Size: a a a
IN
IN
IN
РК
AG
const obj = [
{
"name" : "Moscow"
},
{
"name" : "Moscow"
},
{
"name" : "London"
},
{
"name" : "London"
},
{
"name" : "Paris"
}
]AG
AG
const obj = [
{
"index" : 1,
"name" : "Moscow"
},
{
"index" : 2,
"name" : "Moscow"
},
{
"index" : 1,
"name" : "London"
},
{
"index" : 2,
"name" : "London"
},
{
"index" : 1,
"name" : "Paris"
}
]РК
И
AG
an
RY
И
И
an
obj.map((el, i) => ({...el, index: i}))РК
И
AG
obj.map((el, i) => ({...el, index: i}))an