大约有 48,000 项符合查询结果（耗时：0.0797秒） [XML]
Getting distance between two points based on latitude/longitude
...n, cos, sqrt, atan2, radians
# approximate radius of earth in km
R = 6373.0
lat1 = radians(52.2296756)
lon1 = radians(21.0122287)
lat2 = radians(52.406374)
lon2 = radians(16.9251681)
dlon = lon2 - lon1
dlat = lat2 - lat1
a = sin(dlat / 2)**2 + cos(lat1) * cos(lat2) * sin(dlon / 2)**2
c = 2 * ata...
Accessing members of items in a JSONArray with Java
...Object(int), and JSONArray.length() to create your for-loop:
for (int i = 0; i < recs.length(); ++i) {
JSONObject rec = recs.getJSONObject(i);
int id = rec.getInt("id");
String loc = rec.getString("loc");
// ...
}
...
How to check a not-defined variable in JavaScript
...
1707
In JavaScript, null is an object. There's another value for things that don't exist, undefined....
How to stop an app on Heroku?
...ectively takes all your app http-processes offline.
$ heroku ps:scale web=0
Scaling web processes... done, now running 0
share
|
improve this answer
|
follow
...
How do I test a camera in the iPhone simulator?
...
140
There are a number of device specific features that you have to test on the device, but it's no ...
How do I fix “for loop initial declaration used outside C99 mode” GCC error?
...o.h>
int main() {
int i;
/* for loop execution */
for (i = 10; i < 20; i++) {
printf("i: %d\n", i);
}
return 0;
}
Read more on for loops in C here.
share
|
impro...
How to extract base URL from a string in JavaScript?
...
20 Answers
20
Active
...
How can I get the source code of a Python function?
...
answered Jan 9 '09 at 9:44
Rafał DowgirdRafał Dowgird
36.7k1010 gold badges7272 silver badges8989 bronze badges
...
How do you keep parents of floated elements from collapsing? [duplicate]
...
+50
Solution 1:
The most reliable and unobtrusive method appears to be this:
Demo: http://jsfiddle.net/SO_AMK/wXaEH/
HTML:
<div cl...