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How important is the order of columns in indexes?
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Look at an index like this:
Cols
1 2 3
-------------
| | 1 | |
| A |---| |
| | 2 | |
|---|---| |
| | | |
| | 1 | 9 |
| B | | |
| |---| |
| | 2 | |
| |---| |
| | 3 | |
|---|---| |
See how restricting on A first, as ...
JavaScript checking for null vs. undefined and difference between == and ===
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answered Feb 24 '11 at 8:15
T.J. CrowderT.J. Crowder
825k153153 gold badges15111511 silver badges15531553 bronze badges
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Return only string message from Spring MVC 3 Controller
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192
Annotate your method in controller with @ResponseBody:
@RequestMapping(value="/controller", met...
Stop Mongoose from creating _id property for sub-document array items
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edited May 9 '14 at 11:52
topek
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answered Jun 2...
Error while pull from git - insufficient permission for adding an object to repository database .git
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260
Assuming @ChrisHayes is right about an accidental sudo, this should fix it. From inside your r...
JSON left out Infinity and NaN; JSON status in ECMAScript?
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answered Sep 14 '09 at 21:34
olliejolliej
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How can I update NodeJS and NPM to the next versions?
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Flexbox: center horizontally and vertically
....flex-item {
background-color: tomato;
padding: 5px;
width: 20px;
height: 20px;
margin: 10px;
line-height: 20px;
color: white;
font-weight: bold;
font-size: 2em;
text-align: center;
}
<div class="flex-container">
<div class="row"> ...
Can you use Microsoft Entity Framework with Oracle? [closed]
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27
DevArt's OraDirect provider now supports entity framework. See http://devart.com/news/2008/dire...