diff options
Diffstat (limited to 'youtube_dl/jsinterp.py')
| -rw-r--r-- | youtube_dl/jsinterp.py | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/youtube_dl/jsinterp.py b/youtube_dl/jsinterp.py index 949f77775..a616ad070 100644 --- a/youtube_dl/jsinterp.py +++ b/youtube_dl/jsinterp.py @@ -925,9 +925,16 @@ class JSInterpreter(object): obj.reverse() return obj elif member == 'slice': - assertion(isinstance(obj, list), 'must be applied on a list') - assertion(len(argvals) == 1, 'takes exactly one argument') - return obj[argvals[0]:] + assertion(isinstance(obj, (list, compat_str)), 'must be applied on a list or string') + # From [1]: + # .slice() - like [:] + # .slice(n) - like [n:] (not [slice(n)] + # .slice(m, n) - like [m:n] or [slice(m, n)] + # [1] https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/slice + assertion(len(argvals) <= 2, 'takes between 0 and 2 arguments') + if len(argvals) < 2: + argvals += (None,) + return obj[slice(*argvals)] elif member == 'splice': assertion(isinstance(obj, list), 'must be applied on a list') assertion(argvals, 'takes one or more arguments') |