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Time complexity of Sieve of Eratosthenes algorithm
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Your n/2 + n/3 + n/5 + … n/97 is not O(n), because the number of terms is not constant. [Edit after your edit: O(n2) is too loose an upper bound.] A loose upper-bound is n(1+1/2+1/3+1/4+1/5+1/6+…1/n) (sum of reciprocals of all numbers up to n), which ...
Run JavaScript when an element loses focus
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CanavarCanavar
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add a c...
Get the first N elements of an array?
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370
Use array_slice()
This is an example from the PHP manual: array_slice
$input = array("a", ...
SQLite Reset Primary Key Field
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Nick DandoulakisNick Dandoulakis
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CSS container div not getting height
...wer.
– Andrew Weir
May 1 '13 at 11:27
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@AndrewWeir I'll admit, until now, I hadn't been entirely...
What is the difference between origin and upstream on GitHub?
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837
This should be understood in the context of GitHub forks (where you fork a GitHub repo on GitHub...
What is the difference between os.path.basename() and os.path.dirname()?
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279
Both functions use the os.path.split(path) function to split the pathname path into a pair; (he...
Is JSON Hijacking still an issue in modern browsers?
... capture values passed to the [] or {} constructors in Firefox 21, Chrome 27, or IE 10. Here's a little test page, based on the main attacks described in http://www.thespanner.co.uk/2011/05/30/json-hijacking/:
(http://jsfiddle.net/ph3Uv/2/)
var capture = function() {
var ta = document.que...
How do I script a “yes” response for installing programs?
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P.T.P.T.
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Performing regex Queries with pymongo
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answered Feb 2 '11 at 17:26
EricEric
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