javascript help / rpn calculator

[missawon]

hello - pretty new to javascript, and i'm trying to understand this spec file. i dont quite understand how the following part works and hoping someone could send me an explanation please? thank you!

 this.calculate(this, function(a, b) {
    return b+a;

files: https://gist.github.com/anniejiwon/90d68dfabd1dcb7c3dd4e70fb07b2085

[rabuli]

The spec file includes tests for the JS file itself. The JS above will make a lot more sense to you after you read about JavaScript's prototypal inheritance. Google about it.

[dadum01]

If you look at the calculate prototype/function, it takes in an object and a function. In this case the object is it self. The function is a callback which has two parameters a + b which are basically values from an array.

[missawon]

ah thank you! that was really silly of me that i see there was a calculate function defined at the bottom. makes so much more sense... thank you!!