Refactor JavaScript snippet for given problem statement.
var arr1 = ['a', 'b', 'c', 'd', 'e', 'f', 'g'];
var arr2 = [1, 2, 3, 4, 5, 6];
var arr3 = [11, 22, 5, 6];
var arr4 = ["tom","cat","bob"];
arr1.foreach{
// length = 7
//do something
}
arr2.foreach{
// length = 6
//do something
}
arr3.foreach{
// length = 4
//do something
}
arr4.foreach{
// length = 3
//do something
}
Below code fulfill my objective but it's checking un-necessary condition for arr4 (7 times instead of 3),
arr3 (7 times instead of 4),
arr2 (7 times instead of 6)
because it's inside max length 7 iteration.
const zip = (...arr) => Array.from(
{ length: Math.max(...arr.map(a => a.length)) },
(_, i) => arr.map(a => a[i] || null )
);
var arr1 = ['a', 'b', 'c', 'd', 'e', 'f', 'g'];
var arr2 = [1, 2, 3, 4, 5, 6];
var arr3 = [11, 22, 5, 6];
var arr4 = ["tom","cat","bob"];
var a = zip(arr1,arr2,arr3,arr4);
a.forEach(function(item, index, array) {
//console.log(index, item);
console.log("--------------------");
(item[0] === null) ? "nothing" : console.log("first array " + item[0]);
(item[1] === null) ? "nothing" : console.log("second array " + item[1]);
(item[2] === null) ? "nothing" : console.log("third array " + item[2]);
(item[3] === null) ? "nothing" : console.log("third array " + item[3]);
});
Top comments (1)
Hello ! Don't hesitate to put colors on your
codeblock
like this example for have to have a better understanding of your code π