Accessing functions (prototype extension) inside another function - Javascript

Question

This is the javascript I'm trying to run in the terminal via jsc:

calc_real_weights.js:

getElementWithLowestCount(someMatrix)

Array.prototype.max = function() {
  return Math.max.apply(null, this);
};

Array.prototype.min = function() {
  return Math.min.apply(null, this);
};

function getElementWithLowestCount(countAndWeightMatrix){
    aux = []
    for(var i = 0; i < countAndWeightMatrix.length; i++){
        if (countAndWeightMatrix[i][0] < aux.min()){
          var min = countAndWeightMatrix[i];
        }
        aux.push(countAndWeightMatrix[i][0]);
    }
    return min;
}

The error:

Borjas-MacBook-Pro:Algorithm borjagvo$ jsc calc_real_weights.js
Exception: TypeError: undefined is not a function (evaluating 'aux.min()')
getElementWithLowestCount@calc_real_weights.js:37:46
calcRealWights@calc_real_weights.js:46:45
global code@calc_real_weights.js:18:33

It looks like getElementWithLowestCount doesn't see the Array prototype extension. How can I make it to see it?

Thanks.

Mir · Accepted Answer · 2015-05-21 08:58:01Z

2

I think that the problems comes from the fact that you are calling getElementWithLowestCount before changing the Array prototype. Try moving your call to getElementWithLowestCount after the two Array.prototipe blocks.

answered May 21, 2015 at 8:58

Mir

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