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Python Empty Generator Function
...cede it with return to terminate the generator before yielding anything.
>>> def f():
... return
... yield
...
>>> list(f())
[]
I'm not sure it's that much better than what you have -- it just replaces a no-op if statement with a no-op yield statement. But it is more id...
Building with Lombok's @Slf4j and Intellij: Cannot find symbol log
...the "Enable annotation processing" checkbox is ticked under:
Preferences > Compiler > Annotation Processors
Note: starting with IntelliJ 2017, the "Enable Annotation Processing" checkbox has moved to:
Settings > Build, Execution, Deployment > Compiler > Annotation Processors
...
Should I use Java's String.format() if performance is important?
... prev_time = System.currentTimeMillis();
long time;
for( i = 0; i< 100000; i++){
String s = "Blah" + i + "Blah";
}
time = System.currentTimeMillis() - prev_time;
System.out.println("Time after for loop " + time);
prev_time = System.currentTimeMillis();
for( ...
how to change any data type into a string in python
...avior of str:
def __repr__(self):
return "Some descriptive string"
>>> myObj in your interactions pane, or repr(myObj), will result in myObj.__repr__()
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improve this answer
...
How do I trim whitespace from a string?
...ive spaces? If the second, then strings already have a .strip() method:
>>> ' Hello '.strip()
'Hello'
>>> ' Hello'.strip()
'Hello'
>>> 'Bob has a cat'.strip()
'Bob has a cat'
>>> ' Hello '.strip() # ALL consecutive spaces at both ends removed
'Hello'
If y...
Edit and Continue: “Changes are not allowed when…”
...)
Uncheck the Optimize Code checkbox for Debug Mode in Project Properties->Debug
Uncheck Enable Optimizations in Advanced Compiler Settings
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Want to find records with no associated records in Rails
...
Better:
Person.includes(:friends).where( :friends => { :person_id => nil } )
For the hmt it's basically the same thing, you rely on the fact that a person with no friends will also have no contacts:
Person.includes(:contacts).where( :contacts => { :person_id => ...
Python: changing value in a tuple
...hange but on few occasions they might want to. For a small but non-zero length sequence, the memory consumption of tuple (60-bytes for one-element) vs list (104 bytes) and make a difference. Another use case is for namedtuples since namedlist doesn't natively exist.
– Michael S...
Maven plugins can not be found in IntelliJ
...
@nil96 File -> Preferences -> Build, Execution, Deployment -> Build Tools -> Maven
– Radu Ciobanu
Jul 26 '19 at 2:28
...
Code for Greatest Common Divisor in Python [closed]
...
It's in the standard library.
>>> from fractions import gcd
>>> gcd(20,8)
4
Source code from the inspect module in Python 2.7:
>>> print inspect.getsource(gcd)
def gcd(a, b):
"""Calculate the Greatest Common Divisor of a a...