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What's the safest way to iterate through the keys of a Perl hash?
If I have a Perl hash with a bunch of (key, value) pairs, what is the preferred method of iterating through all the keys? I have heard that using each may in some way have unintended side effects. So, is that true, and is one of the two following methods best, or is there a better way?
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What is the use case of noop [:] in bash?
I searched for noop in bash (:), but was not able to find any good information. What is the exact purpose or use case of this operator?
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Best way to alphanumeric check in JavaScript
What is the best way to perform an alphanumeric check on an INPUT field in JSP ? I have attached my current code
10 Answ...
How can a Java variable be different from itself?
I am wondering if this question can be solved in Java (I'm new to the language). This is the code:
10 Answers
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The Definitive C++ Book Guide and List
This question attempts to collect the few pearls among the dozens of bad C++ books that are published every year.
1 Answer
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How to get unique values in an array
How can I get a list of unique values in an array? Do I always have to use a second array or is there something similar to java's hashmap in JavaScript?
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Convert a timedelta to days, hours and minutes
I've got a timedelta. I want the days, hours and minutes from that - either as a tuple or a dictionary... I'm not fussed.
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Why can Java Collections not directly store Primitives types?
Java collections only store Objects, not primitive types; however we can store the wrapper classes.
7 Answers
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Switch on Enum in Java [duplicate]
Why can't you switch on an enum in Java? It seems simple enough to do and would make for some convenient code. Also this question could apply to String 's. You can switch on a char , but not a String ...?
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Will the Garbage Collector call IDisposable.Dispose for me?
The .NET IDisposable Pattern implies that if you write a finalizer, and implement IDisposable, that your finalizer needs to explicitly call Dispose.
This is logical, and is what I've always done in the rare situations where a finalizer is warranted.
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