A common problem in computing is to find out if a list contains duplicate entries. It’s also a good subject to explore various ways to solve a problem. In this case, we will see the performance ...

The awk command can make it easy to remove duplicate characters from a string even when those characters aren’t sequential, especially when the process is turned into a script. First, the awk ...

Duplicates in the same column are easy to find by sorting, filtering, and using conditional formatting. When none of those are an option, try this simple formula solution.

Install the Remove Duplicates add-on from the Google Workspace Marketplace. In your sheet, click Extensions, then Remove Duplicates, and choose: Find Duplicates or Uniques.

How can we find duplicate values across multiple columns? For this task, we’ll use two Excel helper formulas: One to concatenate the columns you’re comparing; a second to count the duplicates.