let arr = [51,68,98,78];
let result = arr.splice(1,1);//[68]
let arr2 = [51,68,98,78];
let result2 = arr2.splice(1,2);//[98,78]
let arr = [51,68,98,78];
let result = arr.splice(1,1);//[68]
let arr2 = [51,68,98,78];
let result2 = arr2.splice(1,2);//[98,78]
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