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How to delete duplicate lines in a file without sorting it in Unix?
...rtant caveat here: if you need to do this for multiple files, and you tack more files on the end of the command, or use a wildcard… the 'seen' array will fill up with duplicate lines from ALL the files. If you instead want to treat each file independently, you'll need to do something like for f in...
Nginx not picking up site in sites-enabled?
... May be a problem with an incorrect path in the relative link more than it being a relative link at all. For example, if your link doesn't start with ../ to traverse up one directory, then enter sites-available. If you can cat the symlink and get output, Nginx should read it also as @Ha...
What is the purpose of AsQueryable()?
...ock a queryable data source using an in-memory data source so that you can more easily test methods that will eventually be used on a non-enumerable based IQueryable.
You can write helper methods for manipulating collections that can apply to either in-memory sequences or external data sources. If ...
How to pass parameters correctly?
...e, move if rvalue
// Working on copyOfObj...
}
You may want to learn more about this design by watching this talk by Scott Meyers (just mind the fact that the term "Universal References" that he is using is non-standard).
One thing to keep in mind is that std::forward will usually end up in a...
Algorithm to implement a word cloud like Wordle
...boxes, and a quadtree spatial index (all of which are things you can learn more about with some diligent googling).
Edit: As Reto Aebersold pointed out, there's now a book chapter, freely available, that covers this same territory: Beautiful Visualization, Chapter 3: Wordle
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[ :Unexpected operator in shell programming [duplicate]
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Why JSF saves the state of UI components on server?
...0 input fields (each with a label and message) and 2 buttons would take no more than 1KB. With 15 views in session, that should be no more than 15KB per session. With ~1000 concurrent user sessions, that should be no more than 15MB.
Your concern should be more focused on the real objects (managed be...
How to get the difference between two arrays of objects in JavaScript
...o lists by applying the predicate appropriately. (Extra points if it were more efficient than having to run through all m * n comparisons twice!)
– Scott Sauyet
Feb 24 '14 at 12:55
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Activity restart on rotation Android
...d and used only as a last-resort. Please read Handling Runtime Changes for more information about how to properly handle a restart due to a configuration change. In lieu, to persist data across rotation events, they seem to prefer using the onSaveInstanceState Bundle; or as @Jon-O mentions, onRetai...
How to do 3 table JOIN in UPDATE query?
...DATE table A JOIN table B ON {join data} JOIN table C ON {join data} JOIN {more join tables} SET A.column = {expression} (forgive me if this blasted editor won't let me enter newlines without doing a full post)
– UncaAlby
May 31 '17 at 17:07
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