removeStreetNumber

gistfile1.m

//removes the last word number in an expression
-(NSString *)removeStreetNumber:(NSString *)string{
    string = [string stringByTrimmingCharactersInSet:
              [NSCharacterSet whitespaceAndNewlineCharacterSet]];
    
    // /s+:whitspace atleast one time, [0-9]*:as many time of numbers as you wish, $:the end of expression
    NSRange range = [string rangeOfString:@"\\s+[0-9]*$" options:NSRegularExpressionSearch];
    
    if (range.length>0) {
        return [string stringByReplacingCharactersInRange:range withString:@""];
    }
    return string;
}

//passed tests
- (void)testExample
{
    STAssertEqualObjects([self removeStreetNumber:@"123 456"],@"123", @"");
    STAssertEqualObjects([self removeStreetNumber:@" 123 456 "],@"123", @"");
    STAssertEqualObjects([self removeStreetNumber:@"123  456"],@"123", @"");
    STAssertEqualObjects([self removeStreetNumber:@"a123 456"],@"a123", @"");
    STAssertEqualObjects([self removeStreetNumber:@"123 "],@"123", @"");
    STAssertEqualObjects([self removeStreetNumber:@" 123 "],@"123", @"");
    STAssertEqualObjects([self removeStreetNumber:@"1a23 4a56"],@"1a23 4a56", @"");
    STAssertEqualObjects([self removeStreetNumber:@" aaa 4aa56"],@"aaa 4aa56", @"");
    STAssertEqualObjects([self removeStreetNumber:@"12a3 456a"],@"12a3 456a", @"");
    STAssertEqualObjects([self removeStreetNumber:@"  123      56 "],@"123", @"");
    STAssertEqualObjects([self removeStreetNumber:@"123   456"],@"123", @"");
    STAssertEqualObjects([self removeStreetNumber:@"12aDF3 4asd56adF"],@"12aDF3 4asd56adF", @"");
    STAssertEqualObjects([self removeStreetNumber:@"123 Asd 456"],@"123 Asd", @"");
    STAssertEqualObjects([self removeStreetNumber:@"מנחם בגין 84"],@"מנחם בגין", @"");
    STAssertEqualObjects([self removeStreetNumber:@"מנחם בגין"],@"מנחם בגין", @"");
    STAssertEqualObjects([self removeStreetNumber:@" מנחם בגין"],@"מנחם בגין", @"");
    STAssertEqualObjects([self removeStreetNumber:@"    מנחם    בגין   "],@"מנחם    בגין", @"");
    STAssertEqualObjects([self removeStreetNumber:@" 23   מנחם  23  בגין 23  "],@"23   מנחם  23  בגין", @"");    
    STAssertEqualObjects([self removeStreetNumber:@"רחוב 160 16"],@"רחוב 160", @"");
}