javascript的问题,如何用for循环求数组的和??答://for循环,for in方法既可以遍历数组又可以遍历对象的可遍历属性var obj=[{a:1},{a:1},{a:1,b:[{c:1},{c:2},{c:3}]}];var obj2=[{a:1},{a:1},{a:1},{b:[{c:1},{c:2},{c:3}]}];var sum=0;var sumArr = function(arr){ for(var i in arr){ if(...
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:按照你的要求,求满足多个条件的相同属性的对象之和的Javascript程序如下 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...