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PHP 2021-11-21 04:41:18
laravel select subquery
In addition to @delmadord's answer and your comments: Currently there is no method to create subquery in FROM clause, so you need to manually use raw statement, then, if necessary, you will merge all the bindings: $sub = Abc::where(..)->groupBy(..); ... Add solution -
Python 2021-11-20 13:06:08
compter des valeur consecutives en python
>>> from itertools import groupby >>> def groups(l): ... return [sum(g) for i, g in groupby(l) if i == 1] ... >>> groups([0,1,0,0,0]) [1] >>> groups([0,0,1,1,0]) [2] >>> groups([1,1,0,1,... Add solution -
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Python 2021-11-19 13:08:32
count occurrences of one variable grouped by another python
>>> data = pd.DataFrame({'user_id' : ['a1', 'a1', 'a1', 'a2','a2','a2','a3','a3','a3'], 'product_id' : ['p1','p1','p2','p1','p1','p1','p2','p2','p3']}) >>> count_series = data.groupby(['user_id', 'product_id']).size() >>> count_... Add solution
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