26 lines
698 B
Dart
26 lines
698 B
Dart
class MatchingBrackets {
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bool isPaired(String input) {
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final Map<String, String> bracketPairs = {
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'}': '{',
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']': '[',
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')': '(',
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};
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final List<String> openBrackets = bracketPairs.values.toList();
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final List<String> closeBrackets = bracketPairs.keys.toList();
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final List<String> stack = [];
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for (final char in input.runes.map((rune) => String.fromCharCode(rune))) {
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if (openBrackets.contains(char)) {
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stack.add(char);
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} else if (closeBrackets.contains(char)) {
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if (stack.isEmpty || stack.last != bracketPairs[char]) {
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return false;
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}
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stack.removeLast();
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}
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}
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return stack.isEmpty;
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}
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}
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