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Why do I get AttributeError: 'NoneType' object has no attribute 'something'?
...one and you're attempting to access an attribute of it called 'something'.
foo = None
foo.something = 1
or
foo = None
print(foo.something)
Both will yield an AttributeError: 'NoneType'
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imp...
how to specify local modules as npm package dependencies
.... For example:
{
"name": "baz",
"dependencies": {
"bar": "file:../foo/bar"
}
}
Any of the following paths are also valid:
../foo/bar
~/foo/bar
./foo/bar
/foo/bar
syncing updates
Since npm install copies mymodule into node_modules, changes in mymodule's source will not automatic...
Spring Test & Security: How to mock authentication?
...edAuthority("ROLE_USER"),
new SimpleGrantedAuthority("PERM_FOO_READ")
));
User managerUser = new UserImpl("Manager User", "manager@company.com", "password");
UserActive managerActiveUser = new UserActive(managerUser, Arrays.asList(
new SimpleG...
All possible array initialization syntaxes
...ns that can be assigned with the var keyword can be passed as arguments.
Foo(new int[2])
Foo(new int[2] { 1, 2 })
Foo(new int[] { 1, 2 })
Foo(new[] { 1, 2 })
Foo({ 1, 2 }) is not compilable
Foo(new int[0])
Foo(new int[] { })
Foo({}) is not compilable
...
Access index of the parent ng-repeat from child ng-repeat
I want to use the index of the parent list (foos) as an argument to a function call in the child list (foos.bars).
6 Answer...
Why doesn't a python dict.update() return the object?
...y is that otherwise, you may get undesirable side effects. Consider
bar = foo.reverse()
If reverse (which reverses the list in-place) would also return the list, users may think that reverse returns a new list which gets assigned to bar, and never notice that foo also gets modified. By making rev...
Which regular expression operator means 'Don't' match this character?
...ch a, b, c or 0: [^a-c0]
The latter: match any three-letter string except foo and bar:
(?!foo|bar).{3}
or
.{3}(?<!foo|bar)
Also, a correction for you: *, ? and + do not actually match anything. They are repetition operators, and always follow a matching operator. Thus, a+ means match one or ...
Can you make just part of a regex case-insensitive?
...
@NonaUrbiz: Because the expression (?i)foobar is more readable than [Ff][Oo]{2}[Bb][Aa][Rr]
– Thanatos
Oct 25 '12 at 0:29
1
...
What is the “volatile” keyword used for?
...e visible to other processors.
Consider the following example:
something.foo = new Thing();
If foo is a member variable in a class, and other CPUs have access to the object instance referred to by something, they might see the value foo change before the memory writes in the Thing constructor ar...
Django: Get an object form the DB, or 'None' if nothing matches
...
There are two ways to do this;
try:
foo = Foo.objects.get(bar=baz)
except model.DoesNotExist:
foo = None
Or you can use a wrapper:
def get_or_none(model, *args, **kwargs):
try:
return model.objects.get(*args, **kwargs)
except model.DoesNo...