* Elisp - Determine if variable is nil @ 2021-01-30 14:16 jai-bholeki 2021-01-30 14:57 ` moasenwood--- via Users list for the GNU Emacs text editor 2021-01-30 15:02 ` Jean Louis 0 siblings, 2 replies; 4+ messages in thread From: jai-bholeki @ 2021-01-30 14:16 UTC (permalink / raw To: Help Gnu Emacs How can I check if a variable is nil? ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Elisp - Determine if variable is nil 2021-01-30 14:16 Elisp - Determine if variable is nil jai-bholeki @ 2021-01-30 14:57 ` moasenwood--- via Users list for the GNU Emacs text editor 2021-01-30 15:03 ` jai-bholeki 2021-01-30 15:02 ` Jean Louis 1 sibling, 1 reply; 4+ messages in thread From: moasenwood--- via Users list for the GNU Emacs text editor @ 2021-01-30 14:57 UTC (permalink / raw To: help-gnu-emacs jai-bholeki wrote: > How can I check if a variable is nil? (setq some-var nil) (unless some-var (message "var is nil") ) -- underground experts united http://user.it.uu.se/~embe8573 https://dataswamp.org/~incal ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Elisp - Determine if variable is nil 2021-01-30 14:57 ` moasenwood--- via Users list for the GNU Emacs text editor @ 2021-01-30 15:03 ` jai-bholeki 0 siblings, 0 replies; 4+ messages in thread From: jai-bholeki @ 2021-01-30 15:03 UTC (permalink / raw To: moasenwood; +Cc: help-gnu-emacs When using pcase, do I need parenthesis around dfv-break-comments-state? (pcase dfv-break-comments-state (pcase (dfv-break-comments-state) > Sent: Sunday, January 31, 2021 at 2:57 AM > From: "moasenwood--- via Users list for the GNU Emacs text editor" <help-gnu-emacs@gnu.org> > To: help-gnu-emacs@gnu.org > Subject: Re: Elisp - Determine if variable is nil > > jai-bholeki wrote: > > > How can I check if a variable is nil? > > (setq some-var nil) > > (unless some-var > (message "var is nil") ) > > -- > underground experts united > http://user.it.uu.se/~embe8573 > https://dataswamp.org/~incal > > > ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Elisp - Determine if variable is nil 2021-01-30 14:16 Elisp - Determine if variable is nil jai-bholeki 2021-01-30 14:57 ` moasenwood--- via Users list for the GNU Emacs text editor @ 2021-01-30 15:02 ` Jean Louis 1 sibling, 0 replies; 4+ messages in thread From: Jean Louis @ 2021-01-30 15:02 UTC (permalink / raw To: help-gnu-emacs * jai-bholeki@gmx.com <jai-bholeki@gmx.com> [2021-01-30 17:34]: > How can I check if a variable is nil? If variable is defined then: (null variable) Return t if OBJECT is nil, and return nil otherwise. Jean ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-01-30 15:03 UTC | newest] Thread overview: 4+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2021-01-30 14:16 Elisp - Determine if variable is nil jai-bholeki 2021-01-30 14:57 ` moasenwood--- via Users list for the GNU Emacs text editor 2021-01-30 15:03 ` jai-bholeki 2021-01-30 15:02 ` Jean Louis
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