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Cast List to List
...uit.Add(new Banana());
// Eek - it's a banana!
Apple apple = apples[0];
Now you can convert a List<Apple> to an IEnumerable<IFruit> in .NET 4 / C# 4 due to covariance, but if you want a List<IFruit> you'd have to create a new list. For example:
// In .NET 4, using the covarianc...
filter items in a python dictionary where keys contain a specific string
I'm a C coder developing something in python. I know how to do the following in C (and hence in C-like logic applied to python), but I'm wondering what the 'Python' way of doing it is.
...
How to get my IP address programmatically on iOS/macOS?
...ay 16, 2014 (bug pointed out by lhunath, see comments). Loopback addresses now returned, but its easy for you to uncomment the test to exclude them yourself.
EDIT2: (by some unknown person): Improved further March 13, 2015: In case the user uses a VPN (regardless over WiFi or Cellular), the previou...
How to set warning level in CMake?
... add this feature". It doesn't say, that you did some cursory research and now hope for someone else to do the heavy lifting for you. If you don't want to be attributed with the implementation (and questions on its progress), you need to edit your answer and disassociate yourself from the task you h...
Error handling in Bash
...
set -e -o pipefail -u # and know what you are doing
– Sam Watkins
Jul 3 '14 at 8:32
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Is it possible to reopen a closed branch in Mercurial?
...
try with following:
hg pull && hg update branch_name
Now make a small change to one of the file and then commit it
hg commit -m "minor change"
then push it
hg push -b .
Now you should be able to work normally.
...
How to Correctly handle Weak Self in Swift Blocks with Arguments
...e closure use [weak self].
If self will never be nil in the closure use [unowned self].
If it's crashing when you use [unowned self] I would guess that self is nil at some point in that closure, which is why you had to go with [weak self] instead.
I really liked the whole section from the manual...
UnicodeDecodeError when redirecting to file
...character list is included in the Unicode standard; it covers most of the known characters.
On the other hand, computers do need to represent abstract characters in some way: for this, they use arrays of bytes (numbers between 0 and 255 included), because their memory comes in byte chunks. The nece...
How do I create and read a value from cookie?
...name, value, days = 7, path = '/') => {
const expires = new Date(Date.now() + days * 864e5).toUTCString()
document.cookie = name + '=' + encodeURIComponent(value) + '; expires=' + expires + '; path=' + path
}
const getCookie = (name) => {
return document.cookie.split('; ').reduce((r, v)...
Is there a builtin identity function in python?
... added advantages/drawbacks of the two in order not to mislead anyone. And now, I really believe there should have been a builtin function that accepts any number of parameters and is a true identity :)
– rds
Jan 5 '12 at 19:14
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