JavaScript Brain Teasers: Exercise Your Mind/

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Discussion: On or Off?

Discussion: On or Off?

Execute the code to understand the output and gain insights into using an object as a compact alternative to if…else statements for mapping values.

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Verifying the output

Now, it’s time to execute the code and observe the output.

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Javascript (babel-node-es2024)
let response = "on",
state = {on: 1, off: 0}[response]
console.log(state);

The trusty if…else

Suppose we have a light switch that can be turned on or off. We receive a ...