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  • python - How do I get the last element of a list? - Stack Overflow
    In fact, you can do much more with this syntax The some_list[-n] syntax gets the nth-to-last element So some_list[-1] gets the last element, some_list[-2] gets the second to last, etc, all the way down to some_list[-len(some_list)], which gives you the first element You can also set list elements in this way For instance:
  • Access index of last element in data frame - Stack Overflow
    Trying to access the last element with the index df[12, "y"] yields (12, y) 5 (12, y) 5 dtype: int64 If you attempt to modify the dataframe based on the index (12, y) , you will modify two rows rather than one
  • java - what is the sense of final ArrayList? - Stack Overflow
    The final arrayList can still be modified, refer to the example below and run it to see for your self Here is the immutable class with immutable List declaration: public final class ImmutableClassWithArrayList { final List<String> theFinalListVar = new ArrayList<String>(); } And here is the driver:
  • How can I find the last element in a List lt; gt;? - Stack Overflow
    @chillitom after reading the source of System Linq Enumerable Last, I agree with 0b101010 - the Last() code ain't "optimized for List<>s" - Last() is just an ugly wrapper, which defaults to return list[list Count-1] in case the argument is an IList, and iterates over the list till the end in case it's not making it a very poor solution if the IList is a LinkedList, since the indexer will
  • How to remove the last element from 1 dimensional array
    def remove_last_element(arr): if not arr size: raise IndexError('cannot remove last element of empty array') keep = np ones(arr shape, dtype=bool) keep[-1] = False return arr[keep] If you would like more information on NumPys indexing the documentation on "Indexing" is quite good and covers a lot of cases 4 Using np delete()
  • How does the final keyword in Java work? (I can still modify an . . .
    I think final definition about variables is a bit short; "In Java, when final keyword is used with a variable of primitive data types (int, float, etc), value of the variable cannot be changed but When final is used with non-primitive variables (Note that non-primitive variables are always references to objects in Java), the members of the
  • How to get first and last element in an array in java?
    To get the first element, you can access it using index 0 To get the last element, you can access it
  • NumPy first and last element from array - Stack Overflow
    I am trying to dynamically get the first and last element from an array So, let us suppose the array has 6 elements test = [1,23,4,6,7,8] If I am trying to get the first and last = 1,8, 23,7
  • python - Remove final character from string - Stack Overflow
    Looking at the examples, it is worth to mention that lists are mutable and that list pop() method is the way to go when dealing with lists, as it removes the last item in place O(1), while [:-1] slicing creates a copy of a list without the last element in O(n-1) time plus O(n-1) space Strings are immutable - so nothing to add –
  • Declaring a List field with the final keyword - Stack Overflow
    A blank final is a final variable whose declaration lacks an initializer Once a final variable has been assigned, it always contains the same value If a final variable holds a reference to an object, then the state of the object may be changed by operations on the object, but the variable will always refer to the same object





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