第 11 题：将数组扁平化并去除其中重复数据，最终得到一个升序且不重复的数组
Author: zpzxgcrCreated Feb 12, 2019Updated Jul 30, 2025
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`Array.from(new Set(arr.flat(Infinity))).sort((a,b)=>{ return a-b})`
Source: Advanced-Frontend/Daily-Interview-Question
`Array.from(new Set(arr.flat(Infinity))).sort((a,b)=>{ return a-b})`
Source: Advanced-Frontend/Daily-Interview-Question