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Check if a value is within a range of numbers
... answered Apr 9 '18 at 2:51
AlexanderAlexander
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What is the difference between ? and Object in Java generics?
...Eclipse seems to be giving me an option to choose between a type of Object and a type of '?'.
6 Answers
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Left-pad printf with spaces
...nt exactly 40 spaces then some text, just save the 40 spaces in a constant and print them. If you need to print multiple lines, either use multiple printf statements like the one above, or do it in a loop, changing the value of ptr each time.
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How to prevent multiple instances of an Activity when it is launched with different Intents
... using the "Open" button on the Google Play Store app (previously called Android Market). It seems that launching it from the Play Store uses a different Intent than launching it from the phone's application menu of icons. This is leading to multiple copies of the same Activity being launched, w...
How to quit a java app from within the program
...lso, as others have mentioned, clean up first! That involves closing files and other open resources.
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Facebook database design?
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Keep a friend table that holds the UserID and then the UserID of the friend (we will call it FriendID). Both columns would be foreign keys back to the Users table.
Somewhat useful example:
Table Name: User
Columns:
UserID PK
EmailAddress
Password
Ge...
Assign one struct to another in C
...re an issue than it is for assignment of the built in types, like integers and doubles - assignment is not an atomic operation for these either.
– anon
Feb 20 '10 at 13:58
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How to inspect the return value of a function in GDB?
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I imagine there are better ways to do it, but the finish command executes until the current stack frame is popped off and prints the return value -- given the program
int fun() {
return 42;
}
int main( int argc, char *v[] ) {
fun();
return 0;
}
You can debug it as such ...
Best way of invoking getter by reflection
...will always have a getter method. I know that I can use setAccesible(true) and get its value (when there is no PermissionManager), though I prefer to invoke its getter method.
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Find intersection of two nested lists?
...(set.intersection, it, set(next(it, []))). Both version doesn't require to convert all input lists to set. The latter is more memory efficient.
– jfs
Dec 5 '12 at 6:41
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