uint8arrays

import { alloc, allocUnsafe } from 'uint8arrays/alloc'; import { concat } from 'uint8arrays/concat'; import { fromString } from 'uint8arrays/from-string'; import { toString } from 'uint8arrays/to-string'; import { equals } from 'uint8arrays/equals'; // Allocate a zero-filled Uint8Array const bufferA: Uint8Array = alloc(10); console.log('Allocated (zero-filled):', bufferA); // Allocate an uninitialized Uint8Array (use with caution!) const bufferUnsafe: Uint8Array = allocUnsafe(5); console.log('Allocated (potentially uninitialized):', bufferUnsafe); bufferUnsafe.fill(0xFF); // Always initialize unsafe buffers immediately console.log('Unsafe buffer after fill:', bufferUnsafe); // Convert a string to Uint8Array using UTF-8 encoding const helloBytes: Uint8Array = fromString('Hello', 'utf8'); console.log('"Hello" as UTF-8 bytes:', helloBytes); // Convert a string to Uint8Array using base64 encoding const base64Input = 'SGVsbG8gV29ybGQ='; // 'Hello World' in base64 const helloWorldBytes: Uint8Array = fromString(base64Input, 'base64'); console.log(`"${base64Input}" as base64 bytes:`, helloWorldBytes); // Concatenate multiple Uint8Arrays const spaceBytes: Uint8Array = fromString(' ', 'utf8'); const worldBytes: Uint8Array = fromString('World', 'utf8'); const combinedBytes: Uint8Array = concat([helloBytes, spaceBytes, worldBytes]); console.log('Concatenated bytes:', combinedBytes); // Convert Uint8Array back to string const decodedString: string = toString(combinedBytes, 'utf8'); console.log('Decoded string:', decodedString); // Expected: 'Hello World' // Compare two Uint8Arrays for equality const sameHelloBytes: Uint8Array = fromString('Hello', 'utf8'); const areEqual = equals(helloBytes, sameHelloBytes); const areNotEqual = equals(helloBytes, worldBytes); console.log('Are "Hello" and "Hello" equal?', areEqual); // Expected: true console.log('Are "Hello" and "World" equal?', areNotEqual); // Expected: false