gistfile1.js

dojo.declare("Foo", null, {
    url:"/example.txt",
    constructor: function(){

        dojo.xhrGet({
            url: this.url,
            
            // pass a string as 2nd to hitch(). means this._handler(): 
            load: dojo.hitch(this, "_handler"),
            
            // or a function. 1st arg means context to use
            error: dojo.hitch(this, function(response){
                /* `this` is the context of the instance, hitched before */
            })
            
        })
    },
    
    _handler: function(data){
        /* called by the xhr call in constructor */
    }
    
})