I have a hierarchical taxonomy called ‘geographical locations’. It contains continents on a first level, and then the countries for each one. Example : Europe – Ireland – Spain – Sweden Asia – Laos – Thailand – Vietnam etc. Using get_terms() I managed to output the full list of terms, but the continents get mixed … Read more
This question’s answers are a community effort. Edit existing answers to improve this post. It is not currently accepting new answers or interactions. How do I concatenate two lists in Python? Example: listone = [1, 2, 3] listtwo = [4, 5, 6] Expected outcome: >>> joinedlist [1, 2, 3, 4, 5, 6] 3 32 You … Read more
In Java the type of any variable is either a primitive type or a reference type. Generic type arguments must be reference types. Since primitives do not extend Object they cannot be used as generic type arguments for a parametrized type. Instead use the Integer class which is a wrapper for int: List<Integer> list = new ArrayList<Integer>(); If your using … Read more
Given a list [“foo”, “bar”, “baz”] and an item in the list “bar”, how do I get its index 1? 3 39 >>> [“foo”, “bar”, “baz”].index(“bar”) 1 Reference: Data Structures > More on Lists Caveats follow Note that while this is perhaps the cleanest way to answer the question as asked, index is a rather … Read more
I want to flatten this list of lists: [[1, 2, 3], [4, 5, 6], [7], [8, 9]] into: [1, 2, 3, 4, 5, 6, 7, 8, 9] 2 28
How do I access the index in a for loop? xs = [8, 23, 45] for x in xs: print(“item #{} = {}”.format(index, x)) Desired output: item #1 = 8 item #2 = 23 item #3 = 45 2 22
Almost always List is preferred over ArrayList because, for instance, List can be translated into a LinkedList without affecting the rest of the codebase. If one used ArrayList instead of List, it’s hard to change the ArrayList implementation into a LinkedList one because ArrayList specific methods have been used in the codebase that would also require restructuring. You can read about the List implementations here. You may start with an ArrayList, but soon after discover that … Read more
Firstly, you can’t do new List(); it is an interface. To make a list of int Arrays, do something like this : List<int[]> myList = new ArrayList<int[]>(); P.S. As per the comment, package for List is java.util.List and for ArrayList java.util.ArrayList
Incompatible types List of List and ArrayList of ArrayList
