Question

I am working on regular expressions but where ever I search I am getting the code and explanation for validating the email now I have to do something like this

Contents of the file are like this(file formate may be .rtf, .txt …etc)

[Title:languageC]
[Author:Dennis Ritchie]
[Description:this book is nice to learn the C language]

form this file now I want to extract the languageC, Dennis Ritchie, this book is nice to learn the C language. I have achieved this by using NSStrings, NSScanner and NSRange but now I want to achieve this same using regularexpressions is it possible.

Answer 1

NSString *regexStr = @"\[Title:([.]+)\][ ]+\[Author:([.]+)\][ ]+\[Description:([.]+)\]";

NSError *error;
NSRegularExpression *testRegex = [NSRegularExpression regularExpressionWithPattern:regexStr options:0 error:&error];

if( testRegex == nil ) NSLog( @"Error making regex: %@", error );

NSTextCheckingResult *result = [testRegex firstMatchInString:test options:0 range:NSMakeRange(0, [test length])];

NSRange range = [result rangeAtIndex:1]; // This will give you Title,