* 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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* 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
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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
>
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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
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