And also Unicode property search becomes available, we’ll get to it next. With such flag, a regexp handles 4-byte characters correctly. Unlike strings, regular expressions have flag u that fixes such problems. We’ll see that a bit later, in the article Sets and ranges. And, as it happens with strings, that may lead to odd results. In other words every other description except the one that is assigned its own category. This is a typical operation, for searching text that has paired delimiters. THis all works fine, however for one account the description matches the regular expression than it assigns a certain category, we then need to say if it does not match the previous description then assign a different category. Specifically, you want to match followed by any number of non- chars, followed by IJ. This is a typical operation, for searching text that has paired delimiters. The problem is not about using non-greedy matching. That’s incorrect, because they must be considered only together (so-called “surrogate pair”, you can read about them in the article Strings).īy default, regular expressions also treat 4-byte “long characters” as a pair of 2-byte ones. The problem is not about using non-greedy matching. ![]() …But we can see that there’s only one, right? The point is that length treats 4 bytes as two 2-byte characters.
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