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Random row selection in Pandas dataframe
...he tip on difference. Though, I still prefer writing the slicing so that I read it as indices "not in the index of my sample". Is there a performance increase with difference()?
– ryanjdillon
May 4 '18 at 7:50
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Which UUID version to use?
Which version of the UUID should you use? I saw a lot of threads explaining what each version entails, but I am having trouble figuring out what's best for what applications.
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Returning value that was passed into a method
... so:
.Returns((string myval) => { return myval; });
Or slightly more readable:
.Returns<string>(x => x);
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What's the meaning of “=>” (an arrow formed from equals & greater than) in JavaScript?
...18. (I’ve included a partial list of supporting browsers below).
You can read more in the Mozilla documentation on arrow functions.
From the Mozilla documentation:
An arrow function expression (also known as fat arrow function) has a shorter syntax compared to function expressions and lexically b...
Bundle ID Suffix? What is it?
...the bundle ID is used by iOS to uniquely identify your application. Please read my answer. The bundle ID should follow reverse DNS format: com.something.somethingelse
– Jasarien
May 20 '11 at 8:17
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How do Google+ +1 widgets break out of their iframe?
...t forgery) token can be embedded in the request and the parent site cannot read this token and forge the request. So the iframe is an anti-CSRF measure that relies upon the Origin Inheritance rules to protect itself from a malicious parent.
From an attack perspective this is more like XSS (cross-s...
PSQLException: current transaction is aborted, commands ignored until end of transaction block
...othing is wrong.
//But remember, we are in a TRANSACTION! so keep reading.
System.out.println("statement.execute done");
statement.close();
}
catch (SQLException sqle)
{
System.out.println("keep on truckin, keep using " +
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Finding which process was killed by Linux OOM killer
...er chooses a process to kill based on some heuristics (it's an interesting read: http://lwn.net/Articles/317814/ ).
4 Answ...
How can I get a precise time, for example in milliseconds in Objective-C?
... @nevyn you just saved my internet speed test, ty! Damn I'm glad I read the comments before copy pasting code heh
– Albert Renshaw
Oct 31 '17 at 0:01
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How can I select rows with most recent timestamp for each key value?
.... latest timestamp) for each unique sensor ID.
In my use case I have ~10M readings from ~1K sensors, so trying to join the table with itself on a timestamp-based filter is very resource-intensive; the above takes a couple of seconds.
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