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How to get a variable name as a string in PHP?
...ad. So the identity comparison yields true for equals scalar values ($a = 'foo'; $b = 'foo'; assert($a === $b);)?
– Argelbargel
Nov 1 '08 at 0:46
...
Delete all local changesets and revert to tree
... of those.
If the target revision is called good and your clone is called foo, then do:
hg clone -r good foo foo-clean
This will be a fast, local operation -- there is no reason to download everything again. The foo-clean clone will only contain changesets up to revision good. You can now replac...
How do I rename all folders and files to lowercase on Linux?
...meone explain to my why this should work in the first place? If it finds ./FOO and ./FOO/BAR, it first renames ./FOO to ./foo, after which it can no longer find ./FOO/BAR. Entering my own answer below that should fix this.
– oisyn
Feb 14 '19 at 15:54
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SQL standard to escape column names?
...
According to SQLite,
'foo' is an SQL string
"foo" is an SQL identifier (column/table/etc)
[foo] is an identifier in MS SQL
`foo` is an identifier in MySQL
For qualified names, the syntax is: "t"."foo" or [t].[foo], etc.
MySQL supports the stand...
Include constant in string without concatenating
...
Yes it is (in some way ;) ):
define('FOO', 'bar');
$test_string = sprintf('This is a %s test string', FOO);
This is probably not what you were aiming for, but I think, technically this is not concatenation but a substitution and from this assumption, it inclu...
Why is there a `null` value in JavaScript?
...d can't tell you whether the variable/property exists or not.
console.log(foo); // "ReferenceError: foo is not defined"
// foo does not exist
var foo;
console.log(foo); // "undefined", a different response
console.log(foo === undefined); /...
Find a private field with Reflection?
...
You can do it just like with a property:
FieldInfo fi = typeof(Foo).GetField("_bar", BindingFlags.NonPublic | BindingFlags.Instance);
if (fi.GetCustomAttributes(typeof(SomeAttribute)) != null)
...
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Is it possible to make abstract classes in Python?
...mport ABC, abstractmethod
class Abstract(ABC):
@abstractmethod
def foo(self):
pass
# Python 3.0+
from abc import ABCMeta, abstractmethod
class Abstract(metaclass=ABCMeta):
@abstractmethod
def foo(self):
pass
# Python 2
from abc import ABCMeta, abstractmethod
c...
Why doesn't c++ have &&= or ||= for booleans?
... can happen &&= and ||= were used as syntactic sugar for bool foo = foo && bar and bool foo = foo || bar ?
...
JavaScript private methods
...se_restroom is visible to all
private_stuff();
}
this.buy_food = function() { // buy_food is visible to all
private_stuff();
}
}
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