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What is the meaning and difference between subject, user and principal?
...ntext of security frameworks, a few terms commonly occur subject , user and principal , of which I have not been able to find a clear definition and the difference between them.
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Why use the params keyword?
...ly doing to make the best choice.
– Allen Clark Copeland Jr
Nov 28 '15 at 22:15
2
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Can I pass parameters by reference in Java?
...itself which is passed by value, hence it appears to be pass-by-reference (and people often claim that it is). This is not the case, as shown by the following:
Object o = "Hello";
mutate(o)
System.out.println(o);
private void mutate(Object o) { o = "Goodbye"; } //NOT THE SAME o!
Will print Hello...
How to add to an existing hash in Ruby
...ash in Ruby, I'm in the process of working through Apress' Beginning Ruby and have just finished the hashes chapter.
7 Ans...
How to convert C# nullable int to int
...In some future framework version, default may also become overloadable; if and when that happens, code using default will be easily able to take advantage, while explicit null or zero assignments will have to be changed.
– KeithS
Mar 23 '15 at 14:35
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Remove everything after a certain character
...hoose everything up to that character? I'm getting the value from an href and up to the "?", and it's always going to be a different amount of characters.
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Simultaneously merge multiple data.frames in a list
... issue here is that each data.frame differs in terms of the number of rows and columns, but they all share the key variables (which I've called "var1" and "var2" in the code below). If the data.frames were identical in terms of columns, I could merely rbind , for which plyr's rbind.fill would...
Access props inside quotes in React JSX
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this is something that's hard to find. and for reusable containers this is a-must-know
– holms
Dec 23 '16 at 16:49
2
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What is the source code of the “this” module doing?
If you open a Python interpreter, and type "import this", as you know, it prints:
5 Answers
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Get last field using awk substr
...fectly. I didnt think about $NF variable. Thanks for your immediate simple and effective answer.
– Mari
Jul 29 '13 at 10:27
6
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