this.SoftwareList = [{'name':'1',index:1},{'name':'2'},{'name':'1'}]
find只查出第一个符合条件的结果直接返回了一个对象
const arr1 = this.SoftwareList.find(t => t.index== num)
console.log(arr2 ); { name: '1', index: 1 }
filter返回全部结果返回了一个数组
const arr2 = this.SoftwareList.filter(t => t.index== num')
console.log(arr2 ); [ { name: '1', index: 1 }, { name: '2' }, { name: '1' } ]