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How to find the kth largest element in an unsorted array of length n in O(n)?
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A quick Google on that ('kth largest element array') returned this: http://discuss.joelonsoftware.com/default.asp?interview.11.509587.17
"Make one pass through tracking the three largest values so far."
(it was specifically for 3d largest)
and this answer:
Build a heap/priority queue. ...
How to clear the interpreter console?
...lly keep a console window open with the Python interpreter running to test commands, dir() stuff, help() stuff , etc.
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Combine two or more columns in a dataframe into a new column with a new name
For example if I have this:
8 Answers
8
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sed one-liner to convert all uppercase to lowercase?
I have a textfile in which some words are printed in ALL CAPS. I want to be able to just convert everything in the textfile to lowercase, using sed . That means that the first sentence would then read, 'i have a textfile in which some words are printed in all caps.'
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Update a column value, replacing part of a string
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UPDATE yourtable
SET url = REPLACE(url, 'http://domain1.com/images/', 'http://domain2.com/otherfolder/')
WHERE url LIKE ('http://domain1.com/images/%');
relevant docs: http://dev.mysql.com/doc/refman/5.5/en/string-functions.html#function_replace
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Working Soap client example
... The example below requests from the Web Service at:
http://www.webservicex.net/uszip.asmx?op=GetInfoByCity
To call other WS, change the parameters below, which are:
- the SOAP Endpoint URL (that is, where the service is responding from)
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how to detect search engine bots with php?
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Here's a Search Engine Directory of Spider names
Then you use $_SERVER['HTTP_USER_AGENT']; to check if the agent is said spider.
if(strstr(strtolower($_SERVER['HTTP_USER_AGENT']), "googlebot"))
{
// what to do
}
sha...
How to get an element by its href in jquery?
... use jQuery's attribute selector for that.
var linksToGoogle = $('a[href="http://google.com"]');
Alternatively, if your interest is rather links starting with a certain URL, use the attribute-starts-with selector:
var allLinksToGoogle = $('a[href^="http://google.com"]');
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Why are C# interface methods not declared abstract or virtual?
...eUploader: {
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Why aren't variables declared in “try” in scope in “catch” or “finally”?
In C# and in Java (and possibly other languages as well), variables declared in a "try" block are not in scope in the corresponding "catch" or "finally" blocks. For example, the following code does not compile:
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