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Swift: Testing optionals for nil
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does not conform to protocol 'BooleanType.Protocol'
You have to use one of these forms:
if xyz != nil {
// Do something using `xyz`.
}
if let xy = xyz {
// Do something using `xy`.
}
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How do you assert that a certain exception is thrown in JUnit 4 tests?
...pect an exception only somewhere in your code, and not a blanket like this one.
– Oh Chin Boon
Jun 27 '11 at 14:50
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Explain ExtJS 4 event handling
... default.
For widgets there are two ways of assigning handlers. The first one - is to use on method (or addListener). Let's for example create Button widget and assign click event to it. First of all you should check event's docs for handler's arguments:
click( Ext.button.Button this, Event e, ...
Check if list contains any of another list
...Why O(n^2)? Isn't it O(n*m) as we are talking abount two variables and not one? Since m (the parametes) are a constant, it's the same as O(n). I don't see how intersect should be much faster here? But agreed, Intersect has the potential to be faster, but is not guaranteed.
– Sq...
How do you copy and paste into Git Bash
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@AntiGameZ undo can be done with Ctrl-_. I believe this is all from readline utility, which emulates Emacs, the One True Editor.
– Brady Trainor
Feb 11 '14 at 1:35
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Git rebase: conflicts keep blocking progress
...I want to get into v4. So, in v4, I tried to do a rebase from master, and one file keeps screwing things up: a one-line text file, that contains the version number. This file is app/views/common/version.txt , which before rebasing contains this text:
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Log to the base 2 in python
... @wap26: Above, I'm using the IPython interactive interpreter. One of its features (accessed with the ?) is dynamic object introspection.
– unutbu
Apr 30 '13 at 17:51
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Overwrite or override
... issue. Couldn't find a similar question here so I decided to create a new one.
5 Answers
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How to move a file?
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Am I the only one that thinks os.rename is not working for directories? I quote: "If dst is a directory, OSError will be raised."
– Fabian
Jun 23 '14 at 20:11
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Number of visitors on a specific page
...e continually changing options and their places. Without any common sense. One day one option is under one segment, next day it's under another.
– Luka
Nov 20 '17 at 19:18
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