How do I shorten returned coordinates?

Question

Using Cycript (mixed with javascript) via a tweak I have this code:

var latitude = [IS2Weather currentLatitude];

This returns -1.65456038607131e+25

I want to limit it to 6 decimal places (-1.654560), what is the correct way to achieve this please? I can't seem to get anything to work.

A latitude value of `-1.65456038607131e+25` seems wrong, also it actually has no decimals. — Teemu, Mar 12 '16 at 11:45
-1.65456038607131e+25 expressed without the exponential notation is -16545603860713100000000000. which is clearly an error for a Latitude. See [Engineering notation](https://en.wikipedia.org/wiki/Engineering_notation). — zaph, Mar 12 '16 at 12:37
Are you complaining about debug output of a meaningless (i.e. erroneous) value? — Eiko, Mar 12 '16 at 12:59
Yes, sorry, I am in contact with the dev of the tweak to fix the values, thanks for your help. — Nicoll, Mar 12 '16 at 13:14

score 0 · Answer 1 · answered Mar 12 '16 at 11:22

0

Have you tried calling latitude.toPrecision(6)?

answered Mar 12 '16 at 11:22

Evan Lucas

this gives me -2.63868e+13, I don't know why I get the e or the +. – Nicoll Mar 12 '16 at 11:45
That is strange. The e represents exponential notation. See https://en.wikipedia.org/wiki/Scientific_notation (particularly the E notation section) – Evan Lucas Mar 12 '16 at 12:11
Thanks for the info, I talking with the dev to get it done in the tweak itself: [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude]; – Nicoll Mar 12 '16 at 12:19
@EvanLucas No, the `e` represents engineering notation used in displaying the value. – zaph Mar 12 '16 at 13:26

score 0 · Accepted Answer · answered Mar 12 '16 at 11:22

0

Use javascript .toFixed(n) method

latitude = latitude.toFixed(6);

answered Mar 12 '16 at 11:22

Munawir

1

If the coordinates are -1234567, this make them -1234567.000000 – Nicoll Mar 12 '16 at 11:42
After the dev fixed the coordinates issue, this worked. – Nicoll Mar 12 '16 at 13:59

2 Answers2