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det finns ett X så att X är en person och X har ett paraply | |
person(X), har(X, paraply). | |
det finns ett X så att om X är en person så har X ett paraply | |
person(X) -> har(X, paraply). | |
det finns inte ett X så att X inte har ett paraply | |
<=> för alla X som är en person så har X ett paraply | |
not(person(X), not(har(X, paraply)). |
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fun! JumpPreviousBuffer() | |
let [jumplist, curjump] = getjumplist() | |
let tgtjump = curjump - 1 | |
while 0 <= tgtjump && jumplist[tgtjump]['bufnr'] == bufnr() | |
let tgtjump -= 1 | |
endwhile | |
if tgtjump < 0 | |
echoerr 'No previous buffer in jumplist' | |
return | |
endif |
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