)
Replace all substrings that match from by a string computed from the
match.
Returns a new string in which the non-overlapping substrings that match
from (the ones iterated by from.allMatches(thisString)) are replaced
by the result of calling replace on the corresponding Match object.
This can be used to replace matches with new content that depends on the match, unlike replaceAll where the replacement string is always the same.
The replace function is called with the Match generated
by the pattern, and its result is used as replacement.
The function defined below converts each word in a string to simplified
'pig latin' using replaceAllMapped:
pigLatin(String words) => words.replaceAllMapped(
new RegExp(r'\b(\w*?)([aeiou]\w*)', caseSensitive: false),
(Match m) => "${m[2]}${m[1]}${m[1].isEmpty ? 'way' : 'ay'}");
pigLatin('I have a secret now!'); // 'Iway avehay away ecretsay ownay!'
Source
/**
* Replace all substrings that match [from] by a string computed from the
* match.
*
* Returns a new string in which the non-overlapping substrings that match
* [from] (the ones iterated by `from.allMatches(thisString)`) are replaced
* by the result of calling [replace] on the corresponding [Match] object.
*
* This can be used to replace matches with new content that depends on the
* match, unlike [replaceAll] where the replacement string is always the same.
*
* The [replace] function is called with the [Match] generated
* by the pattern, and its result is used as replacement.
*
* The function defined below converts each word in a string to simplified
* 'pig latin' using [replaceAllMapped]:
*
* pigLatin(String words) => words.replaceAllMapped(
* new RegExp(r'\b(\w*?)([aeiou]\w*)', caseSensitive: false),
* (Match m) => "${m[2]}${m[1]}${m[1].isEmpty ? 'way' : 'ay'}");
*
* pigLatin('I have a secret now!'); // 'Iway avehay away ecretsay ownay!'
*/
String replaceAllMapped(Pattern from, String replace(Match match));