Is it a bug? Why deleting an argument in an array gets null?

Bugs
1

https://codecombat.com/play/level/reindeer-tender?

On this level, I cleared out all the other code lines and did this below. Please take a look the lines and my #s.

friends = hero.findFriends()

hero.say(friends[3])
#says 'comet'
hero.say(friends[4])
#says 'vixen'
hero.say(len(friends))
#says 5

del friends[3]

hero.say(len(friends))
#should says 4... but still 5

hero.say(friends[3])
#should says 'vixen'... but no.
#Line 15: ArgumentError: say's argument message should have type string, but got null. Say what?

So basically it’s like [1, 2, 3] - [2] got [1, null, 3], which should have been [1, 3] I guess.

When you delete arguments from an array, shouldn’t the array’s length get short by the number of argument you just deleted, instead of putting NULL to keep the length?

2

No, it’s not a bug, it’s CodeCombat Python, not pure python. CoCo python is JavaScript in dis guise:-). You can use many javascript features as filter, map, LoDash etc…, but I think the inverse will generally not work, as some exepected python code will act as javascript code.

py
py940×291 21.5 KB

js
js945×284 24.6 KB

1 Like
3

Thank you very much :smiley:

4

OMG! This works in CoCo:

x = ['a', 'b','c']
print(x)
x.remove('a')
print(x)
index = x.index('c')
del x[index]
print(x)

browser console output:

['a', 'b', 'c']
['b', 'c']
['b',]  # in python console it will be ['b']