demo:
let devices = [
{
id:1,name:'a'},
{
id:2,name:'b'},
]
let newDevices = devices.filter(item => {
return item.id===1
})
console.log(newDevices) // [{
id:1,name:'a'}]
let newDevices2 = devices.filter(item => {
return item.id===3
})
console.log(newDevices) //[]
let devices = [
{
id:1,name:'a'},
{
id:2,name:'b'},
]
let newDevices = devices.find(item => {
return item.id===1
})
console.log(newDevices) // {
id:1,name:'a'}
let newDevices2 = devices.find(item => {
return item.id===3
})
console.log(newDevices) //undefined