@extra-entries/flat-map v2.2.18

Flattens nested entries, using map function. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

Alternatives: flat, flatMap.

This is part of package extra-entries.

entries.flatMap(x, [fm], [ft]);
// x:  nested entries
// fm: map function (v, k, x)
// ft: test function (v, k, x)

const entries = require("extra-entries");

var x = [
  ["ab", [["a", 1], ["b", 2]]],
  ["cde", [["c", 3], ["de", [["d", 4], ["e", [["e", 5]]]]]]]
];
[...entries.flatMap(x)];
// [ [ "a", 1 ], [ "b", 2 ], [ "c", 3 ], [ "de", [ [Array], [Array] ] ] ]

[...entries.flatMap(x, v => entries.flat(v, 1))];
// [
//   [ "a", 1 ],
//   [ "b", 2 ],
//   [ "c", 3 ],
//   [ "d", 4 ],
//   [ "e", [ [Array] ] ]
// ]

[...entries.flatMap(x, v => entries.flat(v))];
// [ [ "a", 1 ], [ "b", 2 ], [ "c", 3 ], [ "d", 4 ], [ "e", 5 ] ]

References

• Array.prototype.flat: MDN web docs
• _.flatten: lodash
• _.flattenDeep: lodash
• _.flattenDepth: lodash
• Array.flatten: sugarjs