PrioritySorting

PrioritySorting.js

//Problem to sort and get port with minimum bandwith, based on switch priority(Select same switch first)
var ports = [{
        id: 1,
        switch: 'a',
        availableBandWidth: 500
    },{
        id: 2,
        switch: 'b',
        availableBandWidth: 10
    },{
        id: 3,
        switch: 'a',
        availableBandWidth: 50
    },{
        id: 4,
        switch: 'b',
        availableBandWidth: 100
    },{
        id: 5,
        switch: 'a',
        availableBandWidth: 100
    },{
        id: 6,
        switch: 'b',
        availableBandWidth: 5
    }
];

var reqSwitch = 'a';
var selected;
function getMinPort(p1, p2){
    if (p1.switch == reqSwitch && p2.switch == reqSwitch) {
        return p1.availableBandWidth - p2.availableBandWidth;
    }
    else if (p1.switch == reqSwitch && p2.switch != reqSwitch) {
        return -1;
    }
    else if (p2.switch == reqSwitch && p1.s != reqSwitch) {
        return 1
    }
    else {
        return p1.availableBandWidth - p2.availableBandWidth;
    }

}
console.log("Best selected:", ports.sort(getMinPort)[0]);
 reqSwitch = 'b';
console.log("Best selected:", ports.sort(getMinPort)[0]);
 reqSwitch = 'c';
console.log("Best selected:", ports.sort(getMinPort)[0]);
//Output
//Best selected: { id: 3, switch: 'a', availableBandWidth: 50 }
//Best selected: { id: 6, switch: 'b', availableBandWidth: 5 }
//Best selected: { id: 6, switch: 'b', availableBandWidth: 5 }
var utils = {
  sortByPriority:sortByPriority
};
function sortByPriority(arr, comparator, priorityComparator){
    if(!arr || !arr.length){
        return arr;
    }
    function combiner(p1, p2){
        if(priorityComparator(p1) && !priorityComparator(p2)){
            return -1;
        }
        else if(!priorityComparator(p1) && priorityComparator(p2)){
            return 1;
        }
        else {
            return comparator(p1, p2);
        }
    }
    return arr.sort(combiner);
}
function portWithMinBandWidth(p1, p2){
    return p1.availableBandWidth - p2.availableBandWidth
}
function switchPriority(p1){
    return reqSwitch == p1.switch
}
reqSwitch ='a';
var sortedData = utils.sortByPriority(ports, portWithMinBandWidth,switchPriority);
console.log("Best selected:", sortedData[0]);
reqSwitch ='b';
sortedData = utils.sortByPriority(ports, portWithMinBandWidth,switchPriority);
console.log("Best selected:", sortedData[0]);
reqSwitch ='c';
sortedData = utils.sortByPriority(ports, portWithMinBandWidth,switchPriority);
console.log("Best selected:", sortedData[0]);

//Output
//Best selected: { id: 3, switch: 'a', availableBandWidth: 50 }
//Best selected: { id: 6, switch: 'b', availableBandWidth: 5 }
//Best selected: { id: 6, switch: 'b', availableBandWidth: 5 }