The default x in y syntax works for strings in python, but only checks that the sequence of unicode code points is present in the string.
That could potentially cause issues, such as:
>>> se = "\U0001F1F8\U0001F1EA"
>>> es = "\U0001F1EA\U0001F1F8"
>>> ee = "\U0001F1EA\U0001F1EA"
>>> es_ee = es + ee
>>> print(se)
🇸🇪
>>> print(es_ee)
🇪🇸🇪🇪
>>> se in es_ee
True
We should provide something like grapheme.contains(string, substring) which only should return true if the sequence of graphemes in substring is in the sequence of graphemes in string.
alvinlindstam
commented
7 years ago
The default
x in ysyntax works for strings in python, but only checks that the sequence of unicode code points is present in the string.That could potentially cause issues, such as:
We should provide something like
grapheme.contains(string, substring)which only should return true if the sequence of graphemes insubstringis in the sequence of graphemes instring.