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When do you use map vs flatMap in RxJava?
...another.
flatMap transform one event to zero or more event. (this is taken from IntroToRx)
As you want to transform your json to an object, using map should be enough.
Dealing with the FileNotFoundException is another problem (using map or flatmap wouldn't solve this issue).
To solve your Excepti...
Access mysql remote database from command line
I have a server with Rackspace. I want to access the database from my local machine command line.
17 Answers
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Storing DateTime (UTC) vs. storing DateTimeOffset
I usually have an "interceptor" that right before reading/writing from/to the database does DateTime conversion (from UTC to local time, and from local time to UTC), so I can use DateTime.Now (derivations and comparisions) throughout the system without worrying about time zones.
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What is the difference between “git init” and “git init --bare”?
...on't want/need a "logically central" repository. One would prefer git pull from the other repositories in that case. This avoids the objections that git has when pushing to non-bare repositories.
Hope this helps
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What is the difference between compare() and compareTo()?
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From JavaNotes:
a.compareTo(b):
Comparable interface : Compares values and returns an int which tells if the values compare less than, equal, or greater than.
If your class objects have a natural order, implement the Compar...
What is the difference between 'my' and 'our' in Perl?
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Great question: How does our differ from my and what does our do?
In Summary:
Available since Perl 5, my is a way to declare non-package variables, that are:
private
new
non-global
separate from any package, so that the variable cannot be accessed in the ...
How to remove new line characters from a string?
... I had a similar problem where I needed also to remove newlines from my string. I tried to do it with string.Replace, didn't work. When I used Regex.Replace with the exact same regular expression string as the parameter, it worked. Thanks.
– instanceof
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Arrays vs Vectors: Introductory Similarities and Differences [closed]
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arrays:
are a builtin language construct;
come almost unmodified from C89;
provide just a contiguous, indexable sequence of elements; no bells and whistles;
are of fixed size; you can't resize an array in C++ (unless it's an array of POD and it's allocated with malloc);
their size must be ...
Strip whitespace from jsp output
How can I strip out extra whitespace from jsp pages' output? Is there a switch I can flip on my web.xml? Is there a Tomcat specific setting?
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What is a difference between
...tor uses the ? extends E form so it guarantees that when it fetches values from the collection, they will all be E or some subclass (i.e. it's compatible). The drainTo method is trying to put values into the collection, so the collection has to have an element type of E or a superclass.
As an exam...