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Creating Multifield Indexes in Mongoose / MongoDB
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194
You call the index method on your Schema object to do that as shown here. For your case it wo...
Print commit message of a given commit in git
... "plumbing", but it'll do exactly what you want:
$ git log --format=%B -n 1 <commit>
If you absolutely need a "plumbing" command (not sure why that's a requirement), you can use rev-list:
$ git rev-list --format=%B --max-count=1 <commit>
Although rev-list will also print out the co...
Change one value based on another value in pandas
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186
One option is to use Python's slicing and indexing features to logically evaluate the places w...
Convert a list to a dictionary in Python
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Return a value if no rows are found in Microsoft tSQL
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How to filter Pandas dataframe using 'in' and 'not in' like in SQL
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891
You can use pd.Series.isin.
For "IN" use: something.isin(somewhere)
Or for "NOT IN": ~something....
Append column to pandas dataframe
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135
It seems in general you're just looking for a join:
> dat1 = pd.DataFrame({'dat1': [9,5]})...
How to get a specific output iterating a hash in Ruby?
...uts "#{key}-----"
puts array
end
Regarding order I should add, that in 1.8 the items will be iterated in random order (well, actually in an order defined by Fixnum's hashing function), while in 1.9 it will be iterated in the order of the literal.
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How to reorder data.table columns (without copying)
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Use setcolorder():
library(data.table)
x <- data.table(a = 1:3, b = 3:1, c = runif(3))
x
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