My latest assignment requires creating a function that can compress a string by representing identical consecutive characters as the character followed by its count. For instance: runLengthEncoding("aaaabbbccd"); // ==> 'a4b3c2d'
This task must be accomplished using a functional programming approach, meaning all variables must be constants and loops are prohibited.
Luckily, I have access to the Ramda library for assistance. Any suggestions on how to tackle this?
Utilize gzip and browser native APIs to compress strings:
export const compressString = async (
data: string,
type = 'gzip' as CompressionType
): Promise<ArrayBuffer> => {
const byteArray = new TextEncoder().encode(data);
const compressionStream = new CompressionStream(type);
const writer = compressionStream.writable.getWriter();
writer.write(byteArray);
writer.close();
return new Response(compressionStream.readable).arrayBuffer();
}
export const decompressString = async (
byteArray: string[],
type = 'gzip' as CompressionType
): Promise<string> => {
const decompressionStream = new DecompressionStream(type);
const writer = decompressionStream.writable.getWriter();
writer.write(byteArray);
writer.close();
const arrayBuffer = await new Response(decompressionStream.readable).arrayBuffer();
return new TextDecoder().decode(arrayBuffer);
}
For this homework question, I will provide you with two key tips that should help guide you in the right direction.
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