I want to split a long string (containing digits and characters) into different substrings in Kotlin?
eg:- Buy these 2 products and get 100 off
output needed -> "Buy these ","2 ","products and get ","100 ","off"
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1This looks like a line from a CSV file. If so, it's usually better to use an existing library to parse it — not only do you not have to muck around with regexes or whatever, but the library will cope with nested quotes, escape characters, comments, locale-specific separators, and all the other variations and corner cases and complications that you haven't thought of. (For example, Apache Commons CSV is free and open-source.)gidds– gidds2021-10-10 21:12:38 +00:00Commented Oct 10, 2021 at 21:12
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I prefer to use answer by @SamBincy Baby– Bincy Baby2021-10-11 15:18:23 +00:00Commented Oct 11, 2021 at 15:18
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also the answer by @Alireza MahfouzianBincy Baby– Bincy Baby2021-10-11 15:18:50 +00:00Commented Oct 11, 2021 at 15:18
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2 Answers
Use a regular expression that will match either a group of digits, or a group of non-digit characters.
I used \d+|\D+.
\d+will match groups of digits, like2and100\D+will match any sequence of characters that doesn't contain digits- The
|indicates that the pattern should match either\d+or\D+
Use findAll to find each part of the string that matches the pattern.
val regex = Regex("""\d+|\D+""")
val input = "Buy these 2 products and get 100 off"
val result = regex.findAll(input).map { it.groupValues.first() }.toList()
The result I get is:
["Buy these ", "2", " products and get ", "100", " off"]
The spacing isn't quite the same as what you're looking for, so you could trim the results, or adjust the regex pattern.
Comments
this code also works well in this example:
val str = "Buy these 2 products and get 100 off"
val result = str.split(regex = Regex("(?<=\\D)(?=\\d)|(?<=\\d)(?=\\D)"))
