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How to check if element is visible after scrolling?
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“is” operator behaves unexpectedly with integers
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How can I create Min stl priority_queue?
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Use std::greater as the comparison function:
std::priority_queue<int, std::vector<int&g...
npm check and update package if needed
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How to split data into training/testing sets using sample function
...row(mtcars))
## set the seed to make your partition reproducible
set.seed(123)
train_ind <- sample(seq_len(nrow(mtcars)), size = smp_size)
train <- mtcars[train_ind, ]
test <- mtcars[-train_ind, ]
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Test if lists share any items in python
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Because sets are stored using a hash table in Python, searching them is O(1) (see here for more information about complexity of operators in Python). Theoretically, this is O(n+m) on average for n and m objects in lists a and b. But 1) it must first create sets out of the lists, which can take a no...
Writing a git post-receive hook to deal with a specific branch
... stdin, not from a command line argument, you need to use read instead of $1 $2 $3.
The post-receive hook can receive multiple branches at once (for example if someone does a git push --all), so we also need to wrap the read in a while loop.
A working snippet looks something like this:
#!/bin/bas...
Convert Django Model object to dict with all of the fields intact
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An algorithm for inflating/deflating (offsetting, buffering) polygons
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I forgot the password I entered during postgres installation
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