* build-in function for obtaining the index of an element of a list
@ 2012-01-04 6:33 ishi soichi
2012-01-04 12:51 ` Juanma Barranquero
0 siblings, 1 reply; 3+ messages in thread
From: ishi soichi @ 2012-01-04 6:33 UTC (permalink / raw)
To: help-gnu-emacs
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I have a question about Emacs Lisp.
Is there any Emacs built-in function that returns the index of an element
of a list?
More specifically, say I have a list
(setq lista '("apple" "banana" "orange))
then implement the function, which I want,
(functionName lista "banana") ; => 1
If not, please give me an example of such function definition.
Thanks in advance!
soichi
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: build-in function for obtaining the index of an element of a list 2012-01-04 6:33 build-in function for obtaining the index of an element of a list ishi soichi @ 2012-01-04 12:51 ` Juanma Barranquero 2012-01-04 23:52 ` ishi soichi 0 siblings, 1 reply; 3+ messages in thread From: Juanma Barranquero @ 2012-01-04 12:51 UTC (permalink / raw) To: ishi soichi; +Cc: help-gnu-emacs > Is there any Emacs built-in function that returns the index of an element of > a list? If you don't mind using the CL package (included with Emacs), the function you want is `position' (position "banana" '("apple" "banana" "orange") :test 'string=) => 1 Juanma ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: build-in function for obtaining the index of an element of a list 2012-01-04 12:51 ` Juanma Barranquero @ 2012-01-04 23:52 ` ishi soichi 0 siblings, 0 replies; 3+ messages in thread From: ishi soichi @ 2012-01-04 23:52 UTC (permalink / raw) To: Juanma Barranquero; +Cc: help-gnu-emacs [-- Attachment #1: Type: text/plain, Size: 381 bytes --] Thanks. This is what I wanted. soichi 2012/1/4 Juanma Barranquero <lekktu@gmail.com> > > Is there any Emacs built-in function that returns the index of an > element of > > a list? > > If you don't mind using the CL package (included with Emacs), the > function you want is `position' > > (position "banana" '("apple" "banana" "orange") :test 'string=) => 1 > > Juanma > [-- Attachment #2: Type: text/html, Size: 804 bytes --] ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2012-01-04 23:52 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2012-01-04 6:33 build-in function for obtaining the index of an element of a list ishi soichi 2012-01-04 12:51 ` Juanma Barranquero 2012-01-04 23:52 ` ishi soichi
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