Skystar
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Skystar
let a = [1,2,3, [1,2,3, [1,2,3]]] // 变成 let a = [1,2,3,1,2,3,1,2,3] // 具体实现 function flat(arr = [], result = []) { arr.forEach(v => { if(Array.isArray(v)) { result = result.concat(flat(v,...