def filter(self, f, *args, **kwargs):
"""
Keeps only the elements where f(el)==True
"""
_f=partial(f, *args, **kwargs)
self[:]=filter(_f, self)
return self
def find(self, f, *args, **kwargs):
"""
Returns the first element matching the predicate 'f' else returns None
"""
_f=partial(f, *args, **kwargs)
for el in self:
if _f(el):
return el
def map(self, f, *args, **kwargs):
"""
Applies 'f' to all elements
returns 'self'
"""
_f=partial(f, *args, **kwargs)
self[:]=map(_f, self)
return self
def count(self, f, *args, **kwargs):
"""
Count pairs matching predicate
"""
_f=partial(f, *args, **kwargs)
count=0
for k,v in self.items():
if _f(k,v):
count=count+1
return count
def any(self, f, *args, **kwargs):
"""
Applies 'f' to all [k:v] pairs and expects at least 1 'True' result
"""
_f = partial(f, *args, **kwargs)
for x, y in self.items():
if _f(x, y):
return True
return False
def all(self, f, *args, **kwargs):
"""
Applies 'f' to all [k:v] pairs and expects 'True' for all results
"""
_f = partial(f, *args, **kwargs)
for x, y in self.items():
if not _f(x, y):
return False
return True
def all(self, f, *args, **kwargs):
"""
Applies 'f' to all elements and expects 'True' for all results
"""
_f=partial(f, *args, **kwargs)
for el in self:
if not _f(el):
return False
return True
def count(self, f, *args, **kwargs):
"""
Counts elements in the list matching 'f' predicate
"""
_f=partial(f, *args, **kwargs)
count=0
for el in self:
if _f(el):
count=count+1
return count
def any(self, f, *args, **kwargs):
"""
Applies 'f' to all elements and expects at least 1 'True' result
"""
_f=partial(f, *args, **kwargs)
for el in self:
if _f(el):
return True
return False
def map(self, f, *args, **kwargs):
"""
Applies 'f' for each [k,v] pair - 'f' must return (k,v) pair
"""
#_f = self._f(f, *args, **kwargs)
_f=partial(f, *args, **kwargs)
d=dic()
for k,v in self.items():
nk, nv=_f(k,v)
d[nk]=nv
self.clear()
return self.clear().update(d)
def tee(self, f, *args, **kwargs):
"""
Calls 'f' on self, returns self, keeps 'last value'
"""
self.last_value=partial(f, *args, **kwargs)(self)
return self
def do(self, f, *args, **kwargs):
"""
Calls 'f' on self, returns result
"""
return partial(f, *args, **kwargs)(self)
def reduce(self, f, *args, **kwargs):
"""
Reduce
"""
_f=partial(f, *args, **kwargs)
return reduce(_f, self)
