Hi David
That worked a treat. Thanks!
Adrian
On Feb 21, 4:55 am, David Nolen <dnolen.li...@gmail.com> wrote:
> for creates lazy sequences - this can be a problem if you need side
> effects. I suggest using doseq instead.
>
> David
>
> On Mon, Feb 20, 2012 at 11:26 AM, Adrian Mowat <adrian.mo...@gmail.com>wrote:
>
>
>
>
>
>
>
> > Hi Everyone,
>
> > I have been coding clojure for a few months and I've just started
> > using clojurescript and I am struggling to use for forms inside event
> > handlers. Sorry if this is covered elsewhere but I have searched as
> > best I can without finding the answers.
>
> > I have an event handler that listens for changes in an <input> element
>
> > (def search-input (dom/get-element "search"))
> > (def test-area (dom/get-element "test-area"))
> > (event/listen search-input
> > :keyup
> > (fn [e]
> > (let [search-results ["a" "b"]]
> > (dom/append test-area (dom/element :p {} (first search-
> > results)))
> > (dom/append test-area (dom/element :p {} (second search-
> > results))))))
>
> > It works fine. Everytime I type in the input box, some text is
> > appended to 'test-area'
>
> > However, this doesn't work any more when I switch to using for
>
> > (event/listen search-input
> > :keyup
> > (fn [e]
> > (let [search-results ["a" "b"]]
> > (for [x search-results] (dom/append test-area (dom/element :p {}
> > x))))))
>
> > Stepping through the generated code, I noticed that the generated
> > javascript calls the function with null as the first argument (second
> > last line below) but I can't figure out why or how to change the
> > behaviour.
>
> > clojure.browser.event.listen.call(null,
> > smws_numbers.cljs.smws_numbers.search_input, "\ufdd0'keyup",
> > function() {
> > return function b(c) {
> > return new cljs.core.LazySeq(null, !1, function() {
> > for(;;) {
> > if(cljs.core.truth_(cljs.core.seq.call(null, c))) {
> > var d = cljs.core.first.call(null, c);
> > return cljs.core.cons.call(null,
> > clojure.browser.dom.append.call(null,
> > smws_numbers.cljs.smws_numbers.test_area,
> > clojure.browser.dom.element.call(null, "\ufdd0'p",
> > cljs.core.ObjMap.fromObject([], {}), d)), b.call(null,
> > cljs.core.rest.call(null, c)))
> > }
> > return null
> > }
> > })
> > }.call(null, cljs.core.Vector.fromArray(["a", "b"]))
> > });
>
> > I fell sure I'm missing something fairly basic, but it's escaping me
> > for now so any help you can provide would be greatly appreciated.
>
> > Many Thanks
>
> > Adrian
>
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