Learn JavaScript Episode #20: Exercise Solution

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Hopefully everyone managed to solve the previous exercise. If not, it's okay. If you did, great job! It probably took you multiple times unless you come from a programming background. This is a fairly simply problem, and so if you want see my take on it keep watching. I'm going to create a function first to compute this, and we're going to use a for loop to find the missing number in the array.

[fahadh]

I used the solution code provided, but the result is always wrong.

function missingno(numbers){
var missing = -1;

for (var i = 0; i <= numbers.length; i++){
if(numbers.indexOf(i) === -1){
missing = i;
}
}

return missing;
}

var numbers = [15, 1, 2, 10, 3, 14, 10, 8];

[DavidLarew]

what if the interviewer says to find the missing numbers in an array //Input: [9, 6, 2, 3, 5, 7, 0, 1] //Output:4, 8 ? while loop ? tia David

[singhkumardev]

how about if array length is like in that case it looped like 1 lack times so this is not good solution. how can be optimise it

[greatnile]

nice tutorial.

I would say (i <= numbers.length - 1) adds more complexity than (i < numbers.length)

[bijaksetiapsaat]

thanks man, very help :)..*new subscribe;)