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ology/undef.js

Last active May 3, 2023 17:06
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Assigning to an undefined key in node? Crazy!
Raw
undef.js
const foo = { x: 123, y: 667 };
console.log(foo['z']);
foo[foo['z']] = 'HELLO?';
console.log(foo);
/**
* output:
* undefined
* { x: 123, y: 667, undefined: 'HELLO?' }
**/
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