swap - nodef/extra-entries GitHub Wiki
Exchange two values.
function swap(x, k, l)
// x: entries
// k: a key
// l: another key
const entries = require('extra-entries');
var x = ["a", 1], ["b", 2], ["c", 3], ["d", 4](/nodef/extra-entries/wiki/"a",-1],-["b",-2],-["c",-3],-["d",-4);
[...entries.swap(x, "a", "b")];
// → [ [ "a", 2 ], [ "b", 1 ], [ "c", 3 ], [ "d", 4 ] ]
[...entries.swap(x, "a", "d")];
// → [ [ "a", 4 ], [ "b", 2 ], [ "c", 3 ], [ "d", 1 ] ]