@extra-object/key-of v1.1.8

Get first key of value in object, like Array.indexOf().

const keyOf = require('@extra-object/key-of');
// keyOf(<object>, <search value>)

keyOf({run: 'ran', jog: 'jogged'}, 'jogged');
// 'jog'
keyOf({r: 18, u: 21, n: 14}, 18);
// 'r'
keyOf({j: 10, o: 15, g: 7}, 5);
// undefined