let tempData = [
{
id: 1,
title: 'a',
},
{
id: 1,
title: 'b',
},
{
id: 2,
title: 'c',
},
]
//两次循环
let resultData = []
for (let i = 0; i < tempData.length; i++) {
let repeat = false
for (let j = 0; j < resultData.length; j++) {
if (tempData[i].id === resultData[j].id) {
repeat = true
break
}
}
if (!repeat) {
resultData.push(tempData[i])
}
}
console.log(resultData)
//一次循环
let map = new Map()
tempData.forEach((item) => {
map.set(item.id, item)
})
const resultData2 = [...map.values()]
console.log(resultData2)
//一次循环
const obj = {}
const resultData3 = tempData.reduce((total, next) => {
if (!obj[next.id]) {
obj[next.id] = true
total.push(next)
}
return total
}, [])
console.log(resultData3)
