Decodes a given RFC4648 base64 encoded string

CREDIT: https://gist.github.com/enepomnyaschih/72c423f727d395eeaa09697058238727 Encodes a given Uint8Array, ArrayBuffer or string into RFC4648 base64 representation

Concatenate multiple binary arrays and return new one.

Copy a file or directory. The directory can have contents. Like cp -r. Requires the --allow-read and --allow-write flag.

Test whether or not the given path exists by checking with the file system

Test whether or not the given path exists by checking with the file system

Read strings line-by-line from a Reader.

Converts and format a variable number of args as is specified by format. sprintf returns the formatted string.