javascript - Angular 。如何不重复相同的功能

Question

此函数有效，但如何避免为第二个变量键入相同的 for 循环并以某种方式只使用一个。尽量不要在这里重复你自己的方法。我需要使用数组吗？

JS:

var app=angular.module('xpCalc', []);
app.controller('xpCalculatorController', function($scope){
$scope.currentLevel=1;
$scope.currentXp=function(){
    var output=0;
    for (var thisLVL=1; thisLVL < $scope.currentLevel; thisLVL++) {
        output += ( Math.floor ( thisLVL + 300 * Math.pow( 2, thisLVL / 7 ) ) / 4 );
    }
    return output;
  };
  $scope.desiredLevel=1;
  $scope.desiredXp=function(){
    var output=0;
    for (var thisLVL=1; thisLVL < $scope.desiredLevel; thisLVL++) {
        output += ( Math.floor ( thisLVL + 300 * Math.pow( 2, thisLVL / 7 ) ) / 4 );
    }
    return output;
  };
});

HTML:

<h2>{{desiredXp()-currentXp()}}</h2> 

Answer 1

试试这个。

var app=angular.module('xpCalc', []);
app.controller('xpCalculatorController', function($scope){
$scope.currentLevel=1;
$scope.currentXp=InternalLoop($scope.currentLevel);
$scope.desiredLevel=1;
$scope.desiredXp=InternalLoop($scope.desiredLevel);

function InternalLoop(level){
    var output=0;
    for (var thisLVL=1; thisLVL < level; thisLVL++) {
        output += ( Math.floor ( thisLVL + 300 * Math.pow( 2, thisLVL / 7 ) ) / 4 );
    }
    return output;
  };

});