I know how to trim all strings in an array (thanks to this article!) through the map() method
let a = [' a ', ' b ', ' c '];
let b = a.map(element => {
return element.trim();
});
console.log(b); // ['a', 'b', 'c']But I was wondering how can I trim an array of arrays?
For example let x = [[" a ", " b "], [" c ", " d "]]
Thank you!
P.S: I'm currently learning Javascript.
You can map over the nested arrays as well.
let data = [[" a ", " b "], [" c ", " d "]]
const result = data.map((d) => d.map((y) => y.trim()));
console.log(result);If you want to flatten out the result, you could use flatMap()
let data = [[" a ", " b "], [" c ", " d "]]
const result = data.flatMap((d) => d.map((y) => y.trim()));
console.log(result);In addition to the solutions already provided, if you have n levels of nested array and you want to trim the string without flattening the array, you can do it recursively as follows.
let arr = [
[" a ", " b "],
[" c ", " d ", [" e", "f "]]
]
function trimRecursively(arr) {
return arr.map(x => {
if (Array.isArray(x)) {
return trimRecursively(x);
} else {
return x.trim();
}
})
}
console.log(trimRecursively(arr));
