[ClojureScript] Re: map with anonymous function
As others have said, #() is like a function body, so the first item in its list
must be callable or a macro. But no one mentioned you can use "do":
#(do [:th %])
On Sunday, August 3, 2014 7:53:47 AM UTC-5, Paul Cowan wrote:
> I am using om and soblano and I have a map function that works when I declare
> at like this, on the last line of the function below:
>
>
>
> (defn ical [data]
> (reify
> om/IDisplayName
>
> (display-name [_]
> (or (:react-name opts) "calendar"))
> om/IRender
> (render [this]
> (html/html [:div
> [:div.calendar-toolbar
>
> [:div.btn-group.pull-right
> [:a.right {:href "#"} "Right"]
> [:a.left {:href "#"} "Left"]]
>
> [:h3 "August 2014"]]
> [:table.table
> [:thead
> [:tr (map (fn [day] [:th day]) weekdays)
>
>
>
> But when I try and use the map with the anonymous function syntax like this:
>
>
> [:table.table
> [:thead
> [:tr (map ([:th %]) weekdays)
>
>
> I get the following error:
>
> Uncaught Error: Invalid arity: 1
>
>
>
>
>
> Cheers
>
> Paul Cowan
>
> Cutting-Edge Solutions (Scotland)
>
>
> blog: http://thesoftwaresimpleton.com/
>
> website: http://www.cuttingedgesolutionsscotland.com/
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Re: [ClojureScript] Re: map with anonymous function
Rather than use identity, I usually do this: #(vector :th %)
On 3 August 2014 21:11, Shaun Gilchrist wrote:
> identity is just a function that returns its argument. It may be more
> readable to do #(vec [:th %]). And just for golf-sake you could also do
> (map (partial conj [:th]) weekdays). All that said I think the "for"
> approach is the easiest to read.
>
>
> On Sun, Aug 3, 2014 at 12:54 PM, Paul Cowan wrote:
>
>> Right in both counts, thanks!
>>
>> Could you explain why identity is needed in this instance, I'm new to
>> clojure and I don't quite get why it is need specifically here.
>>
>> Cheers
>>
>> Paul Cowan
>>
>> Cutting-Edge Solutions (Scotland)
>>
>> blog: http://thesoftwaresimpleton.com/
>> website: http://www.cuttingedgesolutionsscotland.com/
>>
>>
>> On 3 August 2014 19:31, Shaun Gilchrist wrote:
>>
>>> Consider that what you are doing expands to the application of a vector
>>> to nothing (thus the error):
>>>
>>> (fn [x] ([:th x]))
>>>
>>> What you are most likely after is #(identity [:th %]]
>>>
>>> But perhaps more readably - [:tr (for [day weekdays] [:th day])]
>>>
>>>
>>>
>>> On Sun, Aug 3, 2014 at 11:18 AM, Paul Cowan wrote:
>>>
Hi,
Sorry that was a typo on my part, that is what I have and it still
gives the same error:
[:table.table.table-striped.table-bordered.table-hover
[:thead
[:tr (map #([:th %]) weekdays)
And it gives the error:
Uncaught Error: Invalid arity: 1
Is this a clojurescript error? Can you not use anonymous functions in
clojurescript
Cheers
Paul Cowan
Cutting-Edge Solutions (Scotland)
blog: http://thesoftwaresimpleton.com/
website: http://www.cuttingedgesolutionsscotland.com/
On 3 August 2014 18:08, Johann Bestowrous
wrote:
> Hey Paul--
>
> try this:
>
> [:table.table
> [:thead
> [:tr (map #([:th %]) weekdays)
>
> #() is an anonymous function literal.
