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Why do I get AttributeError: 'NoneType' object has no attribute 'something'?
...The sort() method of a list sorts the list in-place, that is, mylist is modified. But the actual return value of the method is None and not the list sorted. So you've just assigned None to mylist. If you next try to do, say, mylist.append(1) Python will give you this error.
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Purpose of memory alignment
...e byte fetches rather than one efficient word fetch, but many language specifiers decided it would be easier just to outlaw them and force everything to be aligned.
There is much more information in this link that the OP discovered.
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ASP.NET MVC 4 Custom Authorize Attribute with Permission Codes (without roles)
...
{
var isAuthorized = base.AuthorizeCore(httpContext);
if (!isAuthorized)
{
return false;
}
string privilegeLevels = string.Join("", GetUserRights(httpContext.User.Identity.Name.ToString())); // Call another method to get right...
How to replace local branch with remote branch entirely in Git?
...replace whichever branch your currently on with the contents of master. So if you're on e.g. a feature-branch, it will replace all its commits with master, so make sure you've checked out the branch you're replacing first.
– Zoltán
Jul 15 '16 at 8:29
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How do I implement basic “Long Polling”?
...how error handling in the coming Javascript example)
msgsrv.php
<?php
if(rand(1,3) == 1){
/* Fake an error */
header("HTTP/1.0 404 Not Found");
die();
}
/* Send a string after a random number of seconds (2-10) */
sleep(rand(2,10));
echo("Hi! Have a random number: " . rand(1,10));
?...
How do you make a deep copy of an object?
It's a bit difficult to implement a deep object copy function. What steps you take to ensure the original object and the cloned one share no reference?
...
How do I check for last loop iteration in Django template?
I have a basic question, in the Django template language how can you tell if you are at the last loop iteration in a for loop?
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Get the current URL with JavaScript?
...
-1: If you have a frame, image, or form with name="URL" then this property will be shadowed on the document object and your code will break. In that case, document.URL will refer to the DOM node instead. Better to use properties ...
Is it possible to declare a variable in Gradle usable in Java?
...me, thanks. Something that I have discovered is well is that you could specify alternate directories for the debug and release builds. In <project>/src/, if you create the file debug/res/values/strings.xml and another file release/res/values/strings.xml, you could set resources for the debug ...
How to initialize an array in one step using Ruby?
...o It:
plus_1 = 1.method(:+)
Array.new(3, &plus_1) # => [1, 2, 3]
If 1.method(:+) wasn't possible, you could also do
plus_1 = Proc.new {|n| n + 1}
Array.new(3, &plus_1) # => [1, 2, 3]
Sure, it's overkill in this scenario, but if plus_1 was a really long expression, you might want ...