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Iterate over the lines of a string
...=foo): return iter(foo.splitlines())
def f2(foo=foo):
retval = ''
for char in foo:
retval += char if not char == '\n' else ''
if char == '\n':
yield retval
retval = ''
if retval:
yield retval
def f3(foo=foo):
prevnl = -1
while Tru...
How to prevent IFRAME from redirecting top-level window
...
Try using the onbeforeunload property, which will let the user choose whether he wants to navigate away from the page.
Example: https://developer.mozilla.org/en-US/docs/Web/API/Window.onbeforeunload
In HTML5 you can use sandbox property. Ple...
How to get function parameter names/values dynamically?
...similar to an Array, but does not have any Array properties except length. For example, it does not have the pop method. However it can be converted to a real Array:
var args = Array.prototype.slice.call(arguments);
If Array generics are available, one can use the following instead:
var args = A...
What does the brk() system call do?
...libraries, pre-mmap) Unix the data segment was continuous with the heap; before program start, the kernel would load the "text" and "data" blocks into RAM starting at address zero (actually a little above address zero, so that the NULL pointer genuinely didn't point to anything) and set the break ad...
C# pattern to prevent an event handler hooked twice [duplicate]
...plement the event and check the invocation list. You'll also need to check for null:
using System.Linq; // Required for the .Contains call below:
...
private EventHandler foo;
public event EventHandler Foo
{
add
{
if (foo == null || !foo.GetInvocationList().Contains(value))
...
In Django, how does one filter a QuerySet with dynamic field lookups?
...nt expansion may be used to solve this problem:
kwargs = {
'{0}__{1}'.format('name', 'startswith'): 'A',
'{0}__{1}'.format('name', 'endswith'): 'Z'
}
Person.objects.filter(**kwargs)
This is a very common and useful Python idiom.
...
Calculating arithmetic mean (one type of average) in Python
...
See the question above: To avoid division by zero ( for [] )
– Simon Fakir
Jul 27 '17 at 11:05
6
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Extract file name from path, no matter what the os/path format
... extract filenames from paths, no matter what the operating system or path format could be?
17 Answers
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Is nested function a good approach when required by only one function? [closed]
...do_it at 0xb772b304>
>>> a()
4
Is this what you were looking for? It's called a closure.
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Curly braces in string in PHP
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This is the complex (curly) syntax for string interpolation. From the manual:
Complex (curly) syntax
This isn't called complex because the syntax is complex, but because
it allows for the use of complex expressions.
Any scalar variable, array e...