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Convert an array of primitive longs into a List of Longs
...first attempt surprisingly completely failed to work. I wanted to take an array of primitive longs and turn it into a list, which I attempted to do like this:
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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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How to add a new row to an empty numpy array
Using standard Python arrays, I can do the following:
6 Answers
6
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Why do I get an UnsupportedOperationException when trying to remove an element from a List?
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Quite a few problems with your code:
On Arrays.asList returning a fixed-size list
From the API:
Arrays.asList: Returns a fixed-size list backed by the specified array.
You can't add to it; you can't remove from it. You can't structurally modify the List.
Fi...
How do I pick randomly from an array?
...aner way of doing this. Basically, I want to pick a random element from an array of variable length. Normally, I would do it like this:
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What do we mean by Byte array? [closed]
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A byte is 8 bits (binary data).
A byte array is an array of bytes (tautology FTW!).
You could use a byte array to store a collection of binary data, for example, the contents of a file. The downside to this is that the entire file contents must be loaded into mem...
Sorting arrays in NumPy by column
How can I sort an array in NumPy by the nth column?
13 Answers
13
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List comprehension in Ruby
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If you really want to, you can create an Array#comprehend method like this:
class Array
def comprehend(&block)
return self if block.nil?
self.collect(&block).compact
end
end
some_array = [1, 2, 3, 4, 5, 6]
new_array = some_array.comprehend {|x|...
Fast stable sorting algorithm implementation in javascript
I'm looking to sort an array of about 200-300 objects, sorting on a specific key and a given order (asc/desc). The order of results must be consistent and stable.
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Return index of greatest value in an array
...wice as many comparisons as necessary and will throw a RangeError on large arrays, though. I’d stick to the function.
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