[英]How to delete empty objects from an Array in javascript?
I am getting array like below.我得到如下数组。
[{},
{},
{},
{ label: '2015', showLabels: '1,' },
{},
{},
{},
{ label: ‘2017’, showLabels: '1,' }]
but, I would like to delete empty indexes.但是,我想删除空索引。
I have tried following to delete.我试过以下删除。 But, Not working as expected.
但是,没有按预期工作。
const filteredFinalYearArr = yearArray.filter(function (el) {
return el != null;
});
Note: This is dynamic data注意:这是动态数据
Any suggestions?有什么建议么?
See this article about best ways to check if an Object is empty.请参阅这篇关于检查对象是否为空的最佳方法的文章。
const years = [ {}, {}, {}, { label: '2015', showLabels: '1,' }, {}, {}, {}, { label: '2017', showLabels: '1,' } ] const hasValues = obj => { for(var key in obj) { if(obj.hasOwnProperty(key)) return true } return false } const filteredYears = years.filter(y => hasValues(y)) console.log(filteredYears)
Another way is to use reduce to build the array.另一种方法是使用reduce来构建数组。
const yearArray = [{},{},{},{label:'2015',showLabels:'1,'},{},{},{},{label:'2017',showLabels:'1,'}] const filteredFinalYearArr = yearArray.reduce((o, i) => {Object.keys(i).length > 0 && o.push(i); return o}, []) console.log(filteredFinalYearArr)
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