Object doesn't support property or method 'map'

[lostrouter]

I am trying out Reactjs.Net and i am running into an error. I have chosen to forgo using jsx in favor of plain JS. i am not sure if this is the cause of my problem, but i am following the compiled js examples i have found in the reactjs tutorials. array.map.js is the code found here https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map. Do i have to use jsx?

the specific error
Error while rendering "BreadCrumbBox" to "react1": Object doesn't support property or method 'map'
Line: 8
Column:9

// SimpleReactor.js
var BreadCrumbBox = React.createClass({
    render: function () {
        var crumblets = this.props.crumbs.map(function (item, index) {
            return BreadCrumb({
                crumb: item,
                key: index
            });
        });
        return React.DOM.ul({}, crumblets);
    }
});


var BreadCrumb = React.createClass({
    render: function () {
        return React.DOM.ul({},
        React.DOM.a({
            href: this.props.crumb.Url.toString()
        }, this.props.crumb.Text));
    }
});

BreadCrumbBox = React.createFactory(BreadCrumbBox);
BreadCrumb = React.createFactory(BreadCrumb);

the above is my react script.

here is my react config

ReactSiteConfiguration.Configuration
            .AddScript("~/Scripts/array.map.js")
            .AddScript("~/Scripts/SimpleReactor.js");

here is my cshtml page

@using System
@using System.Web.Mvc
@using System.Web.Mvc.Ajax
@using System.Web.Mvc.Html
@using System.Web.Optimization
@using System.Linq
@using React
@using React.Web
@using React.Web.Mvc

@inherits System.Web.Mvc.WebViewPage<BreadCrumbModel>


@Html.React("BreadCrumbBox", new { crumbs = Model.Crumbs })

@section scripts{
    @Scripts.Render("~/Scripts/array.map.js")
    <script src="http://fb.me/react-0.12.0.js"></script>
    @Scripts.Render("~/Scripts/SimplerReactor.js")
    @Html.ReactInitJavaScript()
}

[lostrouter]

nevermind. my model that i was passing in was an ienumerable and not an array.

[Daniel15]

Out of curiosity, what was the IEnumerable being serialized as?

[lostrouter]

i did not dig in far enough to see. I will check soon.