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Where should @Service annotation be kept? Interface or Implementation?
...nnotation. I have ServiceI and ServiceImpl such that ServiceImpl implements ServiceI . I'm confused here as to where should I keep the @Service annotation.
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How do I make a dotted/dashed line in Android?
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What is std::move(), and when should it be used?
...uctors, objects can have move constructors.
(And in addition to copy assignment operators, they have move assignment operators.)
The move constructor is used instead of the copy constructor, if the object has type "rvalue-reference" (Type &&).
std::move() is a cast that produces an rvalue-re...
Class.forName() vs ClassLoader.loadClass() - which to use for dynamic loading? [duplicate]
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They are quite different!
As stated in the documentation for Class.forName(String),
Returns the Class object associated with the class or interface with the given string name. Invoking this method is equivalent to: Class.forName(className, true, currentLoader)
(tru...
Remove a symlink to a directory
... sense. I never typed foo, I typed f<tab> and bash filled in a / for me.
– Matthew Scouten
Jan 5 '09 at 21:14
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Why can't I overload constructors in PHP?
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You can't overload ANY method in PHP. If you want to be able to instantiate a PHP object while passing several different combinations of parameters, use the factory pattern with a private constructor.
For example:
public MyClass {
private fu...
How to count TRUE values in a logical vector
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There are some problems when logical vector contains NA values.
See for example:
z <- c(TRUE, FALSE, NA)
sum(z) # gives you NA
table(z)["TRUE"] # gives you 1
length(z[z == TRUE]) # f3lix answer, gives you 2 (because NA indexing retur...
Configure apache to listen on port other than 80
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No, just the "This webpage is not available" annoying message. Just to clarify, port 80 works perfectly. Changing both the VirtualHost and the Listen doesn't solve it for me. (AWS ubuntu). B.T.W the reason I need it to listen to a different port is because I've also configured ...
How can I get dict from sqlite query?
... sqlite3
def dict_factory(cursor, row):
d = {}
for idx, col in enumerate(cursor.description):
d[col[0]] = row[idx]
return d
con = sqlite3.connect(":memory:")
con.row_factory = dict_factory
cur = con.cursor()
cur.execute("select 1 as a")
print cur.fetchone()["a"]
or follow the...
How do I syntax check a Bash script without running it?
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bash -n scriptname
Perhaps an obvious caveat: this validates syntax but won't check if your bash script tries to execute a command that isn't in your path, like ech hello instead of echo hello.
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