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Regular expression to allow spaces between words
...tl;dr
Just add a space in your character class.
^[a-zA-Z0-9_ ]*$
Now, if you want to be strict...
The above isn't exactly correct. Due to the fact that * means zero or more, it would match all of the following cases that one would not usually mean to match:
An empty string, "".
A string...
“is” operator behaves unexpectedly with integers
...
does anyone know how that range (-5, 256) was chosen? i wouldn't be too surprised if it were (0, 255) or even (-255, 255), but a range of 262 numbers starting at -5 seems surprisingly arbitrary.
– Woodrow Barlow
...
python: Change the scripts working directory to the script's own directory
... into whatever directory your Python script is located, even if you don't know what directory that will be when you're writing your script. To do this, you can use the os.path functions:
import os
abspath = os.path.abspath(__file__)
dname = os.path.dirname(abspath)
os.chdir(dname)
This takes th...
How can I generate a unique ID in Python? [duplicate]
...uction code (and about to roll out to more uses of it in a newer release). Now I'm scared!
– Matthew Schinckel
Nov 6 '10 at 7:38
2
...
How to elegantly ignore some return values of a MATLAB function?
...ction:
Func3 = @() deal(1,2,3);
[a,b,c]=Func3();
% yields a=1, b=2, c=3
Now the key here is that if you use an variable twice in the left hand side of a multiple-expression assignment, an earlier assignment is clobbered by the later assignment:
[b,b,c]=Func3();
% yields b=2, c=3
[c,c,c]=Func3()...
What's the difference between Spring Data's MongoTemplate and MongoRepository?
...<User> yourCustomMethod() {
// custom implementation here
}
}
Now let your base repository interface extend the custom one and the infrastructure will automatically use your custom implementation:
interface UserRepository extends CrudRepository<User, Long>, CustomUserRepository {...
How would I create a UIAlertView in Swift?
...nil))
self.presentViewController(alert, animated: true, completion: nil)
Now UIAlertController is a single class for creating and interacting with what we knew as UIAlertViews and UIActionSheets on iOS 8.
Edit: To handle actions:
alert.addAction(UIAlertAction(title: "OK", style: .Default, handle...
correct way to define class variables in Python [duplicate]
..._elem
999 456
>>> print c2.static_elem, c2.object_elem
999 456
# Now, let's try changing the object element
c1.object_elem = 888
>>> print c1.static_elem, c1.object_elem
999 888
>>> print c2.static_elem, c2.object_elem
999 456
As you can see, when we changed the class ...
What is Bit Masking?
...ou could first do the mask, then the shift. The results are the same, but now you would have to use a different mask:
uint32_t byte3 = (value & 0xff00) >> 8;
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Is this object-lifetime-extending-closure a C# compiler bug?
...ernal static void StaticMethod(double arg) { }
}
}
in cl: (Note !! now the this reference is gone !)
public hidebysig
instance void InstanceMethod () cil managed
{
// Method begins at RVA 0x2074
// Code size 56 (0x38)
.maxstack 4
.locals init (
...