flatMap function in js code example
Example: flatmap javascript
var arr = [1, 2, 3, 4];
arr.flatMap(x => [x, x * 2]);
// is equivalent to
arr.reduce((acc, x) => acc.concat([x, x * 2]), []);
// [1, 2, 2, 4, 3, 6, 4, 8]var arr = [1, 2, 3, 4];
arr.flatMap(x => [x, x * 2]);
// is equivalent to
arr.reduce((acc, x) => acc.concat([x, x * 2]), []);
// [1, 2, 2, 4, 3, 6, 4, 8]