Symbol.iterator
is defined and, if so, use Array.prototype.entries()
to get an iterator for the given iterable.Array.from()
to convert the result to an array of key-value pair arrays.Symbol.iterator
is not defined for obj
, use Object.entries()
instead.const toPairs = obj => obj[Symbol.iterator] instanceof Function && obj.entries instanceof Function ? Array.from(obj.entries()) : Object.entries(obj);
toPairs({ a: 1, b: 2 }); // [['a', 1], ['b', 2]] toPairs([2, 4, 8]); // [[0, 2], [1, 4], [2, 8]] toPairs('shy'); // [['0', 's'], ['1', 'h'], ['2', 'y']] toPairs(new Set(['a', 'b', 'c', 'a'])); // [['a', 'a'], ['b', 'b'], ['c', 'c']]
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