Javascript convert multidimentional array to indexes
Question
My script working just fine but I don't know why there is an inner voice inside my head that tells me that there must be an 'Inside the box' solution instead of writing a function or a much simpler way to get what I want.
All I want is to get the array indexes (not keys) instead of the values.
Here is my simple code:
<!DOCTYPE HTML>
<html>
<head>
<meta charset=utf-8>
<title> </title>
<style></style>
</head>
<body>
<script>
function arrayIndexes(arrConvert)
{
var newArr=[];
for(y in arrConvert)
{
newArr[y]=[];
for(x in arrConvert[y])
{
newArr[y][x]=parseInt(x);
}
}
return newArr;
}
var menu=
[
['Spaghetti','Pizza','Lazanya'],
['Vinaigrette','Mushroom','Ketchup'],
['Bon Appétit'],
['Steve Vai','Joe Satriani','Hezi Gangina','Nuno Bettencourt']
];
console.table(arrayIndexes(menu));
</script>
</body>
Is there any magic trick to replace the function with 'inTheBox' javascript solution or some other smoother way? I want to make it as clean as possible.
2 answers
solution1
3 ACCPTED 2020-11-01 07:47:07
You can use array map method, spread syntax and keys method to do your job. Traverse the array of arrays and get all the indexes and map it.
const menu = [ ['Spaghetti', 'Pizza', 'Lazanya'], ['Vinaigrette', 'Mushroom', 'Ketchup'], ['Bon Appétit'], ['Steve Vai', 'Joe Satriani', 'Hezi Gangina', 'Nuno Bettencourt'], ]; const arrayIndexes = (arrConvert) => arrConvert.map((x) => [...x.keys()]); console.log(arrayIndexes(menu));
solution2
3 2020-11-01 07:47:28
const menu = [ ["Spaghetti", "Pizza", "Lazanya"], ["Vinaigrette", "Mushroom", "Ketchup"], ["Bon Appétit"], ["Steve Vai", "Joe Satriani", "Hezi Gangina", "Nuno Bettencourt"], ]; const sol = menu.map(arr => [arr.map((_, i) => i)]).flat(); //console.table(sol); console.log(sol);
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.