Not a text editor, but there was a ScriptManager that was kind of a worksapce with ability to give scripts a name, save them, and then easily browse and execute them. But this is a bit old, so not sure if this still works in Pharo 4.0:
Hi,
I wanted to do a little text editor and I would like to know if
someone already did one with simple features like open a file, save a
file etc...
I don't want to lose too much time in something that already exist.
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Cheers
Cyril Ferlicot