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I need to write a extended version of the StringUtils.commaDelimitedListToStringArray function which gets an additional parameter: the escape char.
so calling my:
commaDelimitedListToStringArray("test,test\\,test\\,test,test", "\\") should return:
["test", "test,test,test", "test"]
My current attempt is to use String.split() to split the String using regular expressions:
String[] array = str.split("[^\\\\],"); But the returned array is:
["tes", "test\,test\,tes", "test"] Any ideas?
344
To split a string with comma, use the split() method in Java. str. split("[,]", 0); The following is the complete example.
split() is based on regex expression, a special attention is needed with some characters which have a special meaning in a regex expression. The special character needs to be escaped with a "\" but since "\" is also a special character in Java, you need to escape it again with another "\" !
sub() function to erase commas from the python string. The function re. sub() is used to swap the substring. Also, it will replace any match with the other parameter, in this case, the null string, eliminating all commas from the string.
The regular expression
[^\\], means "match a character which is not a backslash followed by a comma" - this is why patterns such as t, are matching, because t is a character which is not a backslash.
I think you need to use some sort of negative lookbehind, to capture a , which is not preceded by a \ without capturing the preceding character, something like
(?<!\\), (BTW, note that I have purposefully not doubly-escaped the backslashes to make this more readable)
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