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Big O, how do you calculate/approximate it?
Most people with a degree in CS will certainly know what Big O stands for .
It helps us to measure how well an algorithm scales.
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How does JavaScript handle AJAX responses in the background?
... example).
The native code networking that lies under the ajax call will know when the ajax response is done and an event will get added to the javascript event queue. How the native code knows when the ajax call is done depends upon the implementation. It may be implemented with threads or it ma...
Access an arbitrary element in a dictionary in Python
...; (key, value) tuple of "first" element
Please note that (at best of my knowledge) Python does not guarantee that 2 successive calls to any of these methods will return list with the same ordering. This is not supported with Python3.
in Python 3:
list(my_dict.keys())[0] -> key of "first" ...
Using R to download zipped data file, extract, and import data
... See help(gzfile) -- I was thinking that the gzip protocol may now uncompress (stone old) .z files too now that the patent has long expired. It may not. Who uses .z anyways? The 1980s called, they want their compression back ;-)
– Dirk Eddelbuettel
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Subtract days from a date in JavaScript
Does anybody know of an easy way of taking a date (e.g. Today) and going back X days?
32 Answers
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What are the differences between the different saving methods in Hibernate?
..., when to use which, and why isn't there just one intelligent method that knows when to use what?
10 Answers
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Access mysql remote database from command line
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simply put this on terminal at ubuntu:
mysql -u username -h host -p
Now hit enter
terminal will ask you password, enter the password and you are into database server
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Unable to authenticate with Git Bash to Visual Studio Team Services
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Thanks for this! Any one know how to store the credentials so I don't have to enter them over and over?
– Erick Brown
Dec 3 '14 at 3:50
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How to center an iframe horizontally?
...t;
<iframe></iframe>
</div>
It works because it is now inside a block element.
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Whitespace Matching Regex - Java
...code */
String not_whitespace_charclass = "[^" + whitespace_chars + "]";
Now you can use whitespace_charclass + "+" as the pattern in your replaceAll.
Sorry ’bout all that. Java’s regexes just don’t work very well on its own native character set, and so you really have to jump through exo...