You would need to read your shells manual pages, particularly the line editing.
vi and emacs style line editing is available in most mainstream shells. I'm not sure if they implement the editors concept of yank/kill but it's worth a look.
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My Journal
Thou shalt check the array bounds of all strings (indeed, all arrays), for surely where thou typest ``foo'' someone someday shall type ``supercalifragilisticexpialidocious''.
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