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Added join_structured_arrays

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This commit is contained in:
Grant Sanderson
2020-02-04 15:24:40 -08:00
parent 13b69a14d8
commit 24d3ba8680
1 changed files with 17 additions and 3 deletions
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20
manimlib/utils/iterables.py
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@ -56,9 +56,8 @@ def batch_by_property(items, property_func):
def add_batch_prop_pair(batch): def add_batch_prop_pair(batch):
if len(batch) > 0: if len(batch) > 0:
batch_prop_pairs.append( prop = property_func(batch[0])
(batch, property_func(batch[0])) batch_prop_pairs.append((batch, prop))
)
curr_batch = [] curr_batch = []
curr_prop = None curr_prop = None
for item in items: for item in items:
@ -115,6 +114,21 @@ def remove_nones(sequence):
return [x for x in sequence if x] return [x for x in sequence if x]
def join_structured_arrays(*arrays):
assert(len(arrays) > 0)
result = np.zeros(
sum([len(arr) for arr in arrays]),
dtype=arrays[0].dtype
)
lh = 0
for array in arrays:
rh = lh + len(array)
result[lh:rh] = array
lh = rh
return result
# Note this is redundant with it.chain # Note this is redundant with it.chain