大约有 1,600 项符合查询结果（耗时：0.0263秒） [XML]
C++ static virtual members?
...etObjectClassName(&yourObject));
return 0;
}
Addendum (Jan 12th 2019):
Instead of using the GetClassNameStatic() function, you can also define the the class name as a static member, even "inline", which IIRC works since C++11 (don't get scared by all the modifiers :)):
class MyObject : ...
Comparing date part only without comparing time in JavaScript
...
alert("date is future");
}
</script>
See it running...
Update 2019... free stuff...
Given the popularity of this answer, I've put it all in code. The following function returns a wrapped date object, and only exposes those functions that are safe to use with just-a-date™.
Call it with...
Stop Visual Studio from mixing line endings in files
...
In Visual Studio 2015 (this still holds in 2019 for the same value), check the setting:
Tools > Options > Environment > Documents > Check for consistent line endings on load
VS2015 will now prompt you to convert line endings when you open a file where th...
how do you filter pandas dataframes by multiple columns
...
length = 100_000
df = pd.DataFrame()
df['Year'] = np.random.randint(1950, 2019, size=length)
df['Gender'] = np.random.choice(['Male', 'Female'], length)
%timeit df.query('Gender=="Male" & Year=="2014" ')
%timeit df[(df['Gender']=='Male') & (df['Year']==2014)]
Results for 100,000 rows:
6...
How to access accelerometer/gyroscope data from Javascript?
...
The way to do this in 2019+ is to use DeviceOrientation API. This works in most modern browsers on desktop and mobile.
window.addEventListener("deviceorientation", handleOrientation, true);
After registering your event listener (in this ca...
How to import other Python files?
...
Is it still accurate in 2019? Is it python3 or 2?
– Sandburg
Jan 24 '19 at 11:34
|
show 2...
Put buttons at bottom of screen with LinearLayout?
... you're commenting on an answer that I gave more than 6(!) years ago. It's 2019, just use a ConstraintLayout.
– Ahmad
Jul 10 '19 at 22:13
add a comment
|
...
How to inherit from a class in javascript?
...
For those who reach this page in 2019 or after
With the latest version of the ECMAScript standard (ES6), you can use the keyword class.
Note that the class definition is not a regular object; hence there are no commas between class members.
To create an i...
How to convert local time string to UTC?
..., tz=timezone.utc)
for details see:
see: https://blog.ganssle.io/articles/2019/11/utcnow.html
original answer (from 2010):
The datetime module's utcnow() function can be used to obtain the current UTC time.
>>> import datetime
>>> utc_datetime = datetime.datetime.utcnow()
>>...
Literal suffix for byte in .NET?
...
Nor in VS 2019. As per the MSDN page cited above (updated 01/30/2018): No identifier type characters exist for the Boolean, Byte, Char, Date, Object, SByte, Short, UInteger, ULong, or UShort data types, or for any composite data types ...