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What regular expression will match valid international phone numbers?
...e whether a phone number is valid before attempting to dial it. The phone call can go anywhere in the world.
23 Answers
...
What is the optimal Jewish toenail cutting algorithm?
I am working on the software for a machine that will automatically trim toenails, so that users can simply put their feet in it and run it instead of having to manually do it by biting them or using nail clippers.
...
Why isn't String.Empty a constant?
...ing.cs.
The Empty constant holds the empty
string value. We need to call the
String constructor so that the
compiler doesn't mark this as a
literal.
Marking this as a literal would mean
that it doesn't show up as a field
which we can access from native.
I found this informati...
Why does (0 < 5 < 3) return true?
...d while I was editing my question to add the if(0 < 5 < 1) == false. All is clear now, thanks :)
– punkrockbuddyholly
Nov 3 '10 at 16:39
...
Check if the number is integer
...
does the tolerance-checking suggestion really work?? x <- 5-1e-8; x%%1 gives 0.9999999 (which would imply if tol==1e-5 for example) that x is not an integer.
– Ben Bolker
Jan 24 '14 at 15:34
...
moving changed files to another branch for check-in
... you have not made the commit yet, just run git stash. This will save away all of your changes.
Switch to the branch you want the changes on and run git stash pop.
There are lots of uses for git stash. This is certainly one of the more useful reasons.
An example:
# work on some code
git stash
gi...
When to use an object instance variable versus passing an argument to the method
...sus simply declaring them as object instance variables that are visible to all of the object's methods?
5 Answers
...
Transferring ownership of an iPhone app on the app store
...
Starting June 11, 2013 this has officially become possible.
Here's the official note:
Dear developer,
Apps can now be transferred from one developer to another within iTunes Connect, for example after an acquisition or when a distribution deal expires. Transf...
postgresql return 0 if returned value is null
...ns the first of its arguments that is not null.
Null is returned only if all arguments are null. It is often
used to substitute a default value for null values when data is
retrieved for display.
Edit
Here's an example of COALESCE with your query:
SELECT AVG( price )
FROM(
SELECT *, cum...
How do function pointers in C work?
...nPtr)(2, 3); // sum == 5
Passing the pointer to another function is basically the same:
int add2to3(int (*functionPtr)(int, int)) {
return (*functionPtr)(2, 3);
}
We can use function pointers in return values as well (try to keep up, it gets messy):
// this is a function called functionFac...