Permutations in JavaScript?
If you notice, the code actually splits the chars into an array prior to do any permutation, so you simply remove the join and split operation
permutation
Finding all possible permutations of a given string in python
The itertools module has a useful method called permutations(). The documentation says: itertools.permutations(iterable[, r]) Return successive r length permutations of elements in the iterable. If r is not specified or is None, then r defaults to the length of the iterable and all possible full-length permutations are generated. Permutations are emitted in lexicographic sort order. So, if … Read more
C++ error: Undefined symbols for architecture x86_64
Your compiler error is coming from the fact that your signature for the forward declaration of _num_steps does not match the signature of your definition of _num_steps. the type of steps_list does not match Change your prototype line to:
Shuffle DataFrame rows
The idiomatic way to do this with Pandas is to use the .sample method of your dataframe to sample all rows without replacement: The frac keyword argument specifies the fraction of rows to return in the random sample, so frac=1 means return all rows (in random order). Note: If you wish to shuffle your dataframe in-place and reset the index, you could … Read more
How to generate all permutations of a list?
There’s a function in the standard-library for this: itertools.permutations. If for some reason you want to implement it yourself or are just curious to know how it works, here’s one nice approach, taken from http://code.activestate.com/recipes/252178/: A couple of alternative approaches are listed in the documentation of itertools.permutations. Here’s one: And another, based on itertools.product: