[SOLVED] Is there anyway to have a filesystem-like facility on ESP8266?

All these languages incorporated (over time for better or worse) some object-orientation.

Objet-Orientation was actually introduced almost 40 years ago: putting the data (state/data structure) and function (behavior/operation/function) together into one definition, to ensure for good that not the wrong operation/function can be applied on the data (invoking a function / call with the wrong data...). Smalltalk is my favorite in that respect, because the first thing in every expression is the object reference that receives a message to do something, followed by a parameter, which is also an object reference. Smalltalk is also (almost the only language) in which classes are first-class objects, and the method new returns an instance of that class.

| thisThing |
thisThing := Something new.

Smalltalk got also rid of the cluttering parentheses. In general, the code looks much more concise, but still very prosa. Class and method definitions look like this:

Something subclass: /#Object
    "Defines 'Something' as subclass of class Object. --- PS: w/o /"
  name: ''   

newWithName: aString
    "Class method that returns a new instance with name set"
  | aThing |
  aThing := Something new.
  aThing name: aString.
  ^ aThing

name
    "Instance method that returns the name"
  ^ name

name: aString
    "Instance method that sets the name"
  name := aString

Smalltalk uses parenthesis only to enforce precedence.

Regarding Object-Orientation: Take a look at the brilliant approach of using CRC-Cards - Class-Responsibility-Collaboration-Cards - to crack the OO-nut without going technical. It helps to break down a system into very suitable software components without the syntax clutter of a any language, and helps to think in encapsulated, real-world objects rather than a sequence of operations on a pile of data data types.