I am trying to find a unique word in my input string with JS and have written a code. However, my code doesn't work and I don't know why. Could anyone help me please?
function findUniqueWord(index){
var show = []
var result = [...index]
for (let i = 0; i < result.length; i++) {
for (let j = i + 1; j < result.length; j++) {
if(result[i] === result[j]){
}
else{
return show.push(result[i])
}
}
}
return show
}
console.log(findUniqueWord('A2A'));If you intend to find the first unique letter in a string, you can use split for create an array of string then use reduce for sum duplicate and last part use Object.entries with indexOf for search the first letter unique. In this example i will add a case that not exist a unique letter.
function findUniqueWord(index) {
let array = index.split('');
let map = array.reduce(function(prev, cur) {
prev[cur] = (prev[cur] || 0) + 1;
return prev;
}, {});
let finalIndex = null;
for (const [key, value] of Object.entries(map)) {
if(value === 1){
let tempIndex = array.indexOf(key);
finalIndex = (finalIndex !== null && finalIndex < tempIndex) ? finalIndex : tempIndex;
}
}
return (finalIndex === null) ? 'No unique letter' : array[finalIndex];
}
console.log(findUniqueWord('Mystery'));
console.log(findUniqueWord('2A2'));
console.log(findUniqueWord('2AA'));
console.log(findUniqueWord('22AA'));This method is case-sensetive if you don't need it just use toUpperCase() to string before call split method.
Reference: