time.

Alex JL 2010-02-03 22:04:15

+1 for being more efficient, however for what I need itchy's answer is what I'm looking for.

Derek Adair 2010-02-03 22:05:25

I'm actually pairing data and it's beneficial to have it running in a loop.

Derek Adair 2010-02-03 22:06:43

@Jordan: OK, meet you back here on February 32 at 16 PM.

ithcy 2010-02-03 22:18:58

Answer 3

A:

This is a method I used before:

var hour,meridien;
cow=['12 am'];
for(i=0;i<23;i++){
  if(i>11){hour=i-11;meridien=(hour==12)?'am':'pm';}
  else{hour=i+1;meridien=(hour==12)?'pm':'am';}
  cow.push(hour+' '+meridien);
  }

returns

["12 am", "1 am", "2 am", "3 am", "4 am", "5 am", "6 am", "7 am", "8 am", "9 am", "10 am", "11 am",
 "12 pm", "1 pm", "2 pm", "3 pm", "4 pm", "5 pm", "6 pm", "7 pm", "8 pm", "9 pm", "10 pm", "11 pm"]

Alex JL 2010-02-03 22:10:01

Uh... why is the array called `cow`??

Daniel Vandersluis 2010-02-03 22:13:18

Cow is always a friendly choice.

Alex JL 2010-02-03 22:37:26

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create an array that mimics a clock (javascript)

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