first duplicate javascript
function firstDuplicate(a) {
let data = [];
for (dup of a) {
if (data[dup]) {
return dup
} else {
data[dup] = dup
}
}
return -1
}first duplicate javascript
function firstDuplicate(a) {
let data = [];
for (dup of a) {
if (data[dup]) {
return dup
} else {
data[dup] = dup
}
}
return -1
}function that duplicates data in array js
function doubleValues(array) {
var newArray = [];
array.forEach(function (el) { newArray.push(el, el); });
return newArray;
}
console.log(doubleValues([1,2,3]));Copyright © 2021 Codeinu
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