On Tue, 2017-03-14 at 16:12 +0100, Daniel Kozak via Digitalmars-d-learn wrote: > […] > > Can you post some example? Maybe in python, kotlin whatever so I can > better understand what you want
In my head I had something such as Groovy's
files = new File('test-data').listFiles().collect{it.name}
println files.groupBy({ it.split('_')[0]})
The I remembered that itertools.groupby in Python behaves like D's
std.algorithm.iteration.chunkBy and not like Groovy's groupBy. So in
Python you have to hack it with:
from collections import defaultdict
from os import listdir
from os.path import isfile, splitext
result = defaultdict(list)
files = tuple((item.split('_')[0], item) for item in listdir('test-data') if
isfile('test-data/' + item))
for p, v in files:
result[p] += [v]
print(result)
Given the seeming lack of Groovy-style groupBy, I guess I will have to
do something Python-like in D. Except I am not sure D has an equivalent
of defaultdict.
--
Russel.
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