function orderDescending(valueOne, valueTwo){ if(valueTwo > valueOne){ return 1; } if (valueTwo < valueOne) { return -1; } else{return 0;} } function orderAscending(valueOne, valueTwo){ if(valueTwo > valueOne){ return -1; } if (valueTwo < valueOne) { return 1; } else{return 0;} } var numbers = [1,4,27,4,8,0]; numbers.sort(orderAscending); //alert(numbers); numbers.sort(orderDescending); //alert(numbers);
But We can improve it, in this way ...
function Comparator(propertyName) { return function(objectOne, objectTwo){ var valueOne = objectOne[propertyName]; var valueTwo = objectTwo[propertyName]; if (value1 < value2){ return -1; } else if (value1 > value2){ return 1; } else { return 0; } }; }And We can use it in this way
var data = [{name: “PersonOne”, age: 1}, {name: “PersonTwo”, age: 2}]; data.sort(Comparator(“name”));
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