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emacs

Appending characters to the end of each line in Emacs

Assume I have a text file with content

1
123
12
12345

If I want to add an 'a' in the beginning of each line I can simply use string-rectangle (C-x r t), but what if I want to append an 'a' to the end of each line, after which the file should become

1a
123a
12a
12345a

Thanks.

Solution

  • You could use replace-regexp for this purpose, with the $ regexp metacharacter that matches end-of-line. Go to the start of the buffer, and then do M-x replace-regexp, and answer $ and (your text) to the two prompts.

    Or, in emacs-speak, for your specific example of adding a:

    M-< M-x replace-regexp RET $ RET a RET