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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 part of utilslib; | 5 part of utilslib; |
6 | 6 |
7 /** | 7 /** |
8 * General purpose string manipulation utilities. | 8 * General purpose string manipulation utilities. |
9 */ | 9 */ |
10 class StringUtils { | 10 class StringUtils { |
11 /** | 11 /** |
12 * Returns either [str], or if [str] is null, the value of [defaultStr]. | 12 * Returns either [str], or if [str] is null, the value of [defaultStr]. |
13 */ | 13 */ |
14 static String defaultString(String str, [String defaultStr='']) { | 14 static String defaultString(String str, [String defaultStr = '']) { |
15 return str == null ? defaultStr : str; | 15 return str == null ? defaultStr : str; |
16 } | 16 } |
17 | 17 |
18 /** Parse string to a double, and handle null intelligently */ | 18 /** Parse string to a double, and handle null intelligently */ |
19 static double parseDouble(String str, [double ifNull = null]) { | 19 static double parseDouble(String str, [double ifNull = null]) { |
20 return (str == null) ? ifNull : double.parse(str); | 20 return (str == null) ? ifNull : double.parse(str); |
21 } | 21 } |
22 | 22 |
23 /** Parse string to a int, and handle null intelligently */ | 23 /** Parse string to a int, and handle null intelligently */ |
24 static int parseInt(String str, [int ifNull = null]) { | 24 static int parseInt(String str, [int ifNull = null]) { |
25 return (str == null) ? ifNull : int.parse(str); | 25 return (str == null) ? ifNull : int.parse(str); |
26 } | 26 } |
27 | 27 |
28 /** Parse bool to a double, and handle null intelligently */ | 28 /** Parse bool to a double, and handle null intelligently */ |
29 // TODO(jacobr): corelib should have a boolean parsing method | 29 // TODO(jacobr): corelib should have a boolean parsing method |
30 static bool parseBool(String str, [bool ifNull = null]) { | 30 static bool parseBool(String str, [bool ifNull = null]) { |
31 assert(str == null || str == 'true' || str == 'false'); | 31 assert(str == null || str == 'true' || str == 'false'); |
32 return (str == null) ? ifNull : (str == 'true'); | 32 return (str == null) ? ifNull : (str == 'true'); |
33 } | 33 } |
34 } | 34 } |
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