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//Google Question
//Given an array = [2,5,1,2,3,5,1,2,4]:
//It should return 2
//Given an array = [2,1,1,2,3,5,1,2,4]:
//It should return 1
//Given an array = [2,3,4,5]:
//It should return undefined
function firstRecurringCharacter(input){
rep = {};
for(let i=0;i<input.length;i++){
// console.log(rep);
if(rep[input[i]]){
return input[i];
}
else if(!rep[input[i]]){
rep[input[i]]=true;
}
}
return undefined;
}
array = [2,3,4,5,2]
// firstRecurringCharacter(array)
console.log(firstRecurringCharacter(array));
//Bonus... What if we had this:
// [2,5,5,2,3,5,1,2,4]
// return 5 because the pairs are before 2,2
JavaScript
INFO