How do you order a list based on another list?

How do you order a list based on another list?

Use zip() to sort a list based on another list

1. list1 = [“a”, “b”, “c”]
2. list2 = [2, 3, 1]
3. zipped_lists = zip(list2, list1) Pair list2 and list1 elements.
4. sorted_zipped_lists = sorted(zipped_lists) Sort by first element of each pair.
5. sorted_list1 = [element for _, element in sorted_zipped_lists]
6. print(sorted_list1)

How do you find the position of an item in a list?

The index() method returns the index of the specified element in the list….list index() parameters

1. element – the element to be searched.
2. start (optional) – start searching from this index.
3. end (optional) – search the element up to this index.

How do you find the position of an element in an array?

To find the position of an element in an array, you use the indexOf() method. This method returns the index of the first occurrence the element that you want to find, or -1 if the element is not found. The following illustrates the syntax of the indexOf() method.

How do I create a custom list?

Create a custom list

1. For Excel 2010 and later, click File > Options > Advanced > General > Edit Custom Lists.
2. For Excel 2007, click the Microsoft Office Button.
3. In the Custom Lists box, click NEW LIST, and then type the entries in the List entries box, beginning with the first entry.
4. When the list is complete, click Add.

How do you sort two arrays?

In this approach, two arrays are merged into one and then the merged array is sorted finally. Declare two arrays and input the array elements in both the arrays. Concatenate both the arrays. Sort the concatenated array.

How to sort list while also returning original index positions?

– Stack Overflow C# Sort list while also returning the original index positions? I’m interested in sorting a collection, but also returning an index which can be used to map to the original position in the collection (before the sort). Does C#/.Net have any built in mechanism to make this easy to implement? Thanks.

How do you sort one list based on another?

If the references are not the same but there is some equivalence relationship between objects in listA and listB, you could sort listA using a custom Comparator that finds the object in listB and uses its index in listB as the sort key.

How to use list sort method in Python?

Python List sort () Method 1 Definition and Usage. The sort () method sorts the list ascending by default. You can also make a function to decide the… 2 Syntax. 3 Parameter Values. Optional. reverse=True will sort the list descending. 4 More Examples. More

How to sort list in C # /.NET?

Does C#/.Net have any built in mechanism to make this easy to implement? Thanks. It can be done quite easily using Linq. Convert your list into a new list of pairs (object, original index of object). Extract the sorted list and the original indices. I think this gives A [idx [i]] = B [i], but that hopefully is good enough for you.