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Is it good practice to NULL a pointer after deleting it?
...hat different) avoids crashes on double deletes.
Consider the following:
Foo* foo = 0; // Sets the pointer to 0 (C++ NULL)
delete foo; // Won't do anything
Whereas:
Foo* foo = new Foo();
delete foo; // Deletes the object
delete foo; // Undefined behavior
In other words, if you don't set dele...
Get elements by attribute when querySelectorAll is not available without using libraries?
...ns getElementsByTagName('*'), and returns only those elements with a "data-foo" attribute:
function getAllElementsWithAttribute(attribute)
{
var matchingElements = [];
var allElements = document.getElementsByTagName('*');
for (var i = 0, n = allElements.length; i < n; i++)
{
if (allE...
Proper way to declare custom exceptions in modern Python?
...tended for deprecation? Python 3.7 still seems to happily accept Exception(foo, bar, qux).
– mtraceur
Apr 20 '18 at 22:36
...
Simple Getter/Setter comments
...etter off without this kind of crap cluttering your code:
/**
* Sets the foo.
*
* @param foo the foo to set
*/
public void setFoo(float foo);
Very useful, if warranted:
/**
* Foo is the adjustment factor used in the Bar-calculation. It has a default
* value depending on the Baz type, but ...
How can you set class attributes from variable arguments (kwargs) in python
...
You can use the setattr() method:
class Foo:
def setAllWithKwArgs(self, **kwargs):
for key, value in kwargs.items():
setattr(self, key, value)
There is an analogous getattr() method for retrieving attributes.
...
What does pylint's “Too few public methods” message mean
...your class looks like this:
class MyClass(object):
def __init__(self, foo, bar):
self.foo = foo
self.bar = bar
Consider using a dictionary or a namedtuple instead. Although if a class seems like the best choice, use it. pylint doesn't always know what's best.
Do note that nam...
Can we omit parentheses when creating an object using the “new” operator?
...═══════════╝
From this table follows that:
new Foo() has higher precedence than new Foo
new Foo() has the same precedence as . operator
new Foo has one level lower precedence than the . operator
new Date().toString() works perfectly because it evaluates as (new Date())...
How to version REST URIs
...you'd never have more than one version in the URI.
– fool4jesus
Jan 8 '13 at 10:07
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What is the advantage of GCC's __builtin_expect in if else statements?
...mbly code that would be generated from:
if (__builtin_expect(x, 0)) {
foo();
...
} else {
bar();
...
}
I guess it should be something like:
cmp $x, 0
jne _foo
_bar:
call bar
...
jmp after_if
_foo:
call foo
...
after_if:
You can see that the instructions ar...
How do you share constants in NodeJS modules?
...
You can explicitly export it to the global scope with global.FOO = 5. Then you simply need to require the file, and not even save your return value.
But really, you shouldn't do that. Keeping things properly encapsulated is a good thing. You have the right idea already, so keep doing...