This question already has answers here: Closed 10 years ago. Possible Duplicate: Collection was modified; enumeration operation may not execute
i have question about how to count matched 开发者_开发百科elements in ArrayList in java.. Ex: My ArrayList contain [sport, sport, ball , player, sport]
Enumerating over Map#entrySet doesn\'t work as expected for all Map implementations, specially for EnumMap, IdentityHashMap and here is the sample code from Josh Bloch\'s puzzler presentation (Puzzle
Suppose I have two classes CLassA and CLassB. And they have one atributte in common, for example the number of elements that each class holds.
In Scala, you can do val l = List(1, 2, 3) l.filter(_ > 2)// returns a List[Int] val s = Set(\"hello\", \"world\")
I am trying to input a file into my program. The input is a file piped to \"standard in\". Here is an example input:
Is there any utility method to convert a list of Numerical types to array of primitive type? In other words I am looking for a better solution than开发者_运维技巧 this.
I want to extract all items of an IEnumerable sequence whose Key-Value is equal to one of the Key-Values in another IEnumerable sequence.
Is it possible to run code aftter or before the item was added to collection? Lets say i have object Product with property Price and Warehouse object with properties IList Products and TotalPrice. I
I was talking with a person about using() statement. He said if we do NOT use using() statement for something like a StreamWriter, if any exception happens, the resource will NEVER get collected.
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