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"

CodePudding user response：

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, like 2 and 100
• \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.

CodePudding user response：

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)"))