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Determine if ActiveRecord Object is New
How can I check if an ActiveRecord object is new or is already persisted?
2 Answers
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Precedence and bitmask operations
I've come across a (seemingly) very strange case.
1 Answer
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How to call Makefile from another Makefile?
I'm getting some unexpected results calling one makefile from another. I have two makefiles, one called /path/to/project/makefile and one called /path/to/project/gtest-1.4.0/make/Makefile . I'm attempting to have the former call the latter. In /path/to/project/makefile, I have
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ruby convert array into function arguments
Say I have an array. I wish to pass the array to a function. The function, however, expects two arguments. Is there a way to on the fly convert the array into 2 arguments?
For example:
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How do I get and set Environment variables in C#?
How can I get Environnment variables and if something is missing, set the value?
6 Answers
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Template function inside template class
I have this code:
1 Answer
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Count occurrences of a char in plain text file
Is there any way under linux/terminal to count, how many times the char f occurs in a plain text file?
5 Answers
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Can you avoid Gson converting “” into unicode escape sequences?
I noticed that Gson converts the string "
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How to loop through a HashMap in JSP?
How can I loop through a HashMap in JSP?
3 Answers
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What is the difference between '&' and ',' in Java generics?
While reading the Java official tutorial about generics, I found that you can restrict the type argument (in this case is T ) to extend a class and/or more interfaces with the 'and' operator ( & ) like this:
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