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What is the meaning of “… …” token? i.e. double ellipsis operator on parameter pack
...mma is purely optional; §8.3.5/4 does say
Where syntactically correct and where “...” is not part of an abstract-declarator, “, ...” is synonymous with “...”.
This is within an abstract-declarator, [edit] but Johannes makes a good point that they are referring to an abstract-decla...
How to get year, month, day, hours, minutes, seconds and milliseconds of the current moment in Java?
How can I get the year, month, day, hours, minutes, seconds and milliseconds of the current moment in Java? I would like to have them as Strings .
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What is the relationship between Looper, Handler and MessageQueue in Android?
I have checked the official Android documentation/guide for Looper , Handler and MessageQueue . But I couldn't get it. I am new to android, and got very confused with these concepts.
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How to export all data from table to an insertable sql format?
... in a database (call it A_db ) in Microsoft SQL Server Management Studio, and there are 10 rows.
6 Answers
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What is the difference between Polymer elements and AngularJS directives?
... a new element.
On to questions!
What is the difference between Angular and Polymer?
We covered some of this in our Q&A video. In general, Polymer is a library that aims to use (and show how to use) Web Components. Its foundation is Custom Elements (e.g. everything you build is a web compone...
What do (lambda) function closures capture?
Recently I started playing around with Python and I came around something peculiar in the way closures work. Consider the following code:
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Assign pandas dataframe column dtypes
...you have to use the explicit conversions:
pd.to_datetime, pd.to_timedelta and pd.to_numeric
(As mentioned below, no more "magic", convert_objects has been deprecated in 0.17)
df = pd.DataFrame({'x': {0: 'a', 1: 'b'}, 'y': {0: '1', 1: '2'}, 'z': {0: '2018-05-01', 1: '2018-05-02'}})
df.dtypes
x ...
Difference between size_t and std::size_t
What are the differences between size_t and std::size_t in terms of where they are declared, when they should be used and any other differentiating features?
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Image Processing: Algorithm Improvement for 'Coca-Cola Can' Recognition
... sample below, with the can recognized in the green rectangle with scale and rotation.
23 Answers
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What are enums and why are they useful?
Today I was browsing through some questions on this site and I found a mention of an enum being used in singleton pattern about purported thread safety benefits to such solution.
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