JS 遍历数组对象,求满足多个条件的相同属性的对象之和 (谢谢)_百度知...答:var obj = [{source: "HTML",target: "JAVASCRIPT",value: 11},{source: "HTML",target: "CSS",value: 22},{source: "HTML",target: "JAVA",value: 33},{source: "HTML",target: "JAVASCRIPT",value: 44}];var result=[];var flag=true;result.push(obj[0]);for(var i=1;i<...
js中forin如何求和?请高手看看:varHeizhu=newArray[0,1,2,3,4,5...答:[0],[1],[2],[3],[4],[5]);varsum=0;for(numinHeizhu){ alert(Heizhu[num]);sum=sum+parseInt(Heizhu[num]);//求和 } alert(sum);这样写。首先你的数组定义格式有问题,newArray[i]//这种构造器是定义长度为i的数组,不能直接初始化 其次你的sum变量没有定义 ...