大约有 15,000 项符合查询结果（耗时：0.0285秒） [XML]
Fluent and Query Expression — Is there any benefit(s) of one over other?
...and it saves me tons of time, and lines of code. However, the fluent syntax seems to come much more natural to me than the query expression syntax.
...
GroupBy pandas DataFrame and select most common value
...: ['NY','New','Spb','NY']})
source.groupby(['Country','City']).agg(lambda x:x.value_counts().index[0])
In case you are wondering about performing other agg functions in the .agg()
try this.
# Let's add a new col, account
source['account'] = [1,2,3,3]
source.groupby(['Country','City']).agg(mod ...
Handling click events on a drawable within an EditText
I have added an image right of the text in an EditText widget, using the following XML:
39 Answers
...
How to document class attributes in Python? [closed]
...lass attributes, or any sort of attributes, for that matter. What is the expected and supported way, should there be one, to document these attributes? Currently I'm doing this sort of thing:
...
Android splash screen image sizes to fit all devices
...ea
what size to put in every drawable folder ( ldpi , mdpi , hdpi , and xhdpi ). My application is supposed to run good and beautiful on all phones and tablets. What sizes (in pixels) should I create so the splash displays nice on all screens?
...
Go > operators
Could someone please explain to me the usage of << and >> in Go? I guess it is similar to some other languages.
...
What does “dereferencing” a pointer mean?
Please include an example with the explanation.
6 Answers
6
...
Null vs. False vs. 0 in PHP
...The var has not been initialized.
False means "not true in a boolean context". Used to explicitly show you are dealing with logical issues.
0 is an int. Nothing to do with the rest above, used for mathematics.
Now, what is tricky, it's that in dynamic languages like PHP, all of them have a value ...
Is there a better way to iterate over two lists, getting one element from each list for each iterati
...
In Python 2.x you might consider itertools.izip instead (zip does the same thing in Python 3.x).
– Nicholas Riley
Dec 17 '09 at 2:08
...