Finding longest string in array
I would do something like this
var arr = [
'first item',
'second item is longer than the third one',
'third longish item'
];
var lgth = 0;
var longest;
for (var i = 0; i < arr.length; i++) {
if (arr[i].length > lgth) {
var lgth = arr[i].length;
longest = arr[i];
}
}
console.log(longest);
Maybe not the fastest, but certainly pretty readable:
function findLongestWord(array) {
var longestWord = "";
array.forEach(function(word) {
if(word.length > longestWord.length) {
longestWord = word;
}
});
return longestWord;
}
var word = findLongestWord(["The","quick","brown", "fox", "jumped", "over", "the", "lazy", "dog"]);
console.log(word); // result is "jumped"
The array function forEach has been supported since IE9+.
A new answer to an old question: in ES6 you can do shorter:
Math.max(...(x.map(el => el.length)));
Available since Javascript 1.8/ECMAScript 5 and available in most older browsers:
var longest = arr.reduce(
function (a, b) {
return a.length > b.length ? a : b;
}
);
Otherwise, a safe alternative:
var longest = arr.sort(
function (a, b) {
return b.length - a.length;
}
)[0];