JS Built-ins
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Atomicssubbeginner

Atomics.sub returns old value

📖 Usage Example
const i32 = new Int32Array(new SharedArrayBuffer(4))
Atomics.store(i32, 0, 10)
Atomics.sub(i32, 0, 3)  // → 10 (old value)
Atomics.load(i32, 0)   // → 7

Atomics.sub() atomically subtracts a value, returning the old value before subtraction.

Use Atomics.sub to get the old value at an index before subtracting.

💡 Hints (1)
  • • Use Atomics.sub(typedArray, index, value)