keys - nodef/extra-entries GitHub Wiki
List all keys.
function keys(x)
// x: entries
const entries = require('extra-entries');
var x = ["a", 1], ["b", 2], ["c", 3](/nodef/extra-entries/wiki/"a",-1],-["b",-2],-["c",-3);
[...entries.keys(x)];
// → [ "a", "b", "c" ]