js數組處理方法

1,數組去重數組 { let arr = [1,2,3,5,6,1,2,3] let temp = arr.reduce((a,v) => { !a.includes(v) && a.push(v) return a },[]) console.log(temp) } // [1, 2, 3, 5, 6] let arr = [1,

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