Remove Unique Array Javascript

 function uniqArray(array){

var a = [];

for(var i = 0; i < array.length; i++){

if(a.indexOf(array[i] === -1) && array[i] !== ''){

a.push(array[i]);

}

}

return a;

}

console.log(["A","B","A","C"]);

Number to Hours Javascript

 function StringChallenge(num) { 

    var hours = Math.floor(num / 60);

    var minutes = num % 60;

  return hours + ":" + minutes; 

}

console.log(StringChallenge(readline()));