Regular expression keep matched value
Simply use () to quote the value you would like to keep in the result.
String selectedText = "abcdefghi";
selectedText = selectedText.replace(/(a)(b)(c)(d)(e)(f)(g)(h)(i)/g, "$1- $2- $3- $4- $5- $6- $7");
// selectedText "a-b-c-d-e-f-g-h-i"
String selectedText = "abcdefghi";
selectedText = selectedText.replace(/(a)(b)(c)(d)(e)(f)(g)(h)(i)/g, "$1- $2- $3- $4- $5- $6- $7");
// selectedText "a-b-c-d-e-f-g-h-i"
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