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mongoDB/mongoose: unique if not null
...ield with a value of null, only multiple docs without an email field.
See http://docs.mongodb.org/manual/core/index-sparse/
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Which is best way to define constants in android, either static class, interface or xml resource?
...2017.
*/
public class Constant {
public static final String SERVER = "http://192.168.0.100/bs.dev/nrum";
// public static final String SERVER = "http://192.168.100.2/bs.dev/nrum";
public static final String API_END = SERVER + "/dataProvider";
public static final String NEWS_API = API...
ASP.NET MVC controller actions that return JSON or partial html
...Include the JsonRequestBehavior.AllowGet; without this MVC was returning a HTTP 500 error (with dataType: json specified on the client).
Add cache: false to the $.ajax call, otherwise you will ultimately get HTTP 304 responses (instead of HTTP 200 responses) and the server will not process your requ...
How to add screenshot to READMEs in github repository?
...mbed an image that's hosted elsewhere, you can use a full URL
GitHub recommend that you use relative links with the ?raw=true parameter to ensure forked repos point correctly.
The raw=true parameter is there in order to ensure the image y...
PHP: Convert any string to UTF-8 without knowing the original character set, or at least try
...distinguishable occurrences.
Take the ISO-8859-1 charset vs ISO-8859-15 ( http://en.wikipedia.org/wiki/ISO/IEC_8859-15#Changes_from_ISO-8859-1 )
There's only a handful of different characters, and to make it worse, they're represented by the same bytes. There is no way to detect, being given a str...
convert_tz returns null
...ql
In Windows environment,
1. download Time zone description tables from http://dev.mysql.com/downloads/timezones.html
2. Stop MySQL server
3. Put then inside Mysql installation package (ie. C:\Program Files\MySQL\data\mysql)`
4. Start MySQL server
..Your work is finished..
If still you are g...
CSS3 Transparency + Gradient
...dern browsers (starting from Chrome 26, Opera 12.1, IE 10 and Firefox 16): http://caniuse.com/#feat=css-gradients
background: linear-gradient(to bottom, rgba(0, 0, 0, 1), rgba(0, 0, 0, 0));
This renders a gradient, starting from solid black at the top, to fully transparent at the bottom.
Documen...
Get the height and width of the browser viewport without scrollbars using jquery?
...
$(window).height();
$(window).width();
More info
http://api.jquery.com/height/
http://api.jquery.com/width/
Using jQuery is not essential for getting those values, however. Use
document.documentElement.clientHeight;
document.documentElement.clientWidth;
to get sizes e...
Why do my list item bullets overlap floating elements
...
position: relative;
left: 1em;
padding-right: 1em;
}
http://jsfiddle.net/mblase75/TJELt/
I prefer this technique, since it works when the list needs to flow around the floating image, while the overflow: hidden technique will not. However, it's also necessary to add padding-ri...
Disable hover effects on mobile browsers
...(i.e on a device with both mouse and touch interface).
Further Reading
http://jsfiddle.net/macfreek/24Z5M/. Test the above solution for yourself in this sandbox.
http://www.macfreek.nl/memory/Touch_and_mouse_with_hover_effects_in_a_web_browser. This same answer, with a bit more background.
https...