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(file-readable-p "files.texi") ⇒ t
(file-exists-p "/usr/spool/mqueue") ⇒ t
(file-readable-p "/usr/spool/mqueue") ⇒ nil
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(file-writable-p "~/foo") ⇒ t
(file-writable-p "/foo") ⇒ nil
(file-writable-p "~/no-such-dir/foo") ⇒ nil
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(file-accessible-directory-p "/foo") ⇒ nil
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filename1¤¬Â¸ºß¤·¤Ê¤±¤ì¤Ðnil
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filename2¤¬Â¸ºß¤·¤Ê¤±¤ì¤Ðt
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(file-newer-than-file-p "aug-19" "aug-20") ⇒ nil
(file-newer-than-file-p "aug-20" "aug-19") ⇒ t
(file-newer-than-file-p "aug-19" "no-file") ⇒ t
(file-newer-than-file-p "no-file" "aug-19") ⇒ nil
file-attributes
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