Parsing a string with inline C

By the way, those regex bugs are now fixed (in cutting edge builds, of 2v07 when released)

I could see a new method, like require("Storage").do

Because of the way Espruino works with Storage, data in storage is actually memory-mapped. If you do a read or readArrayBuffer then you're actually accessing the data directly from flash.

As a result, you can actually do what you want right now using forEach/map/reduce/etc without any extra functions:

var s = require("Storage");
// for every element
new Uint8Array(s.readArrayBuffer("z")).forEach(print)
// count newlines
new Uint8Array(s.readArrayBuffer("z")).reduce((a,b)=>a+(b==10),0)

If you want to iterate over just part of the data, you can use the Uint8Array constructor to choose an offset and length :)