How to use sort () to realize data de-duplication in JavaScript

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Using sort ()

Function unique (arr) {if (! Array.isArray (arr)) {console.log ('type errorships') Return;} arr = arr.sort () var arrry= [arr [0]]; for (var I = 1; I < arr.length; iTunes +) {if (arr [I]! = = ARR [I-1]) {arrry.push (ARR [I]);} return arrry } var arr = [1 unique (arr)) / / [0,1,15, "NaN", NaN, NaN, {… }, {... }, "a", false, null, true, "true", undefined] / / NaN, {} not deduplicated

Use the sort () sorting method, and then traverse and compare the adjacent elements according to the sorted results.

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