// 有行合并头不建议使用该方法
getYsXjSum() {
var tableList = this.tableList;
let res= [];
let len = tableList.length-1
//每4行再推入一行
for(let i=0;i<len;i=i+4){
if(i+4<len){
res.push(tableList.slice(i,i+4));
}else{
res.push(tableList.slice(i));
}
}
//推入后打印效果
console.log('the old array is',res);
// 每小列合计
res.forEach( (item)=>{
let total= {}
for (let key of Object.keys(item[0])) {
//total[key] = item.reduce((Sum, ele) => {
//console.log('ele----------',ele, 'key-------------',ele[key])
//return Sum + ele[key]
total[key] = item.reduce((Sum, ele) =>{
console.log('ele----------',ele, 'key-------------',ele[key])
// parseFloat(ele[key]) !== NaN
let num = 0
if (!isNaN(parseFloat(ele[key]))) {num = parseFloat(ele[key])}
return Sum + num
});
// });
// total[key] = item.reduce((Sum, ele) => (Sum +(ele[key] || 0)), 0)
}
// item.push(total)
// })
let result = [].concat(...res);
this.tableList=result
console.log('result:',result)
})
}
简写不为对象：
total[key]
= item.reduce((Sum, ele) => {
let num = 0
if (parserFloat(ele[key]) !== NaN) {num =parserFloat(ele[key])}
return Sum + num
}, 0);
