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What is meant by 'first class object'?
...ming
language is said to support
first-class functions (or function
literal) if it treats functions as
first-class objects. Specifically,
this means that the language supports
constructing new functions during the
execution of a program, storing them
in data structures, passing them ...
get NSDate today, yesterday, this Week, last Week, this Month, last Month… variables
...nth, last Month variables ready for comparison for headers to be added on UITableView's titleForHeaderInSection
12 Answers
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PostgreSQL “DESCRIBE TABLE”
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edited Feb 26 '15 at 11:55
IMSoP
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How to show the loading indicator in the top status bar
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It's in UIApplication:
For Objective C:
Start:
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
End:
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
For swift :
Start
...
Rails: select unique values from a column
...+
Model.distinct.pluck(:rating)
Update
Apparently, as of rails 5.0.0.1, it works only on "top level" queries, like above. Doesn't work on collection proxies ("has_many" relations, for example).
Address.distinct.pluck(:city) # => ['Moscow']
user.addresses.distinct.pluck(:city) # => ['Moscow...
Printing the last column of a line in a file
I have a file that is constantly being written to/updated. I want to find the last line containing a particular word, then print the last column of that line.
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How to view method information in Android Studio?
...n Eclipse, when you hover your mouse over a method, a window would appear with a description of what the method does, what the parameters mean and what it returns. Is there a way to get Android Studio to do the same thing?
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Simple tool to 'accept theirs' or 'accept mine' on a whole file using git
...between HEAD (mine) and the imported change (theirs). Most of the time I either want all of their changes or all of mine. Commonly this is because my change made it upsteam and is coming back to me through a pull, but may be slightly modified in various places.
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Different results with Java's digest versus external utilities
I have written a simple Java class to generate the hash values of the Windows Calculator file. I am using Windows 7 Professional with SP1 . I have tried Java 6.0.29 and Java 7.0.03 . Can someone tell me why I am getting different hash values from Java versus (many!) external utilities and/or ...
JavaScript replace/regex
...STONE $TESTONE".replace( new RegExp("\\$TESTONE","gm"),"foo")
Otherwise, it looks for the end of the line and 'TESTONE' (which it never finds).
Personally, I'm not a big fan of building regexp's using strings for this reason. The level of escaping that's needed could lead you to drink. I'm sure...