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How to import multiple .csv files at once?
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274
Something like the following should result in each data frame as a separate element in a singl...
What is the fastest or most elegant way to compute a set difference using Javascript arrays?
...if don't know if this is most effective, but perhaps the shortest
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(function(x) { return B.indexOf(x) < 0 })
console.log(diff);
Updated to ES6:
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(x => !B.includes(x) );
console.log(diff)...
Are GUID collisions possible?
I'm working on a database in SQL Server 2000 that uses a GUID for each user that uses the app it's tied to. Somehow, two users ended up with the same GUID. I know that microsoft uses an algorithm to generate a random GUID that has an extremely low chance of causing collisons, but is a collision stil...
Setting the selected value on a Django forms.ChoiceField
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answered Mar 20 '09 at 9:04
TomTom
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Regex to match string containing two names in any order
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265
You can do checks using lookarounds:
^(?=.*\bjack\b)(?=.*\bjames\b).*$
Test it.
This appro...
Why does Python print unicode characters when the default encoding is ASCII?
From the Python 2.6 shell:
6 Answers
6
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Checkout old commit and make it a new commit [duplicate]
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221
git rm -r .
git checkout HEAD~3 .
git commit
After the commit, files in the new HEAD will be...
How do I parse a URL query parameters, in Javascript? [duplicate]
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2 Answers
2
Active
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Difference between HashMap, LinkedHashMap and TreeMap
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1182
All three classes implement the Map interface and offer mostly the same functionality. The most ...