>
> On Sunday, August 3, 2014 5:53:47 AM UTC-7, Paul Cowan wrote:
> > I am using om and soblano and I have a map function that works when
> I declare at like this, on the last line of the function below:
> >
> >
> >
> > (defn ical [data]
> > (reify
> > om/IDisplayName
> >
> > (display-name [_]
> > (or (:react-name opts) "calendar"))
> > om/IRender
> > (render [this]
> > (html/html [:div
> >[:div.calendar-toolbar
> >
> > [:div.btn-group.pull-right
> > [:a.right {:href "#"} "Right"]
> > [:a.left {:href "#"} "Left"]]
> >
> > [:h3 "August 2014"]]
> > [:table.table
> > [:thead
> > [:tr (map (fn [day] [:th day])
> weekdays)
> >
> >
> >
> > But when I try and use the map with the anonymous function syntax
> like this:
> >
> >
> > [:table.table
> > [:thead
> > [:tr (map ([:th %]) weekdays)
> >
> >
> > I get the following error:
> >
> > Uncaught Error: Invalid arity: 1
> >
> >
> >
> >
> >
> > Cheers
> >
> > Paul Cowan
> >
> > Cutting-Edge Solutions (Scotland)
> >
> >
> > blog: http://thesoftwaresimpleton.com/
> >
> > website: http://www.cuttingedgesolutionsscotland.com/
>
> --
> Note that posts from new members are moderated - please be patient
> with your first post.
> ---
> You received this message because you are subscribed to the Google
> Groups "ClojureScript" group.
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>
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>>>
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>>> To u
Re: [ClojureScript] Re: map with anonymous function
identity is just a function that returns its argument. It may be more
readable to do #(vec [:th %]). And just for golf-sake you could also do
(map (partial conj [:th]) weekdays). All that said I think the "for"
approach is the easiest to read.
On Sun, Aug 3, 2014 at 12:54 PM, Paul Cowan wrote:
> Right in both counts, thanks!
>
> Could you explain why identity is needed in this instance, I'm new to
> clojure and I don't quite get why it is need specifically here.
>
> Cheers
>
> Paul Cowan
>
> Cutting-Edge Solutions (Scotland)
>
> blog: http://thesoftwaresimpleton.com/
> website: http://www.cuttingedgesolutionsscotland.com/
>
>
> On 3 August 2014 19:31, Shaun Gilchrist wrote:
>
>> Consider that what you are doing expands to the application of a vector
>> to nothing (thus the error):
>>
>> (fn [x] ([:th x]))
>>
>> What you are most likely after is #(identity [:th %]]
>>
>> But perhaps more readably - [:tr (for [day weekdays] [:th day])]
>>
>>
>>
>> On Sun, Aug 3, 2014 at 11:18 AM, Paul Cowan wrote:
>>
>>> Hi,
>>>
>>> Sorry that was a typo on my part, that is what I have and it still gives
>>> the same error:
>>>
>>>
>>> [:table.table.table-striped.table-bordered.table-hover
>>> [:thead
>>> [:tr (map #([:th %]) weekdays)
>>>
>>> And it gives the error:
>>>
>>>
>>> Uncaught Error: Invalid arity: 1
>>> Is this a clojurescript error? Can you not use anonymous functions in
>>> clojurescript
>>>
>>>
>>> Cheers
>>>
>>> Paul Cowan
>>>
>>> Cutting-Edge Solutions (Scotland)
>>>
>>> blog: http://thesoftwaresimpleton.com/
>>> website: http://www.cuttingedgesolutionsscotland.com/
>>>
>>>
>>> On 3 August 2014 18:08, Johann Bestowrous
>>> wrote:
>>>
Hey Paul--
try this:
[:table.table
[:thead
[:tr (map #([:th %]) weekdays)
#() is an anonymous function literal.
On Sunday, August 3, 2014 5:53:47 AM UTC-7, Paul Cowan wrote:
> I am using om and soblano and I have a map function that works when I
declare at like this, on the last line of the function below:
>
>
>
> (defn ical [data]
> (reify
> om/IDisplayName
>
> (display-name [_]
> (or (:react-name opts) "calendar"))
> om/IRender
> (render [this]
> (html/html [:div
>[:div.calendar-toolbar
>
> [:div.btn-group.pull-right
> [:a.right {:href "#"} "Right"]
> [:a.left {:href "#"} "Left"]]
>
> [:h3 "August 2014"]]
> [:table.table
> [:thead
> [:tr (map (fn [day] [:th day])
weekdays)
>
>
>
> But when I try and use the map with the anonymous function syntax
like this:
>
>
> [:table.table
> [:thead
> [:tr (map ([:th %]) weekdays)
>
>
> I get the following error:
>
> Uncaught Error: Invalid arity: 1
>
>
>
>
>
> Cheers
>
> Paul Cowan
>
> Cutting-Edge Solutions (Scotland)
>
>
> blog: http://thesoftwaresimpleton.com/
>
> website: http://www.cuttingedgesolutionsscotland.com/
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>>>
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>>> Note that posts from new members are moderated - please be patient with
>>> your first post.
