JS: map and filters

  filter - exercice 1
    ✓ getPositiveNumbers

  filter - exercice 2
    ✓ keepStarks

  filter - exercice 3
    ✓ filterOnPrice (price <= 500)
    ✓ filterOnPrice (price <= 649)

  map - exercice 1
    ✓ getStringsLength

  map - exercice 2
    ✓ getFoodCategories

  map - exercice 3
    ✓ getMoviesFreshness


  7 passing (12ms)