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When does static class initialization happen?
...tialized? If I never instantiate a class, but I access a static field, are ALL the static blocks and private static methods used to instantiate private static fields called (in order) at that instant?
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Why are iframes considered dangerous and a security risk?
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As soon as you're displaying content from another domain, you're basically trusting that domain not to serve-up malware.
There's nothing wrong with iframes per se. If you control the content of the iframe, they're perfectly safe.
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pandas: filter rows of DataFrame with operator chaining
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That is a really nice solution - I wasn't even aware that you could jury-rig methods like that in python. A function like this would be really nice to have in Pandas itself.
– naught101
Mar 3 '17 at...
Plotting a list of (x, y) coordinates in python matplotlib
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x, y = zip(*li) is really elegant python code! i've been doing the more straight-forward two lines of code with a list compression on each line (like the original question)
– Trevor Boyd Smith
Aug 23 '18 at ...
Bash script processing limited number of commands in parallel
... the exit status of the last
command waited for. If a job spec is given, all processes in the job
are waited for. If no arguments are given, all currently active child
processes are waited for, and the return status is zero. If neither
jobspec nor pid specifies an active child process of the...
How can I edit a view using phpMyAdmin 3.2.4?
...ck on your view in the list on the left to browse its data and then scroll all the way to the bottom where you'll see a CREATE VIEW link. Click that.
Place a check in the OR REPLACE field.
In the VIEW name put the name of the view you are going to update.
In the AS field put the contents of the quer...
return query based on date
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You probably want to make a range query, for example, all items created after a given date:
db.gpsdatas.find({"createdAt" : { $gte : new ISODate("2012-01-12T20:15:31Z") }});
I'm using $gte (greater than or equals), because this is often used for date-only queries, where the t...
Function to return only alpha-numeric characters from string?
...ake an input string and return a sanitized version of it by stripping away all special characters leaving only alpha-numeric.
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How can I determine the type of an HTML element in JavaScript?
...toLowerCase() means you also need to make sure nodeName exists (if it's at all possible elt is not, in fact, an element): if (elt.nodeName && elt.nodeName.toLowerCase() === 'div') { ... }
– Erik Koopmans
Nov 6 '17 at 7:10
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About Python's built in sort() method
...mergesort that's still used in Java, and one can hope that Java will eventually switch to his recent port of timsort).
Some explanation of the Java port of timsort is here, the diff is here (with pointers to all needed files), the key file is here -- FWIW, while I'm a better C programmer than Java ...