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What is the most efficient way to create a dictionary of two pandas Dataframe columns?
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I found a faster way to solve the problem, at least on realistically large datasets using:
df.set_index(KEY).to_dict()[VALUE]
Proof on 50,000 rows:
df = pd.DataFrame(np.random.randint(32, 120, 100000).reshape(50000,2),columns=list('AB'))
df['A'] = df['A'].apply(chr)
%timeit dict(zip(df...
Undo a particular commit in Git that's been pushed to remote repos
... And use the -n switch if you want the code back, but not automatically committed in again
– jaygooby
Nov 22 '11 at 12:09
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Showing Travis build status in GitHub repo
...pdate. Service hooks are enabled- otherwise I wouldn't get Travis build at all?
– andig
Nov 6 '13 at 11:19
2
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Check whether HTML element has scrollbars
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If overflow is visible or hidden, there usually are no scrollbars.
– Hubert Grzeskowiak
Jul 21 '16 at 18:27
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Linq to SQL how to do “where [column] in (list of values)”
... @KiranSolkar: Then presumably codeIDs would be a List<int>, and all would be fine.
– Jon Skeet
Dec 3 '16 at 8:59
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Entity Framework .Remove() vs. .DeleteObject()
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It's not generally correct that you can "remove an item from a database" with both methods. To be precise it is like so:
ObjectContext.DeleteObject(entity) marks the entity as Deleted in the context. (It's EntityState is Deleted after th...
What's the difference between and
...pect.
There are a few cases with generics where extends Object is not actually redundant. For example, <T extends Object & Foo> will cause T to become Object under erasure, whereas with <T extends Foo> it will become Foo under erasure. (This can matter if you're trying to retain com...
Is Random class thread safe?
...share one instance of the Random class between multiple threads? And to call nextInt(int) from multiple threads in particular?
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ASP.NET MVC Razor: How to render a Razor Partial View's HTML inside the controller action
...ethods available in an MVC controller class. Using a third party library called "RazorEngine" you can use .Net file IO to get the contents of the razor file and call
string html = Razor.Parse(razorViewContentString, modelObject);
Get the third party library here.
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How to compare dates in datetime fields in Postgresql?
...ime (i.e: 2013-05-03 12:20:00). This column has the value as timestamp for all rows currently and have the same date part(2013-05-03) but difference in time part.
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