Pourquoi choisir le JS comme langage d'apprentissage

En français:

• 0 à 1,5: pas de s (1,5 jour)
• 2 à +: s (2 jours)
  NB: et 1,6 jour(s) ?

I do temporay workaround on an obscure project.
That i can't read the scripts because of it's bad structure.
We need to rewrite it and replace it by my complex structure for a clean solution.

PS: vi is better than emacs.