An Ember helper that prevents user-facing NaN values.

SafeFloat.js

/**
 * Prevents displaying NaN to the user. Defaults to 0.
 */
Ember.Handlebars.helper("safefloat", function(value, options) {
    if (Ember.isEmpty(value) || isNaN(value)) {
        value = 0;
    }
    
    return new Ember.Handlebars.SafeString(value);
});