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How to go back (ctrl+z) in vi/vim
In normal text editors [with all due respect to Vim] there is a shortcut Ctrl + Z when you have done something nasty and want to return to the previous version of the text. Like BACK button in Word. I wonder how can you achieve this behaviour in Vim.
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Undo scaffolding in Rails
...an destroy/undo it using
rails destroy scaffold MyFoo
That will delete all the files created by generate, but not any additional changes you may have made manually.
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How do you change text to bold in Android?
...droid:textStyle
Examples:
android:textStyle="bold|italic"
Programmatically the method is:
setTypeface(Typeface tf)
Sets the typeface and style in which the text should be displayed. Note that not all Typeface families actually have bold and italic variants, so you may need to use setTypeface...
What would cause an algorithm to have O(log log n) complexity?
... n) terms can show up in a variety of different places, but there are typically two main routes that will arrive at this runtime.
Shrinking by a Square Root
As mentioned in the answer to the linked question, a common way for an algorithm to have time complexity O(log n) is for that algorithm to work...
How can I check if a key exists in a dictionary? [duplicate]
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if key in array:
# do something
Associative arrays are called dictionaries in Python and you can learn more about them in the stdtypes documentation.
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Shared-memory objects in multiprocessing
... some other parameters). func with different parameters can be run in parallel. For example:
4 Answers
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npm not working after clearing cache
... not work for me on Windows 10 (no errors, just did nothing). I had to manually delete all the folders within %appdata%\npm-cache
– plasmid87
Dec 7 '17 at 16:18
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NSString with \n or line break
...instance of NSString named myString read in from my .plist file, I had to call...
myString = [myString stringByReplacingOccurrencesOfString:@"\\n" withString:@"\n"];
... before assigning it to my UILabel instance...
myLabel.text = myString;
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How can I select the first day of a month in SQL?
...dOfMonth will give you the last day of the month.
– hallizh
Nov 3 '15 at 13:47
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How can I determ...
Setting Corner Radius on UIImageView not working
... (view.layer.shouldRasterize = YES), every frame will require a re-mask of all the pixels.
– jjxtra
Aug 12 '13 at 13:41
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