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>>
>> --
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>> your first post.
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>>
>
> --
> Note
Re: [ClojureScript] Re: map with anonymous function
Right in both counts, thanks!
Could you explain why identity is needed in this instance, I'm new to
clojure and I don't quite get why it is need specifically here.
Cheers
Paul Cowan
Cutting-Edge Solutions (Scotland)
blog: http://thesoftwaresimpleton.com/
website: http://www.cuttingedgesolutionsscotland.com/
On 3 August 2014 19:31, Shaun Gilchrist wrote:
> Consider that what you are doing expands to the application of a vector to
> nothing (thus the error):
>
> (fn [x] ([:th x]))
>
> What you are most likely after is #(identity [:th %]]
>
> But perhaps more readably - [:tr (for [day weekdays] [:th day])]
>
>
>
> On Sun, Aug 3, 2014 at 11:18 AM, Paul Cowan wrote:
>
>> Hi,
>>
>> Sorry that was a typo on my part, that is what I have and it still gives
>> the same error:
>>
>> [:table.table.table-striped.table-bordered.table-hover
>> [:thead
>> [:tr (map #([:th %]) weekdays)
>>
>> And it gives the error:
>>
>>
>> Uncaught Error: Invalid arity: 1
>> Is this a clojurescript error? Can you not use anonymous functions in
>> clojurescript
>>
>>
>> Cheers
>>
>> Paul Cowan
>>
>> Cutting-Edge Solutions (Scotland)
>>
>> blog: http://thesoftwaresimpleton.com/
>> website: http://www.cuttingedgesolutionsscotland.com/
>>
>>
>> On 3 August 2014 18:08, Johann Bestowrous
>> wrote:
>>
>>> Hey Paul--
>>>
>>> try this:
>>>
>>> [:table.table
>>> [:thead
>>> [:tr (map #([:th %]) weekdays)
>>>
>>> #() is an anonymous function literal.
>>>
>>> On Sunday, August 3, 2014 5:53:47 AM UTC-7, Paul Cowan wrote:
>>> > I am using om and soblano and I have a map function that works when I
>>> declare at like this, on the last line of the function below:
>>> >
>>> >
>>> >
>>> > (defn ical [data]
>>> > (reify
>>> > om/IDisplayName
>>> >
>>> > (display-name [_]
>>> > (or (:react-name opts) "calendar"))
>>> > om/IRender
>>> > (render [this]
>>> > (html/html [:div
>>> >[:div.calendar-toolbar
>>> >
>>> > [:div.btn-group.pull-right
>>> > [:a.right {:href "#"} "Right"]
>>> > [:a.left {:href "#"} "Left"]]
>>> >
>>> > [:h3 "August 2014"]]
>>> > [:table.table
>>> > [:thead
>>> > [:tr (map (fn [day] [:th day])
>>> weekdays)
>>> >
>>> >
>>> >
>>> > But when I try and use the map with the anonymous function syntax like
>>> this:
>>> >
>>> >
>>> > [:table.table
>>> > [:thead
>>> > [:tr (map ([:th %]) weekdays)
>>> >
>>> >
>>> > I get the following error:
>>> >
>>> > Uncaught Error: Invalid arity: 1
>>> >
>>> >
>>> >
>>> >
>>> >
>>> > Cheers
>>> >
>>> > Paul Cowan
>>> >
>>> > Cutting-Edge Solutions (Scotland)
>>> >
>>> >
>>> > blog: http://thesoftwaresimpleton.com/
>>> >
>>> > website: http://www.cuttingedgesolutionsscotland.com/
>>>
>>> --
>>> Note that posts from new members are moderated - please be patient with
>>> your first post.
