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What's the difference between utf8_general_ci and utf8_unicode_ci?
...tation from early MySQL versions which remains only for backward compatibility. The fixed version was given the name utf8mb4.
Note: Newer versions of MySQL have updated Unicode sorting rules, available under names such as utf8mb4_0900_ai_ci for equivalent rules based on Unicode 9.0 - and with no equ...
Combining two expressions (Expression)
...e logical expressions, but the problem is the parameters; are you working with the same ParameterExpression in expr1 and expr2? If so, it is easier:
var body = Expression.AndAlso(expr1.Body, expr2.Body);
var lambda = Expression.Lambda<Func<T,bool>>(body, expr1.Parameters[0]);
This als...
jQuery find events handlers registered with an object
...follow
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edited Jan 10 '13 at 17:15
gnarf
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Reimport a module in python while interactive
I know it can be done, but I never remember how.
6 Answers
6
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Regular expression for letters, numbers and - _
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The pattern you want is something like (see it on rubular.com):
^[a-zA-Z0-9_.-]*$
Explanation:
^ is the beginning of the line anchor
$ is the end of the line anchor
[...] is a character class definition
* is "zero-or-more" repetition
Note that the literal dash -...
How to become an OpenCart guru? [closed]
It seems like they have no documentation except some api calls on their official forums. I have experience with Zend framework and CodeIgniter framework. Can any OpenCart masters recommend me the best way to learn it and master in shortest amount of time? I have to do a big project with it soon.
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How to terminate a Python script
I am aware of the die() command in PHP which exits a script early.
10 Answers
10
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How to replace plain URLs with links?
... idea. You must imagine this is a common enough problem that someone has written, debugged and tested a library for it, according to the RFCs. URIs are complex - check out the code for URL parsing in Node.js and the Wikipedia page on URI schemes.
There are a ton of edge cases when it comes to parsi...
What exactly does Perl's “bless” do?
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In general, bless associates an object with a class.
package MyClass;
my $object = { };
bless $object, "MyClass";
Now when you invoke a method on $object, Perl know which package to search for the method.
If the second argument is omitted, as in your example, t...
Programmatically Request Access to Contacts
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As per this documentation on apple's site (scroll down to Privacy in the middle of the page), access to the address book must be granted before it can be access programmatically. Here is what I ended up doing.
#import <AddressBookUI/AddressBookUI.h>
//...