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Why is '+' not understood by Python sets?
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Python sets don't have an implementation for the + operator.
You can use | for set union and & for set intersection.
Sets do implement - as set difference. You can also use ^ for symmetric set difference (i.e., it will ...
Checking for empty arrays: count vs empty
This question on ' How to tell if a PHP array is empty ' had me thinking of this question
12 Answers
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A regex to match a substring that isn't followed by a certain other substring
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Try:
/(?!.*bar)(?=.*foo)^(\w+)$/
Tests:
blahfooblah # pass
blahfooblahbarfail # fail
somethingfoo # pass
shouldbarfooshouldfail # fail
barfoofail # fail
Regular expression explanation
NODE EXPLANATION
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How is TeamViewer so fast?
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The most fundamental thing here probably is that you don't want to transmit static images but only changes to the images, which essentially is analogous to video stream.
My best guess is some very efficient (and heavily specialized and optimized) motion co...
Create SQL script that create database and tables
I have a SQL database and tables that I would like to replicate in another SQL Server. I would like to create a SQL script that creates the database and tables in a single script.
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Why is using 'eval' a bad practice?
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Yes, using eval is a bad practice. Just to name a few reasons:
There is almost always a better way to do it
Very dangerous and insecure
Makes debugging difficult
Slow
In your case you can use setattr instead:
class Song:
"""The class to stor...
How can I debug git/git-shell related problems?
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For even more verbose output use following:
GIT_CURL_VERBOSE=1 GIT_TRACE=1 git pull origin master
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Why are dashes preferred for CSS selectors / HTML attributes?
In the past I've always used underscores for defining class and id attributes in HTML. Over the last few years I changed over to dashes, mostly to align myself with the trend in the community , not necessarily because it made sense to me.
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Unable to execute dex: method ID not in [0, 0xffff]: 65536
...s of the dex erros before, but this one is new. clean/restart etc won't help. Library projects seems intact and dependency seems to be linked correctly.
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CSS customized scroll bar in div
...croll bar via CSS (Cascading Style Sheets) for one div and not the whole page?
18 Answers
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