Из такого массива:
const arr = [
[{id: 1, value: "item 1"}, {id: 2, value: "item 3"}, {id: 3, value: "item 3"}, {id: 4, value: "item 4"}],
[{id: 1, value: "item 1"}, {id: 2, value: "item 2"}, {id: 3, value: "-"}, {id: 4, value: "-"}],
[{id: 1, value: "-"}, {id: 2, value: "-"}, {id: 3, value: "-"}, {id: 4, value: "-"}],
[{id: 1, value: "item 1"}, {id: 2, value: "item 3"}, {id: 3, value: "item 3"}, {id: 4, value: "-"}],
[{id: 1, value: "item 1"}, {id: 2, value: "item 3"}, {id: 3, value: "item 3"}, {id: 4, value: "item 10"}],
];
Необходимо получить такой:
const arrM = [
[{id: 1, value: "item 1"}, {id: 2, value: "item 3"}, {id: 3, value: "item 3"}, {id: 4, value: "item 4"}],
[{id: 1, value: "item 1"}, {id: 2, value: "item 3"}, {id: 3, value: "item 3"}, {id: 4, value: "item 10"}],
];
Т.е., оставить те элементы, в которых нет value: "-".