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How long does it take for GitHub page to show changes after changing index.html
...ew files. If you want to test it (or break a cache) you can append a query string like myfile.jpg?ver=123 and every time you update the string the cache will bust, and you can verify that the CDN is updating.
– Joel Glovier
Dec 19 '16 at 14:10
...
What exactly is Arel in Rails 3.0?
...eRecord
No, it isn't. It's a replacement for hand-crafting SQL queries in strings. It is a common query layer that underlies ActiveRecord, but it can also be used as an underpinning for DataMapper, for example.
If it is a replacement for anything, it's a replacement for Ambition. Or, you can think ...
Python != operation vs “is not”
... but are not identical. (They are not the same object in memory.)
Example: Strings
>>> greeting = "It's a beautiful day in the neighbourhood."
>>> a = unicode(greeting)
>>> b = unicode(greeting)
>>> a is b
False
>>> a == b
True
Note: I use unicode stri...
jQuery Ajax calls and the Html.AntiForgeryToken()
... it from the hidden input literal that the MVC Helper generates. The Magic string that is the header name is defined as a constant in the attribute class.
<script type="text/javascript">
$(document).ready(function () {
var isAbsoluteURI = new RegExp('^(?:[a-z]+:)?//', 'i');
...
How to import existing Git repository into another?
...e rm other
git branch -d ZZZ # to get rid of the extra branch before pushing
git push # if you have a remote, that is
I actually just tried this with a couple of my repos and it works. Unlike Jörg's answer it won't let you continue to u...
In Python, how do I determine if an object is iterable?
...
Checking for __iter__ works on sequence types, but it would fail on e.g. strings in Python 2. I would like to know the right answer too, until then, here is one possibility (which would work on strings, too):
from __future__ import print_function
try:
some_object_iterator = iter(some_object)...
Programmatically retrieve memory usage on iPhone
... 1048576));
} else {
NSLog(@"Error with task_info(): %s", mach_error_string(kerr));
}
}
There is also a field in the structure info.virtual_size which will give you the number of bytes available virtual memory (or memory allocated to your application as potential virtual memory in any even...
How to pretty print nested dictionaries?
...he only thing I can say against it is that it don't produce a valid python string, but can almost be converted back in python.
– y.petremann
Oct 6 '14 at 4:49
1
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How do I provide custom cast support for my class?
...c# but note that from that example, using the explicit method, if you do:
string name = "Test";
Role role = (Role) name;
Then everything is fine; however, if you use:
object name = "Test";
Role role = (Role) name;
You will now get an InvalidCastException because string cannot be cast to Role, ...
RegEx for Javascript to allow only alphanumeric
...ex that only allows alphanumeric. So far, everyone I try only works if the string is alphanumeric, meaning contains both a letter and a number. I just want one what would allow either and not require both.
...