자바스크립트 With Statements

//Exposing the properties of the katana object using with(){}.
var use = "other";
var katana = {
    isSharp: true,
    use: function(){
        this.isSharp = !this.isSharp;
    }
};

with ( katana ) {
    assert( true, "You can still call outside methods." );
    isSharp = false;
    use();
    assert( use !== "other","Use is a function, from the katana object." );
    assert( this !== katana,"this isn't changed - it keeps its original value" );
}

assert( typeof isSharp === "undefined","Outside the with, the properties don't exist." );
assert( katana.isSharp,"Verify that the method was used correctly in the with." );