def underride(a:tvstruct, b:tvstruct) -> tvstruct:
answer = tvstruct(a)
for k, v in b._nvs():
if k not in answer:
answer[k] = v
# answer._setdefault(k, v) # this doesn't respect insertion order!!
return answer
def override(a:tvstruct, b:tvstruct) -> tvstruct:
answer = tvstruct(a)
answer._update(b._nvs())
return answer
def override(a:pydict, b:tvstruct) -> pydict:
answer = dict(a)
answer.update(b._nvs())
return answer
def sort(x: tvstruct) -> tvstruct:
return tvstruct(sorted(x._nvs(), key=None, reverse=False))
def count(x:tvstruct) -> tCount:
return len(x._names())
def select(pm: tvstruct, f2) -> tvstruct:
filteredKVs = []
for k, v in pm._nvs():
if f2(k, v): filteredKVs.append((k, v))
return tvstruct(pm._t, filteredKVs)
def both(a:tvstruct, fn, b:tvstruct) -> pylist:
return a._nvs() \
>> both \
>> (lambda aFV, bFV: fn(aFV[0], aFV[1], bFV[0], bFV[1])) \
>> b._nvs()