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When is .then(success, fail) considered an antipattern for promises?
I had a look at the bluebird promise FAQ , in which it mentions that .then(success, fail) is an antipattern . I don't quite understand its explanation as for the try and catch.
What's wrong with this the following?
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MySQL order by before group by
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Using an ORDER BY in a subquery is not the best solution to this problem.
The best solution to get the max(post_date) by author is to use a subquery to return the max date and then join that to your table on both the post_author and the max date.
The so...
How to remove a key from a Python dictionary?
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To delete a key regardless of whether it is in the dictionary, use the two-argument form of dict.pop():
my_dict.pop('key', None)
This will return my_dict[key] if key exists in the dictionary, and None otherwise. If the second parameter is not specified (ie. my_di...
What is the use of hashCode in Java?
In Java, obj.hashCode() returns some value. What is the use of this hash code in programming?
9 Answers
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How to calculate moving average without keeping the count and data-total?
... a moving cumulative average without storing the count and total data that is received so far.
8 Answers
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What is the id( ) function used for?
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Your post asks several questions:
What is the number returned from the function?
It is "an integer (or long integer) which is guaranteed to be unique and constant for this object during its lifetime." (Python Standard Library - Built-in Functions) A unique numb...
TypeError: 'module' object is not callable
Why am I getting this error?
I'm confused.
11 Answers
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How many parameters are too many? [closed]
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When is something considered so obscene as to be something that can be regulated despite the 1st Amendment guarantee to free speech? According to Justice Potter Stewart, "I know it when I see it." The same holds here.
I hate ma...
For a boolean field, what is the naming convention for its getter/setter?
...se you have
boolean active;
Accessors method would be
public boolean isActive(){return this.active;}
public void setActive(boolean active){this.active = active;}
See Also
Java Programming/Java Beans
Code Conventions for the Java Programming Language
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Sell me on const correctness
So why exactly is it that it's always recommended to use const as often as possible? It seems to me that using const can be more of a pain than a help in C++. But then again, I'm coming at this from the python perspective: if you don't want something to be changed, don't change it. So with that ...