What this snippet does
Computed keys with [] allow dynamic property names determined at runtime — useful for building objects from variables.
Expected output
100 Alice 30
Why practise typing this
Typing objects code builds muscle memory for the symbols and indentation JavaScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
More JavaScript practice
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