NSArray+DespoofStrings.m

#import "NSString+SSYExtraUtils.h"

@implementation NSArray (DespoofStrings)

- (NSArray*)replaceOccurrencesOfString:(NSString*)target
							withString:(NSString*)replacement {
    NSArray* despoofedArray = nil ;

    if (target && replacement) {
        //  This is written to be efficient, assuming patches will be rare.
	
        // If any spoofs are found, patches will be a dictionary with
        //   key   = index of string containing one or more target strings
        //   value = string with spoofs replaced by underscore
        NSMutableDictionary* patches = nil ;
        NSInteger index = 0 ;
        for (NSString* string in self) {
            if (([string containsString:target])) {
                NSMutableString* newTag = [string mutableCopy] ;
                [newTag replaceOccurrencesOfString:target
                                        withString:replacement] ;
                if (!patches) {
                    patches = [[NSMutableDictionary alloc] init] ;
                }
                [patches setObject:newTag forKey:[NSNumber numberWithInteger:index]] ;
                [newTag release] ;
            }
            index++ ;
        }
        
        if (patches) {
            NSMutableArray* newArray = [self mutableCopy] ;
            for (NSNumber* oIndex in patches) {
                [newArray replaceObjectAtIndex:[oIndex integerValue]
                                    withObject:[patches objectForKey:oIndex]] ;
            }
            [patches release] ;
            
            despoofedArray = [NSArray arrayWithArray:newArray] ;
            [newArray release] ;
        }
    }
    
	return despoofedArray ;
}

@end