Intersection of two lists, keeping duplicates in the first list

by

What do you mean you don’t want to use loops? You’re going to have to iterate over it one way or another. Just take in each item individually and check if it’s in array2 as you go:

items = set(array2)
found = [i for i in array1 if i in items]

Furthermore, depending on how you are going to use the result, consider having a generator:

found = (i for i in array1 if i in array2)

so that you won’t have to have the whole thing in memory all at once.

More Related Contents:

  1. How do you remove duplicates from a list whilst preserving order?
  2. Removing duplicates in lists
  3. Drop all duplicate rows across multiple columns in Python Pandas
  4. How do I find the duplicates in a list and create another list with them?
  5. Removing elements that have consecutive duplicates
  6. Remove pandas rows with duplicate indices
  7. Remove duplicates by columns A, keeping the row with the highest value in column B
  8. How do I get a list of all the duplicate items using pandas in python?
  9. Python json parser allow duplicate keys
  10. Remove duplicates from dataframe, based on two columns A,B, keeping row with max value in another column C
  11. Removing Duplicates From Dictionary
  12. How do I remove duplicates from a list, while preserving order?
  13. Group duplicate column IDs in pandas dataframe
  14. How to find duplicate elements in array using for loop in Python?
  15. How can I remove duplicate words in a string with Python?
  16. Remove duplicate rows from Pandas dataframe where only some columns have the same value
  17. TypeError: unhashable type: ‘list’ when using built-in set function
  18. Finding duplicate files and removing them
  19. How to remove duplicates only if consecutive in a string? [duplicate]
  20. Remove duplicates and original from list
  21. How can I find same values in a list and group together a new list?
  22. drop_duplicates not working in pandas?
  23. Duplicate each member in a list [duplicate]
  24. Python: Remove Duplicate Items from Nested list
  25. Duplicating model instances and their related objects in Django / Algorithm for recusrively duplicating an object
  26. Python: Rename duplicates in list with progressive numbers without sorting list
  27. Detect duplicate MP3 files with different bitrates and/or different ID3 tags?
  28. How to repeat a Pandas DataFrame?
  29. python remove duplicates from 2 lists
  30. How to “select distinct” across multiple data frame columns in pandas?

Leave a Comment