1、常用的去重方法
let arry = [1, 2, 3, 4, 7, 4, 6, 11, 7, 1, 3, 2, 4];
function duplicateRemoval(data) {
let obj = {};
let newArry = [];
for (let i = 0; i < data.length; i++) {
if (!obj[data[i]]) {
obj[data[i]] = true;
newArry.push(data[i])
}
}
return newArry
}
2、和1区别不大
function duplicateremoval(data) {
let obj = {};
let newArry = [];
data.forEach(element => {
if (!obj[element]) {
obj[element] = true;
newArry.push(element)
}
});
return newArry
}
3, es6 的数组去重
function duplicateRemovalEs(params) {
return Array.from(new Set(params))
}
