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How to properly use unit-testing's assertRaises() with NoneType objects? [duplicate]
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The problem is the TypeError gets raised 'before' assertRaises gets called since the arguments to assertRaises need to be evaluated before the method can be called. You need to pass a lambda expression like:
self.assertRaises(TypeError, lambda: self.testListNone[:1])
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Targeting only Firefox with CSS
...s as of Firefox 59, released March 2018: bugzilla.mozilla.org/show_bug.cgi?id=1035091
– Jordan Gray
Dec 17 '19 at 17:16
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Why do you need to invoke an anonymous function on the same line?
...nition. Because it has no name (it's anonymous duh!), you won't be able to call it anymore. If you don't put semicolon then function could still be executed.
– SolutionYogi
Jul 16 '09 at 20:32
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How to detect the end of loading of UITableView
...here for smoother UI (single cell usually displays fast after willDisplay: call). You could also try it with tableView:didEndDisplayingCell:.
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Will console.log reduce JavaScript execution performance?
...also causes a performance hit. This came to my attention as I was logging "called" within a function that got invoked on hundreds of React components during re-renders. The mere presence of the logging code caused very noticeable stutter during frequent updates.
– Lev
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Recover from git reset --hard?
...ged changes (git add) should be recoverable from index objects, so if you did, use git fsck --lost-found to locate the objects related to it. (This writes the objects to the .git/lost-found/ directory; from there you can use git show <filename> to see the contents of each file.)
If not, the a...
Is there YAML syntax for sharing part of a list or map?
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spoon: b
knife: c
cup: 1
mug: 2
glass: 3
More formally, after calling the YAML parser to get native objects from a config file, but before passing the objects to the rest of the application, my application will walk the object graph looking for mappings containing the single key MERGE. ...
Difference between method and function in Scala
...ote that, on the JVM, these (method values) are implemented with what Java calls "methods".
A Function Declaration is a def declaration, including type and body. The type part is the Method Type, and the body is an expression or a block. This is also implemented on the JVM with what Java calls "me...
Run a Python script from another Python script, passing in arguments [duplicate]
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@macdonjo: No, the os.system() call waits until the thing you called finishes before continuing. You could use subprocess.Popen() and manage the new processes yourself, or use the multiprocessing module, or various other solutions.
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Rails: How does the respond_to block work?
....html
The Responder does NOT contain a method for .html or .json, but we call these methods anyways! This part threw me for a loop.
Ruby has a feature called method_missing. If you call a method that doesn't exist (like json or html), Ruby calls the method_missing method instead.
http://ruby-met...