添加对象数组中包含的值
添加对象数组中包含的值
提问于 2016-07-28 18:59:22
如何将对象中的所有值相加？
例如，amoutpay": ["4222","1000"]会给我5222
这是我的对象：
{
"amoutpay": [ "4222", "1000" ],
"amtpending": [ "778", "4000" ],
"totalcost": [ "5000", "5000" ],
"coursename": [ "Office Automation", "ajaba" ]
}我想要的是将这些值添加到变量中。我会使用拆分吗？
var a =
var b =
var c =Stack Overflow用户
回答已采纳
发布于 2016-07-28 19:13:46
您可以使用Array.prototype.reduce()，如下所示：
var obj = {
"amoutpay": [ "4222", "1000" ],
"amtpending": [ "778", "4000" ],
"totalcost": [ "5000", "5000" ],
"coursename": [ "Office Automation", "ajaba" ]
},
a = obj.amoutpay.reduce(function(prevVal, curVal, curInd) {
return +prevVal + +curVal;
}),
b = obj.amtpending.reduce(function(prevVal, curVal, curInd) {
return +prevVal + +curVal;
}),
c = obj.totalcost.reduce(function(prevVal, curVal, curInd) {
return +prevVal + +curVal;
});
console.log( a, b, c );
或者你可以更进一步，定义你自己的数组方法，例如Array.prototype.sum()
var obj = {
"amoutpay": [ "4222", "1000" ],
"amtpending": [ "778", "4000" ],
"totalcost": [ "5000", "5000" ],
"coursename": [ "Office Automation", "ajaba" ]
};
Array.prototype.sum = function() {
return this.reduce(function( prv, cur, ind ) {
return +prv + +cur;
});
};
var a = obj.amoutpay.sum(),
b = obj.amtpending.sum(),
c = obj.totalcost.sum();
console.log( a, b, c );
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/38634413
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