40 lines
1.0 KiB
Dart
40 lines
1.0 KiB
Dart
extension AssetString on String {
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String get ktIcon => "assets/$this";
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// 截断字符串并添加省略号
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String truncate(int maxLength) {
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if (length <= maxLength) return this;
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return '${substring(0, maxLength)}...';
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}
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// 首字母大写
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String capitalize() {
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if (isEmpty) return this;
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return this[0].toUpperCase() + substring(1);
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}
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// 转为 int，失败返回 null
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int? toIntOrNull() => int.tryParse(this);
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// 转为 double，失败返回 null
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double? toDoubleOrNull() => double.tryParse(this);
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// 判断是否为数字
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bool get isNumeric => double.tryParse(this) != null;
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// 去除所有空白
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String get removeAllWhitespace => replaceAll(RegExp(r'\s+'), '');
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}
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extension NullString on String? {
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bool get isNullString => this == null || (this?.isEmpty ?? false);
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// 安全截断
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String safeTruncate(int maxLength) {
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if (this == null) return '';
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return this!.truncate(maxLength);
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}
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// 安全首字母大写
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String get safeCapitalize => (this?.capitalize() ?? '');
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}
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