>>> ---
>>> You received this message because you are subscribed to the Google
>>> Groups "ClojureScript" group.
>>> To unsubscribe from this group and stop receiving emails from it, send
>>> an email to clojurescript+unsubscr...@googlegroups.com.
>>> To post to this group, send email to clojurescript@googlegroups.com.
>>> Visit this group at http://groups.google.com/group/clojurescript.
>>>
>>
>> --
>> Note that posts from new members are moderated - please be patient with
>> your first post.
>> ---
>> You received this message because you are subscribed to the Google Groups
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>> To unsubscribe from this group and stop receiving emails from it, send an
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>>
>
> --
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Re: [ClojureScript] Re: map with anonymous function
Consider that what you are doing expands to the application of a vector to
nothing (thus the error):
(fn [x] ([:th x]))
What you are most likely after is #(identity [:th %]]
But perhaps more readably - [:tr (for [day weekdays] [:th day])]
On Sun, Aug 3, 2014 at 11:18 AM, Paul Cowan wrote:
> Hi,
>
> Sorry that was a typo on my part, that is what I have and it still gives
> the same error:
>
> [:table.table.table-striped.table-bordered.table-hover
> [:thead
> [:tr (map #([:th %]) weekdays)
>
> And it gives the error:
>
>
> Uncaught Error: Invalid arity: 1
> Is this a clojurescript error? Can you not use anonymous functions in
> clojurescript
>
>
> Cheers
>
> Paul Cowan
>
> Cutting-Edge Solutions (Scotland)
>
> blog: http://thesoftwaresimpleton.com/
> website: http://www.cuttingedgesolutionsscotland.com/
>
>
> On 3 August 2014 18:08, Johann Bestowrous
> wrote:
>
>> Hey Paul--
>>
>> try this:
>>
>> [:table.table
>> [:thead
>> [:tr (map #([:th %]) weekdays)
>>
>> #() is an anonymous function literal.
>>
>> On Sunday, August 3, 2014 5:53:47 AM UTC-7, Paul Cowan wrote:
>> > I am using om and soblano and I have a map function that works when I
>> declare at like this, on the last line of the function below:
>> >
>> >
>> >
>> > (defn ical [data]
>> > (reify
>> > om/IDisplayName
>> >
>> > (display-name [_]
>> > (or (:react-name opts) "calendar"))
>> > om/IRender
>> > (render [this]
>> > (html/html [:div
>> >[:div.calendar-toolbar
>> >
>> > [:div.btn-group.pull-right
>> > [:a.right {:href "#"} "Right"]
>> > [:a.left {:href "#"} "Left"]]
>> >
>> > [:h3 "August 2014"]]
>> > [:table.table
>> > [:thead
>> > [:tr (map (fn [day] [:th day])
>> weekdays)
>> >
>> >
>> >
>> > But when I try and use the map with the anonymous function syntax like
>> this:
>> >
>> >
>> > [:table.table
>> > [:thead
>> > [:tr (map ([:th %]) weekdays)
>> >
>> >
>> > I get the following error:
>> >
>> > Uncaught Error: Invalid arity: 1
>> >
>> >
>> >
>> >
>> >
>> > Cheers
>> >
>> > Paul Cowan
>> >
>> > Cutting-Edge Solutions (Scotland)
>> >
>> >
>> > blog: http://thesoftwaresimpleton.com/
>> >
>> > website: http://www.cuttingedgesolutionsscotland.com/
>>
>> --
>> Note that posts from new members are moderated - please be patient with
>> your first post.
>> ---
>> You received this message because you are subscribed to the Google Groups
>> "ClojureScript" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to clojurescript+unsubscr...@googlegroups.com.
>> To post to this group, send email to clojurescript@googlegroups.com.
>> Visit this group at http://groups.google.com/group/clojurescript.
