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Random “Element is no longer attached to the DOM” StaleElementReferenceException
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Am I right in saying that it's no longer possible to read elements into variables and re-use them? Because I have a huge dry and dynamic WATiR DSL that relies on passing elements and I'm trying to port to webdriver, but I'm having the same problem. Essentially I'll have to add ...
How to write to a file, using the logging Python module?
...g.DEBUG)
logger.addHandler(fh)
And you're good to go.
P.S. Make sure to read the logging HOWTO as well.
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Can I change multiplier property for NSLayoutConstraint?
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The multiplier property is read only. You have to remove the old NSLayoutConstraint and replace it with a new one to modify it.
However, since you know you want to change the multiplier, you can just change the constant by multiplying it yourself whe...
ggplot with 2 y axes on each side and different scales
...uely map it back to a point in the data space.
They are relatively hard to read correctly compared to other options. See A Study on Dual-Scale Data Charts by Petra Isenberg, Anastasia Bezerianos, Pierre Dragicevic, and Jean-Daniel Fekete for details.
They are easily manipulated to mislead: there is ...
Pushing an existing Git repository to SVN
... your machine.
Open .git/config and add the following (from Maintaining a read-only SVN mirror of a Git repository):
[svn-remote "svn"]
url = https://your.svn.repo
fetch = :refs/remotes/git-svn
Now, from a console window, type these:
git svn fetch svn
git checkout -b svn git-svn
git mer...
Android, ListView IllegalStateException: “The content of the adapter has changed but ListView did no
What I want to do : run a background thread which calculates ListView contents and update ListView partially, while results are calculated.
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“Debug only” code that should run only when “turned on”
...make it static to persist the same value for the life of the program (or thread depending on your static memory model), or make it an ordinary instance var to control it over the life of an object instance. If that instance is a singleton, they'll behave the same way.
#if DEBUG
private /*static*/ b...
What is a PDB file?
...stion "Do I need a PDB file deployed to my customer's machine?", and after reading this post, decided to exclude the file.
Everything worked fine, until today, when I was trying to figure out why a message box containing an Exception.StackTrace was missing the file and line number information - ne...
Null coalescing in powershell
...ht also consider wrapping it in a very simple function to make things more readable:
function Coalesce($a, $b) { if ($a -ne $null) { $a } else { $b } }
$s = Coalesce $myval "new value"
or possibly as, IfNull:
function IfNull($a, $b, $c) { if ($a -eq $null) { $b } else { $c } }
$s = IfNull $myv...
What are some (concrete) use-cases for metaclasses?
...ecently, and came up with several answers. I hope it's OK to revive this thread, as I wanted to elaborate on a few of the use cases mentioned, and add a few new ones.
Most metaclasses I've seen do one of two things:
Registration (adding a class to a data structure):
models = {}
class ModelMetac...