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What is the difference between `new Object()` and object literal notation?
...rly recognizable as to what is happening, so using new Object(), you are really just typing more and (in theory, if not optimized out by the JavaScript engine) doing an unnecessary function call.
These
person = new Object() /*You should put a semicolon here too.
It's not required, but it is goo...
Determine path of the executing script
I have a script called foo.R that includes another script other.R , which is in the same directory:
27 Answers
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@Resource vs @Autowired
... the annotation, perform injection by type. The difference is:
@Resource allows you to specify a name of the injected bean
@Autowired allows you to mark it as non-mandatory.
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Execute command on all files in a directory
...rovide the code to do the following:
Assume there is a directory of files, all of which need to be run through a program. The program outputs the results to standard out. I need a script that will go into a directory, execute the command on each file, and concat the output into one big output file.
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Why do this() and super() have to be the first statement in a constructor?
Java requires that if you call this() or super() in a constructor, it must be the first statement. Why?
19 Answers
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Is it not possible to stringify an Error using JSON.stringify?
...ying Error.prototype, while toJSON() may not be defined for Errors specifically, the method is still standardized for objects in general (ref: step 3). So, the risk of collisions or conflicts is minimal.
Though, to still avoid it completely, JSON.stringify()'s replacer parameter can be used instead...
How do the PHP equality (== double equals) and identity (=== triple equals) comparison operators dif
... such as !== or ===, then you can always be sure that the types won't magically change, because there will be no converting going on. So with strict comparison the type and value have to be the same, not only the value.
Type comparison table
As reference and example you can see the comparison tabl...
static function in C
... /* ok, f2 is in the same translation unit */
/* (basically same .c file) as f1 */
}
int f2(int foo) {
return 42 + foo;
}
main.c:
int f1(int); /* prototype */
int f2(int); /* prototype */
int main(void) {
f1(10); /* ok, f1 is visible to the linker */
f2(1...
Get generic type of class at runtime
...ned, it's only possible via reflection in certain circumstances.
If you really need the type, this is the usual (type-safe) workaround pattern:
public class GenericClass<T> {
private final Class<T> type;
public GenericClass(Class<T> type) {
this.type = type;...
Open popup and refresh parent page on close popup
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I didn't know window.opener, thanks! I always put the caller window in a variable in the contentWindow of the child. :-/
– kay
May 29 '12 at 2:36
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