Function keys

Returns value's keys.

Since

1.0.0

Example

keys({ a: 0, b: 1, c: 2 });
// => ["a", "b", "c"]
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Example

function Foo() {
  this.a = 1
  this.b = 2
}

Foo.prototype.c = 3

keys(new Foo)
// => ["a", "b"] (iteration order is not guaranteed)
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Example

keys("hi")
// => ["0", "1"]
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