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super() fails with error: TypeError “argument 1 must be type, not classobj” when parent does not inh
...oblem is that class B is not declared as a "new-style" class. Change it like so:
class B(object):
and it will work.
super() and all subclass/superclass stuff only works with new-style classes. I recommend you get in the habit of always typing that (object) on any class definition to make sure ...
Add a new element to an array without specifying the index in Bash
Is there a way to do something like PHPs $array[] = 'foo'; in bash vs doing:
5 Answers
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Grid of responsive squares
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You can make responsive grid of squares with verticaly and horizontaly centered content only with CSS. I will explain how in a step by step process but first here are 2 demos of what you can achieve :
Grid of square images
Grid of sq...
Does a valid XML file require an XML declaration?
...he input is encoded as UTF-8, UTF-16 or US-ASCII. Autodetection doesn't work when it encounters 8-bit encodings that use characters outside the US-ASCII range (e.g. ISO 8859-1) -- avoid creating these if you can.
The standalone indicates whether the XML document can be correctly processed without t...
Why can't the tag contain a tag inside it?
As far as I know, this is right:
5 Answers
5
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Find the IP address of the client in an SSH session
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Check if there is an environment variable called:
$SSH_CLIENT
OR
$SSH_CONNECTION
(or any other environment variables) which gets set when the user logs in. Then process it using the user login script.
Extract the IP:
$ e...
Convert decimal to hexadecimal in UNIX shell script
...o convert decimal numbers into hexadecimal? I thought od would do the trick, but it's not realizing I'm feeding it ASCII representations of numbers.
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Can't ignore UserInterfaceState.xcuserstate
...sion control. I've explicitly added ProjectFolder.xcodeproj/project.xcworkspace/xcuserdata/myUserName.xcuserdatad/UserInterfaceState.xcuserstate to .gitignore , but Git it won't ignore it. Any ideas why this is so?
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How to check if current thread is not main thread
I need to check if the thread running a certain piece of code is the main (UI) thread or not. How can I achieve this?
9 Ans...
What is the difference between the OAuth Authorization Code and Implicit workflows? When to use each
OAuth 2.0 has multiple workflows. I have a few questions regarding the two.
9 Answers
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