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Postgres: How to do Composite keys?

I cannot understand the syntax error in creating a composite key. It may be a logic error, because I have tested many varieties. ...
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What is the second parameter of NSLocalizedString()?

... The comment string is ignored by the application. It is used for a translator's benefit, to add meaning to the contextual usage of the key where it is found in your application. For example, the Hello_World_Key key may take different values in a gi...
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How to create a new file together with missing parent directories?

... This only works if the file was created with a path string which contains a parent directory, i.e. new File("file.txt").getParentFile() returns null, new File("dir/file.txt").getParentFile() returns the same as new File("dir") ...
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Remove an Existing File from a Git Repo

...stop tracking my local development log (log/development.log) in our repositories. Is this possible and how can I do it? 3 ...
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How was the first compiler written?

...byte values of machine code that can be directly interpreted by the processor. It is quite possible to write a program in opcodes directly by looking them up from a table (such as this one for the 6039 microprocessor, for example) that lists them with the matching assembly instructions, and hand-det...
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C# Sortable collection which allows duplicate keys

...ing a program to set a sequence in which various objects will appear in report. The sequence is the Y position (cell) on Excel spreadsheet. ...
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Call to getLayoutInflater() in places not in activity

What does need to be imported or how can I call the Layout inflater in places other than activity? 6 Answers ...
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Git: Ignore tracked files

I have some tracked files in a repository which are automatically modified when building the code. I don't want to untrack them, I just don't want them to appear as modified and I don't want them to be staged when I git add. ...
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Accessing localhost (xampp) from another computer over LAN network - how to?

I have just set up a wi-fi network at home. I have all my files on my desktop computer (192.168.1.56) and want to access localhost over there from another computer (192.168.1.2). ...
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switch() statement usage

...erally faster than if statements. So that, and the fact that the code is shorter/neater with a switch statement leans in favor of switch: # Simplified to only measure the overhead of switch vs if test1 <- function(type) { switch(type, mean = 1, median = 2, trimmed = 3) ...