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It's hard enough to find an error in your code when you're looking for it; it's even harder when you've assumed your code is error-free. |
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I actually come from the "bang-something" side where it used to be the only way to refer to history back in the tcsh days, and keep surprising my colleagues with my "!:"-fu magic sequences :)
One correction I have is that most (all?) the mentions you made to "!!:x" (e.g. "!!:2") can be actually typed as "!:x" (i.e. one "!" is enough). Only "!!" by itself to repeat the last line and execute it immediately requires two "!".
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