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Calculate the center point of multiple latitude/longitude coordinate pairs
... @Alnitak Here we want to search the center of the area circumscribed by the coordinates. Are you sure you commented on the right place?
– LowFieldTheory
Jul 31 '15 at 0:19
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How to determine if Javascript array contains an object with an attribute that equals a given value?
...` not boolean
}
See my jsfiddle link There is a polyfill for IE provided by mozilla
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How to create a zip file in Java
...Stream(f));
ZipEntry e = new ZipEntry("mytext.txt");
out.putNextEntry(e);
byte[] data = sb.toString().getBytes();
out.write(data, 0, data.length);
out.closeEntry();
out.close();
This will create a zip in the root of D: named test.zip which will contain one single file called mytext.txt. Of cours...
Facebook access token server-side validation for iPhone app
...ps://graph.facebook.com/app/?access_token=[user_access_token] as described by Get application id from user access token (or verify the source application for a token).
This appears to be an undocumented feature, but returns JSON containing the id of the app the token was generated for. If the toke...
java.sql.SQLException: Incorrect string value: '\xF0\x9F\x91\xBD\xF0\x9F…'
...ter, utf8 cannot store the character at all,
while utf8mb4 requires four bytes to store it. Since utf8 cannot store
the character at all, you do not have any supplementary characters in
utf8 columns and you need not worry about converting characters or
losing data when upgrading utf8 data fr...
ASP.NET MVC - TempData - Good or bad practice
...ests and thus leads to degraded performance.
Since tempdata uses session by default you wouldn't be able to use this feature. You can switch to using cookies for tempdata, but it's a bit awkward (at least for me). Still cleaner than viewstate, though, so maybe it's not such a big dealbreaker.
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How to check if element is visible after scrolling?
...e if an element is visible in the viewpor, or in any scrollable container, by using an observer.
The need to attach a scroll event and manually checking on the event callback is eliminated, thus the efficiency:
// this is the target which is observed
var target = document.querySelector('div')
/...
How do I check if a string is unicode or ascii?
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In Python 3, all strings are sequences of Unicode characters. There is a bytes type that holds raw bytes.
In Python 2, a string may be of type str or of type unicode. You can tell which using code something like this:
def whatisthis(s):
if isinstance(s, str):
print "ordinary string"
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bash: shortest way to get n-th column of output
...will want to extend the script to allow a different column delimiter. Awk by default parses input into fields on whitespace; to use a different delimiter, use -F ':' where : is the new delimiter. Implementing this as an option to the script makes it slightly longer, so I'm leaving that as an exerc...
Best documentation for Boost:asio?
...as how to develop your own custom asio extensions. Really fantastic effort by Boris Schäling!
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