JS作为值的函数用法示例

function callSomeFunction(someFunction,someArgument){
   return someFunction(someArgument);
}

function add10(num){
  return num+10;
}
var result = callSomeFunction(add10,10);
alert(result) //20

function createComparisonFunction(propertyName){
   return function (object1,object2){
       var value1 = object1[propertyName];
        var value2 = object2[propertyName];
        if(value1 < value2){
           return -1;
        } else if(value1 > value2){
           return 1;
        } else{
           return 0;
        }
   };
}

var data = [{name:"Zachary",age:28},{name:"Nicholas",age:29}];
data.sort(createComparisonFunction("name"));
alert(data[0].name); //Nicholas
data.sort(createComparisonFunction("age"));
alert(data[0].name); //Zachary