Lab

How map, filter and reduce Work

medium
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Step Explanation

Understand what is happening first

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Execution Visualizer

Watch memory, stack, queues, and output

Execution Visualizer

live
numbers is stored in memory. The original array will be read by map, filter, and reduce.

Call Stack

1 frame
TOP ↑
▲global()
frame 0
↓ BOTTOM
Global Context

Memory

1 variable

Heap Memory

numbersarr→ refnew
"[1, 2, 3, 4]"
Console Output

awaiting output...

varfnobjarrclosure

Code Preview

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Code

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