Expected Behaviour
When invoked, the debounced function is invoked after wait milliseconds.
Current Behaviour
When invoked, the debounced function is invoked immediately, not after wait milliseconds.
Example
import time
import pydash
t = time.time()
func = pydash.debounce(time.time, 10000)
print(func() - t) # 2.86102294921875e-05
time.sleep(5)
print(func() - t) # 2.86102294921875e-05
Reason
As can be seen in the code below, taken from the source, there is no deferred execution. This is correct for a throttle function, but not for a debounce function, at least in the namesake project Lodash.
class Debounce(object):
"""Wrap a function in a debounce context."""
def __init__(self, func, wait, max_wait=False):
self.func = func
self.wait = wait
self.max_wait = max_wait
self.last_result = None
# Initialize last_* times to be prior to the wait periods so that func
# is primed to be executed on first call.
self.last_call = pyd.now() - self.wait
self.last_execution = pyd.now() - max_wait if pyd.is_number(max_wait) else None
def __call__(self, *args, **kwargs):
"""
Execute :attr:`func` if function hasn't been called witinin last :attr:`wait` milliseconds
or in last :attr:`max_wait` milliseconds.
Return results of last successful call.
"""
present = pyd.now()
if (present - self.last_call) >= self.wait or (
self.max_wait and (present - self.last_execution) >= self.max_wait
):
self.last_result = self.func(*args, **kwargs)
self.last_execution = present
self.last_call = present
return self.last_result
Expected Behaviour
When invoked, the debounced function is invoked after
waitmilliseconds.Current Behaviour
When invoked, the debounced function is invoked immediately, not after
waitmilliseconds.Example
Reason
As can be seen in the code below, taken from the source, there is no deferred execution. This is correct for a throttle function, but not for a debounce function, at least in the namesake project Lodash.