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What does O(log n) mean exactly?

...propriate spot in a new, empty phone book. For the below examples, we're now at the printer's office. Phone books are waiting to be mailed to each resident or business, and there's a sticker on each phone book identifying where it should be mailed to. Every person or business gets one phone book. ...
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How do you set a default value for a MySQL Datetime column?

... IMPORTANT EDIT: It is now possible to achieve this with DATETIME fields since MySQL 5.6.5, take a look at the other post below... Previous versions can't do that with DATETIME... But you can do it with TIMESTAMP: mysql> create table test (st...
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Notification click: activity already open

...es on top of it will be closed and this Intent will be delivered to the (now on top) old activity as a new Intent. For example, consider a task consisting of the activities: A, B, C, D. If D calls startActivity() with an Intent that resolves to the component of activity B, then C and D...
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How do I find out which keystore was used to sign an app?

...int (MD5): B3:4F:BE:07:AA:78:24:DC:CA:92:36:FF:AE:8C:17:DB Voila! we can now determined the apk has been signed with this keystore, and with the alias 'android_key'. Keytool is part of Java, so make sure your PATH has Java installation dir in it. ...
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Convert unix time to readable date in pandas dataframe

...sense. Pandas: Converting to Timestamps goes through it pretty nicely also now I know about to_datetime. – W A Carnegie Oct 7 '13 at 22:55 ...
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Is there a way to auto expand objects in Chrome Dev Tools?

...); } else { console.log(item); } } })(); Now running: expandedLog({ "glossary": { "title": "example glossary", "GlossDiv": { "title": "S", "GlossList": { "GlossEntry": { "ID": "SGML", ...
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Draw line in UIView

...extAddLineToPoint(context, 20.0f, 20.0f); //draw to this point // and now draw the Path! CGContextStrokePath(context); } share | improve this answer | follow ...
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iOS start Background Thread

... cool! didn't know this. Does this apply to [NSThread detachNewThreadSelector:@selector.... also? – Srikar Appalaraju Aug 14 '11 at 7:25 ...
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How do you access the matched groups in a JavaScript regular expression?

... @MichaelMikowski now you've just hidden your infinite loop, but your code will run slow. I'd argue that it's better to have code break in a bad way so you catch it in development. Putting some bs maximum iterations break in is sloppy. Hidin...
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Random “Element is no longer attached to the DOM” StaleElementReferenceException

...- page is refreshed, or element is removed and re-added element.click(); Now at the point where you're clicking the element, the element reference is no longer valid. It's close to impossible for WebDriver to make a good guess about all the cases where this might happen - so it throws up its hands...