@extra-map/remove-path-update v2.2.15

Deletes value at path in a nested map. :package: :smiley_cat: :running: :vhs: :moon: :scroll: :newspaper: :blue_book:

Alternatives: remove, remove$, removePath$. Similar: hasPath, getPath, setPath$, removePath$. Similar: get, set, remove.

This is part of package extra-map.

map.removePath$(x, p);
// x: a nested map (updated)
// p: path
// → x

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

var x = new Map([["a", 2], ["b", 4], ["c", 6]]);
var y = new Map([["x", x], ["e", 10], ["f", 12]]);
map.removePath$(y, ["e"]);
// Map(2) { "x" => Map(3) { "a" => 2, "b" => 4, "c" => 6 }, "f" => 12 }

y;
// Map(2) { "x" => Map(3) { "a" => 2, "b" => 4, "c" => 6 }, "f" => 12 }

map.removePath$(y, ["x", "b"]);
// Map(2) { "x" => Map(2) { "a" => 2, "c" => 6 }, "f" => 12 }

map.removePath$(y, ["x", "b", "c"]);
// Map(2) { "x" => Map(2) { "a" => 2, "c" => 6 }, "f" => 12 } (no effect)

References

• List-Extra.updateAt: elm
• List.set: Java