function unique(arr) { var arr1 = []; for (i = 0; i < arr.length; i++) { if (arr1.indexOf(arr[i]) == -1) { arr1.push(arr[i]); } } return arr1; } var demo = unique(['q','q','e','d','cv']); console.log(demo);
好好学习，天天向上
function unique(arr) { var arr1 = []; for (i = 0; i < arr.length; i++) { if (arr1.indexOf(arr[i]) == -1) { arr1.push(arr[i]); } } return arr1; } var demo = unique(['q','q','e','d','cv']); console.log(demo);
好好学习，天天向上
