javascript - check my solution without the sort to get the error on the fourth test.

I had to sort my returning array because the test was not happy with [2, 1] instead of [1, 2]

Is there a sample test case? My code failed the sample test case with unknown error but passed the actual tests. Really strange behaviour.

import re
def strip_url_params(url, params_to_strip = []):
    split = url.split('?')
    if len(split) == 1:
        return url
    param_string = split[1]
    parameters = [x.split('=') for x in param_string.split('&')]
    test = set(params_to_strip)
    trim_url = lambda param, val: re.sub(r'&%s=%s' % (param, val), '', url)
    for x in parameters:
        if x[0] in test:
            url = trim_url(x[0], x[1])
        test.add(x[0])
    return url

I had a brainfart while doing this excercise and instead of doing division I did a while loop over k checking each one if it matches. It would be good if one of the test k's would be so big that such approach would not get pass a test :)