>>
>
> --
> Note that posts from new members are moderated - please be patient with
> your first post.
> ---
> You received this message because you are subscribed to the Google Groups
> "ClojureScript" group.
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Re: [ClojureScript] Re: map with anonymous function
Hi,
Sorry that was a typo on my part, that is what I have and it still gives
the same error:
[:table.table.table-striped.table-bordered.table-hover
[:thead
[:tr (map #([:th %]) weekdays)
And it gives the error:
Uncaught Error: Invalid arity: 1
Is this a clojurescript error? Can you not use anonymous functions in
clojurescript
Cheers
Paul Cowan
Cutting-Edge Solutions (Scotland)
blog: http://thesoftwaresimpleton.com/
website: http://www.cuttingedgesolutionsscotland.com/
On 3 August 2014 18:08, Johann Bestowrous
wrote:
> Hey Paul--
>
> try this:
>
> [:table.table
> [:thead
> [:tr (map #([:th %]) weekdays)
>
> #() is an anonymous function literal.
>
> On Sunday, August 3, 2014 5:53:47 AM UTC-7, Paul Cowan wrote:
> > I am using om and soblano and I have a map function that works when I
> declare at like this, on the last line of the function below:
> >
> >
> >
> > (defn ical [data]
> > (reify
> > om/IDisplayName
> >
> > (display-name [_]
> > (or (:react-name opts) "calendar"))
> > om/IRender
> > (render [this]
> > (html/html [:div
> >[:div.calendar-toolbar
> >
> > [:div.btn-group.pull-right
> > [:a.right {:href "#"} "Right"]
> > [:a.left {:href "#"} "Left"]]
> >
> > [:h3 "August 2014"]]
> > [:table.table
> > [:thead
> > [:tr (map (fn [day] [:th day])
> weekdays)
> >
> >
> >
> > But when I try and use the map with the anonymous function syntax like
> this:
> >
> >
> > [:table.table
> > [:thead
> > [:tr (map ([:th %]) weekdays)
> >
> >
> > I get the following error:
> >
> > Uncaught Error: Invalid arity: 1
> >
> >
> >
> >
> >
> > Cheers
> >
> > Paul Cowan
> >
> > Cutting-Edge Solutions (Scotland)
> >
> >
> > blog: http://thesoftwaresimpleton.com/
> >
> > website: http://www.cuttingedgesolutionsscotland.com/
>
> --
> Note that posts from new members are moderated - please be patient with
> your first post.
> ---
> You received this message because you are subscribed to the Google Groups
> "ClojureScript" group.
> To unsubscribe from this group and stop receiving emails from it, send an
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> Visit this group at http://groups.google.com/group/clojurescript.
>
--
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[ClojureScript] Re: map with anonymous function
Hey Paul--
try this:
[:table.table
[:thead
[:tr (map #([:th %]) weekdays)
#() is an anonymous function literal.
On Sunday, August 3, 2014 5:53:47 AM UTC-7, Paul Cowan wrote:
> I am using om and soblano and I have a map function that works when I declare
> at like this, on the last line of the function below:
>
>
>
> (defn ical [data]
> (reify
> om/IDisplayName
>
> (display-name [_]
> (or (:react-name opts) "calendar"))
> om/IRender
> (render [this]
> (html/html [:div
> [:div.calendar-toolbar
>
> [:div.btn-group.pull-right
> [:a.right {:href "#"} "Right"]
> [:a.left {:href "#"} "Left"]]
>
> [:h3 "August 2014"]]
> [:table.table
> [:thead
> [:tr (map (fn [day] [:th day]) weekdays)
>
>
>
> But when I try and use the map with the anonymous function syntax like this:
>
>
> [:table.table
> [:thead
> [:tr (map ([:th %]) weekdays)
>
>
> I get the following error:
>
> Uncaught Error: Invalid arity: 1
>
>
>
>
>
> Cheers
>
> Paul Cowan
>
> Cutting-Edge Solutions (Scotland)
>
>
> blog: http://thesoftwaresimpleton.com/
>
> website: http://www.cuttingedgesolutionsscotland.com/
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