How can I automatically delete dates and times in rows with EmEditor?

Question

I have a text file. There are hundreds of different filenames in the text file. However, it says different date and time at the end of each file. Sample: life-in-cosmos-2021-11-11-12-45-46 or life-in-cosmos-2021-11-11-12-45.

In order to change the names of the files in bulk, I first need to delete the dates in this text file. So I want to automatically delete the dates and times in each row. However, I don't know anything about this. And I don't know how to use macros. Therefore, if there is a solution for this, can you provide an answer with a picture or video?

In order to explain my request more clearly, I present 2 examples.

Example:

Original Text: cosmos-lights-colors-T5DAPC-2020-09-11

The result I want to do: cosmos-lights-colors-T5DAPC

Example 2:

Original Text: cosmos-lights-colors-T5DAPC-2021-04-02-12-37-49-utc

The result I want to do: cosmos-lights-colors-T5DAPC

Answer 1

Assuming a date is always at end of each line, you can replace a regular expression with an empty string. To do this:

1. Press Ctrl+H to bring up the Replace dialog box, and set following options:

Find: -[0-9]{4}-[0-9]{2}-[0-9]{2}[0-9\-]*?(\-utc){0,1}$

Replace with: (blank)

Set the Regular Expressions option

2. First, click the Find Next button to highlight matches to make sure they are correct. If the matches are incorrect, you will need to adjust the regular expression.

3. Finally, click the Replace All button to remove all matched strings.

Before replace

cosmos-lights-colors-T5DAPC-2020-09-11
cosmos-lights-colors-T5DAPC-2021-04-02-12-37-49-utc

After replace

cosmos-lights-colors-T5DAPC
cosmos-lights-colors-T5DAPC