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How do you match only valid roman numerals with a regular expression?
...0,3})$
Breaking it down, M{0,4} specifies the thousands section and basically restrains it to between 0 and 4000. It's a relatively simple:
0: <empty> matched by M{0}
1000: M matched by M{1}
2000: MM matched by M{2}
3000: MMM matched by M{3}
4000: MMMM matched by M...
What is Java Servlet?
...a particular type of network request - most commonly an HTTP request. Basically servlets are usually used to implement web applications - but there are also various frameworks which operate on top of servlets (e.g. Struts) to give a higher-level abstraction than the "here's an HTTP request, write to...
Java Array Sort descending?
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You could use this to sort all kind of Objects
sort(T[] a, Comparator<? super T> c)
Arrays.sort(a, Collections.reverseOrder());
Arrays.sort() cannot be used directly to sort primitive arrays in descending order. If you try to call the Arrays...
Sell me on const correctness
...ll, using const is good practice because...
It protects you from accidentally changing variables that aren't intended be changed,
It protects you from making accidental variable assignments, and
The compiler can optimize it. For instance, you are protected from
if( x = y ) // whoops, meant if(...
Appending to an empty DataFrame in Pandas?
... here ;)
– refuzee
Jun 30 '15 at 16:32
7
No clue why Pandas examples don't show that. Thanks for ...
Is it safe to delete an object property while iterating over them?
... apologies.
– TomW
Oct 24 '13 at 11:32
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SQL Developer is returning only the date, not the time. How do I fix this?
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answered May 16 '15 at 12:32
Upendra GughaneUpendra Gughane
47144 silver badges66 bronze badges
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How do I convert an existing callback API to promises?
I want to work with promises but I have a callback API in a format like:
20 Answers
20...
What is a reasonable order of Java modifiers (abstract, final, public, static, etc.)?
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1 : public
2 : private
4 : protected
8 : static
16 : final
32 : synchronized
64 : volatile
128 : transient
256 : native
512 : interface
1024 : abstract
2048 : strictfp
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Git: See my last commit
...e git log -1, git show, and git diff to get the same sort of output. Personally, I tend to use git show <rev> when looking at individual revisions.
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