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Java array reflection: isArray vs. instanceof
...es, you should use the instanceof operator to test whether an object is an array.
Generally, you test an object's type before downcasting to a particular type which is known at compile time. For example, perhaps you wrote some code that can work with a Integer[] or an int[]. You'd want to guard you...
Java: how to convert HashMap to array
I need to convert a HashMap<String, Object> to an array; could anyone show me how it's done?
12 Answers
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Is it possible to get all arguments of a function as single object inside that function?
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Use arguments. You can access it like an array. Use arguments.length for the number of arguments.
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How can I check whether an array is null / empty?
I have an int array which has no elements and I'm trying to check whether it's empty.
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How to assign string to bytes array
I want to assign string to bytes array:
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Sort array of objects by object fields
How can I sort this array of objects by one of its fields, like name or count ?
19 Answers
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Safe (bounds-checked) array lookup in Swift, through optional bindings?
If I have an array in Swift, and try to access an index that is out of bounds, there is an unsurprising runtime error:
19 A...
How can I force Powershell to return an array when a call only returns one object?
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Define the variable as an array in one of two ways...
Wrap your piped commands in parentheses with an @ at the beginning:
$serverIps = @(gwmi Win32_NetworkAdapterConfiguration
| Where { $_.IPAddress }
| Select -Expand IPAddress
| Wher...
What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
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For multi-dimensional arrays, the current best option in Haskell, in my view, is repa.
Repa provides high performance, regular, multi-dimensional, shape polymorphic parallel arrays. All numeric data is stored unboxed. Functions written with th...
Min/Max of dates in an array?
How can I find out the min and the max date from an array of dates? Currently, I am creating an array like this:
11 Answers...