javascript - 按季度计算总和

Question

我正在尝试根据季度系统获取总计。 [10,20,30,40,50,60,70,80,90] - 初始数组

我正在寻找的结果是 [60, 150, 70, 80, 90] 其中Q1 = 10+20+30 = 60 Q2 = 40+50+60 = 150 只有通过 10 月份的值，Q3 才会完成。

我对自己的逻辑感到困惑

var adata = [10,20,30,40,50,60,70,80,90];
process(adata, "Sept 2014");

function process(adata, date){
    var today = new Date(date) || new Date();
    var aQuarter = [];
	var tempQuarter = [];
    var aSum = [];
    //var quarter = Math.floor((today.getMonth() + 3)/3);
    for(var i = 0; i<= today.getMonth(); i++) {
        aQuarter.push(adata[i]);
    }
    tempQuarter = adata.slice();
    if(tempQuarter.length > 3) {
		var i = 0;
        var sum = [];
		while(i <= 2) {
			sum[i] = aQuarter.shift();
			i++;
		}
        console.log(sum);
		aQuarter.unshift(sum);
	}
    if(tempQuarter.length > 6){
		var i = 0;
        var sum = [];
		while(i+1 <= 3) {
			sum[i] = aQuarter.shift();
			i++;
		}
		aQuarter.unshift(sum);
	}
    console.log(aQuarter);
    if(tempQuarter.length > 9){
		var i = 0;
		while(i+2 <= 4) {
			sum[i] = aQuarter.shift();
			i++;
		}
	}
}

jsfiddle

Answer 1

抱歉，我稍微玩了一下 fiddle ，用这个来得到你的结果，它对你有用吗？

var adata = [10,20,30,40,50,60,70,80,90];
console.log("Sept 2014");
process(adata, "Sept 2014");

console.log("April 2014");
process(adata, "April 2014");

console.log("March 2014");
process(adata, "March 2014");

console.log("December 2014");
process(adata, "December 2014");

function process(adata, date){
    var today = new Date(date) || new Date();

    // reults array init
    var tempArray = [];
    var eachQuarterAmount = 3;
    // Limit the values to January to today as defined by the date param
    var aDataUpToPoint = adata.slice(0,today.getMonth() + 1);
    console.log(aDataUpToPoint);

    for (var i = 0; i < aDataUpToPoint.length; i+=eachQuarterAmount) {
    // increment every 3 values

        if (typeof aDataUpToPoint[i+eachQuarterAmount] != 'undefined') {
            // If there's anything after (ie if there's Oct) then total previous values up using reduce
            tempArray.push(aDataUpToPoint.slice(i,i+eachQuarterAmount).reduce(function(total, num){ return total + num },0));
        } else {
            // If the hunt for red October failed just tack on whatever remains
            for (; i < aDataUpToPoint.length; i++) {
                // uses the same loop contol variable as the parent to complete the search in both cases, picks up where it left off
                tempArray.push(aDataUpToPoint[i]);
            }
        }
    }
    console.log(tempArray);
}

编辑:减少一些神奇的数字......有点。

注意:刚刚意识到您正在使用日期参数执行某些操作...所以我的 adata.length 可能应该替换为 today.getMonth()

编辑 2:将 aData 切片以在日期范围内工作，向数据集添加 +1，并从前瞻中删除 +1。