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log4j configuration via JVM argument(s)?
What variables do I have to set/pass as arguments to the JVM to get log4j to run properly? And by properly I mean not complain and print to the console. Can I see a typical example?
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Should I use #define, enum or const?
...he typedef in C++.
enum TRecordType { xNew = 1, xDeleted = 2, xModified = 4, xExisting = 8,
Create another member for an invalid state. This can be useful as error code; for example, when you want to return the state but the I/O operation fails. It is also useful for debugging; use it in initiali...
Replacing blank values (white space) with NaN in pandas
... since pandas 0.13:
df = pd.DataFrame([
[-0.532681, 'foo', 0],
[1.490752, 'bar', 1],
[-1.387326, 'foo', 2],
[0.814772, 'baz', ' '],
[-0.222552, ' ', 4],
[-1.176781, 'qux', ' '],
], columns='A B C'.split(), index=pd.date_range('2000-01-01','2000-01-06'))
# ...
Remove all the elements that occur in one list from another
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edited Aug 23 '19 at 21:24
Trilarion
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answered N...
How can you dynamically create variables via a while loop? [duplicate]
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141
Unless there is an overwhelming need to create a mess of variable names, I would just use a dic...
Determine which MySQL configuration file is being used
...ld.
Among all the other system calls, you will find something like:
stat64("/etc/my.cnf", 0xbfa3d7fc) = -1 ENOENT (No such file or directory)
stat64("/etc/mysql/my.cnf", {st_mode=S_IFREG|0644, st_size=4227, ...}) = 0
open("/etc/mysql/my.cnf", O_RDONLY|O_LARGEFILE) = 3
So, as you can see..i...
How do I run only specific tests in Rspec?
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zeteticzetetic
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How to obtain the last path segment of a URI
...t what you are looking for:
URI uri = new URI("http://example.com/foo/bar/42?param=true");
String path = uri.getPath();
String idStr = path.substring(path.lastIndexOf('/') + 1);
int id = Integer.parseInt(idStr);
alternatively
URI uri = new URI("http://example.com/foo/bar/42?param=true");
String[...
Difference between Covariance & Contra-variance
...mal ⇒ Animal
Banana ⇒ Banana
Banana ⇒ Fruit
Fruit ⇒ Fruit
In C# 4, which supports covariant assignment compatibility of certain interfaces, there is an assignment compatibility relationship between pairs of types in the second set:
IE<Tiger> ⇒ IE<Tiger>
IE<Tiger> ...
C read file line by line
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edited Nov 26 '18 at 15:42
gsamaras
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answ...