Difference between revisions of "macOS NSString Regular Expressions"
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+ | === Output === | ||
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+ | 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Search string: I have 43 bags of 60 marbles. | ||
+ | 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Pattern string: \d+ | ||
+ | 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Range 1: {7, 2} | ||
+ | 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Location: 7 | ||
+ | 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Length: 2 | ||
+ | 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Match: 43 | ||
+ | 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Range 2: {18, 2} | ||
+ | 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Location: 18 | ||
+ | 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Length: 2 | ||
+ | 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Match: 60 | ||
== Example 2 - replace matched pattern == | == Example 2 - replace matched pattern == | ||
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== See also == | == See also == |
Revision as of 03:37, 16 June 2021
│ English (en) │
This article applies to macOS only.
See also: Multiplatform Programming Guide
Note: Under construction
Example 1 - matching a pattern
Code
Program regex_ex1;
{$mode objfpc}{$H+}
{$modeswitch objectivec2}
Uses
MacOSAll, CocoaAll, SysUtils;
Var
srchStr : String;
patnStr : String;
i: NSRange;
j: NSRange;
Begin
srchStr := 'I have 43 bags of 60 marbles.';
patnStr := '\d+';
// Find first match
i := NSStr(srchStr).rangeOfString_options_range(NSStr(patnStr), (NSRegularExpressionSearch or NSCaseInsensitiveSearch), NSMakeRange(0, srchStr.Length));
// Find second match
j := NSStr(srchStr).rangeOfString_options_range(NSStr(patnStr), (NSRegularExpressionSearch or NSCaseInsensitiveSearch), NSMakeRange(i.location + i.length, srchStr.Length - (i.location + i.length)));
// Output
NSLog(NSStr('Search string: %@'), NSStr(srchStr));
NSLog(NSStr('Pattern string: %@'), NSStr(patnStr));
NSLog(NSStr('Range 1: %@'), NSStringFromRange(i));
NSLog(NSStr('Location: %d'), i.location);
NSLog(NSStr('Length: %d'), i.length);
NSLog(NSStr('Match: %@'), NSStr(srchStr).substringWithRange(i));
NSLog(NSStr('Range 2: %@'), NSStringFromRange(j));
NSLog(NSStr('Location: %d'), j.location);
NSLog(NSStr('Length: %d'), j.length);
NSLog(NSStr('Match: %@'), NSStr(srchStr).substringWithRange(j));
End.
Output
2021-06-15 21:43:49.049 regex_ex1[23182:177970] Search string: I have 43 bags of 60 marbles. 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Pattern string: \d+ 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Range 1: {7, 2} 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Location: 7 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Length: 2 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Match: 43 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Range 2: {18, 2} 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Location: 18 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Length: 2 2021-06-15 21:43:49.049 regex_ex1[23182:177970] Match: 60
Example 2 - replace matched pattern
Code
Program regex_2;
{$mode objfpc}{$H+}
{$modeswitch objectivec2}
Uses
MacOSAll, CocoaAll, SysUtils;
Var
srchStr : NSString;
patnStr : NSString;
i: NSRange;
j: NSRange;
Begin
srchStr := NSStr('I have 43 bags of 60 marbles.');
patnStr := NSStr('\d+');
// Find first match
i := srchStr.rangeOfString_options_range(patnStr, NSRegularExpressionSearch, NSMakeRange(0, srchStr.Length));
// Do replacement
srchStr := srchStr.stringByReplacingOccurrencesOfString_withString(NSStr('43'), NSStr('forty-three'));
// Find second match
j := srchStr.rangeOfString_options_range(patnStr, NSRegularExpressionSearch, NSMakeRange(i.location + i.length, srchStr.Length - (i.location + i.length)));
// Do replacement
srchStr := srchStr.stringByReplacingOccurrencesOfString_withString(NSStr('60'), NSStr('sixty'));
// Output
NSLog(NSStr('Search string: %@'), srchStr);
NSLog(NSStr('Pattern string: %@'), patnStr);
NSLog(NSStr('Range 1: %@'), NSStringFromRange(i));
NSLog(NSStr('Location: %d'), i.location);
NSLog(NSStr('Length: %d'), i.length);
NSLog(NSStr('Match: %@'), srchStr.substringWithRange(i));
NSLog(NSStr('Range 2: %@'), NSStringFromRange(j));
NSLog(NSStr('Location: %d'), j.location);
NSLog(NSStr('Length: %d'), j.length);
NSLog(NSStr('Match: %@'), srchStr.substringWithRange(j));
NSLog(NSStr('Result: %@'), srchStr);
End.
See also
- macOS NSRegularExpression.
- Regexpr - cross platform.