本文介绍了如何使用JavaScript从数组中获取总和?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
var data =[
{
name:"xyz",
meals:[
{num:3.5},{num:4 },{num:6.5},{num:3}
],
deposits:[
{date:"", amount:3000},
{date:"", amount:2400},
{date:"", amount:300},
];
},
{
name:"abc",
meals:[
{num:3.5},{num:4 },{num:6.5},{num:3}
],
deposits:[
{date:"", amount:3000},
{date:"", amount:2400},
{date:"", amount:300},
];
}
];
我想获取膳食总和。
I want to get the sum of meals & deposits for every name or object.
推荐答案使用 Array.map 和 Array.reduce
var data =[{name:"xyz",meals:[{num:3.5},{num:4 },{num:6.5},{num:3}],deposits:[{date:"", amount:3000},{date:"", amount:2400},{date:"", amount:300}]},{name:"abc",meals:[{num:3.5},{num:4 },{num:6.5},{num:3}],deposits:[{date:"", amount:3000},{date:"", amount:2400},{date:"", amount:300}]}]; let result = data.map(({name, meals, deposits}) => ({name, meals : meals.reduce((a,c) => a + c.num, 0), deposits : deposits.reduce((a,c) => a + c.amount, 0)})); console.log(result);
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如何使用JavaScript从数组中获取总和?
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