javascript / intermediate
Snippet
Streaming and Visualizing Binary Datasets Using Reactive Uint8Array Slices
Handling high-frequency binary data such as audio streams or sensor telemetry requires typed array views over contiguous memory buffers. By storing the underlying ArrayBuffer in a reactive reference and tracking byte offsets, components can compute efficient typed subarrays (Uint8Array) without copying massive data structures on every write cycle.
snippet.js
javascript
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import { ref, computed } from 'vue';export function useBinaryStream(bufferCapacity = 256) {const rawBuffer = ref(new ArrayBuffer(bufferCapacity));const byteLength = ref(0);const uint8View = computed(() => new Uint8Array(rawBuffer.value, 0, byteLength.value));function appendChunk(chunk: Uint8Array): void {const available = bufferCapacity - byteLength.value;const copyLength = Math.min(available, chunk.byteLength);const targetView = new Uint8Array(rawBuffer.value);targetView.set(chunk.subarray(0, copyLength), byteLength.value);byteLength.value += copyLength;}function reset(): void {new Uint8Array(rawBuffer.value).fill(0);byteLength.value = 0;}return { uint8View, byteLength, appendChunk, reset };}
vue
Breakdown
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const rawBuffer = ref(new ArrayBuffer(bufferCapacity));
Allocates a fixed-size raw binary memory buffer stored within a Vue reactive reference.
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const uint8View = computed(() => new Uint8Array(rawBuffer.value, 0, byteLength.value));
Computes a subarray typed view reflecting the current valid byte span without copying memory.
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targetView.set(chunk.subarray(0, copyLength), byteLength.value);
Copies incoming typed array slice bytes into the target buffer at the current byte offset index.
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new Uint8Array(rawBuffer.value).fill(0);
Zeroes out underlying memory bytes using typed array fill during stream reset operations.