call javascript object method with a variable

Question

i am new to object oriented javascript. I have a variable whose value i would like to use to call an object's method. like this..

var foo = {
    bar: function() {},
    barr: function() {}
}

now there is a variable whose value can be any of the two method's names bar and barr i want to call them with something like

var myvar = 'bar';
foo.{myVar}();

Answer 1

So I assume you want to call the appropriate function dynamically based on a string. You can do something like this:

var myVar = 'bar';
foo[myVar]();

Or you can also use eval but this is riskier (prone to injection attack) and slower (don't do this! :P):

var myVar = 'bar';
eval('foo.' + myVar + '()');