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How to validate an Email in PHP?
...he filter_var() function, which gives you a lot of handy validation and sanitization options.
filter_var($email, FILTER_VALIDATE_EMAIL)
PHP Manual filter_var()
Available in PHP >= 5.2.0
If you don't want to change your code that relied on your function, just do:
function isValidEmail($emai...
Group by multiple columns in dplyr, using string vector input
... (documentation here). This lets you use the same functions you would use with select, like so:
data = data.frame(
asihckhdoydkhxiydfgfTgdsx = sample(LETTERS[1:3], 100, replace=TRUE),
a30mvxigxkghc5cdsvxvyv0ja = sample(LETTERS[1:3], 100, replace=TRUE),
value = rnorm(100)
)
# get the co...
Default template arguments for function templates
...
It makes sense to give default template arguments. For example you could create a sort function:
template<typename Iterator,
typename Comp = std::less<
typename std::iterator_traits<Iterator>...
Can I use git diff on untracked files?
Is it possible to ask git diff to include untracked files in its diff output, or is my best bet to use git add on the newly created files and the existing files I have edited, then use:
...
How to get all subsets of a set? (powerset)
...
The Python itertools page has exactly a powerset recipe for this:
from itertools import chain, combinations
def powerset(iterable):
"powerset([1,2,3]) --> () (1,) (2,) (3,) (1,2) (1,3) (2,3) (1,2,3)"
s = list(iterable)
...
jquery-ui sortable | How to get it work on iPad/touchdevices?
...
Found a solution (only tested with iPad until now!)!
http://touchpunch.furf.com/content.php?/sortable/default-functionality
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Writing Unicode text to a text file?
I'm pulling data out of a Google doc, processing it, and writing it to a file (that eventually I will paste into a Wordpress page).
...
What are the differences between -std=c++11 and -std=gnu++11?
... -std=gnu++11 as compilation parameter for gcc and clang? Same question with c99 and gnu99 ? I know about C++ and C standards, it's the differences in the parameters that interest me.
...
What does static_assert do, and what would you use it for?
...t; 2,
"Old versions of SomeLibrary are missing the foo functionality. Cannot proceed!");
class UsingSomeLibrary {
// ...
};
Assuming that SomeLibrary::Version is declared as a static const, rather than being #defined (as one would expect in a C++ library).
Contrast with having to a...
Example of multipart/form-data
I am wondering if anyone can share with me an example of multipart/form-data that contains:
2 Answers
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