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var arr = [7,8,6,1,1,2,3,4,4,5,6,7,8 ];
var newArr = Array.from(new Set(arr));
console.log(newArr.sort()) 排序
var arr = [7,8,6,1,1,2,3,4,4,5,6,7,8 ];
var newArr = Array.from(new Set(arr));
console.log(newArr.sort()) 排序