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Question mark (?) in XML attributes for Android
Can anyone explain the question mark means in Android XML attributes?
2 Answers
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Use cases for the 'setdefault' dict method
...ld say defaultdict is useful for settings defaults before filling the dict and setdefault is useful for setting defaults while or after filling the dict.
Probably the most common use case: Grouping items (in unsorted data, else use itertools.groupby)
# really verbose
new = {}
for (key, value) in ...
Removing path and extension from filename in powershell
... to files. I'd like to save just the filename, without the file extension and the leading path. So from this:
12 Answers
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Android WebView: handling orientation changes
...ation newConfig){
super.onConfigurationChanged(newConfig);
}
And set the android:configChanges attribute in the manifest:
<activity android:name="..."
android:label="@string/appName"
android:configChanges="orientation|screenSize"
for more info see:
http://deve...
Rails new vs create
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Within Rails' implementation of REST new and create are treated differently.
An HTTP GET to /resources/new is intended to render a form suitable for creating a new resource, which it does by calling the new action within the controller, which creates a new unsaved...
Evaluating string “3*(4+2)” yield int 18 [duplicate]
...NET framework that can evaluate a numeric expression contained in a string and return the result? F.e.:
14 Answers
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How to print a dictionary line by line in Python?
...came to the conclusion of my previous comment. You could send me your code and I can see if I'm any help.
– Darrel Holt
Dec 21 '16 at 20:54
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What Xcode keyboard shortcuts do you use regularly? [closed]
...er then navigate to source files. However now I find the open quickly command better (cmd-shift-O , type a few chars, return)
– Robert
Nov 30 '12 at 12:45
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List of Big-O for PHP functions
...ght it'd be good idea to have it for reference somewhere. I've gone though and either via benchmark or code-skimming to characterize the array_* functions. I've tried to put the more interesting Big-O near the top. This list is not complete.
Note: All the Big-O where calculated assuming a hash look...
How to reuse an ostringstream?
I'd like to clear out and reuse an ostringstream (and the underlying buffer) so that my app doesn't have to do as many allocations. How do I reset the object to its initial state?
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