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//
// NSDictionary+LispExtensions.m
// Moxie
//
// Created by Brian Cully on Mon Sep 13 2004.
// Copyright (c) 2004 Brian Cully. All rights reserved.
//
#import "NSDictionary+LispExtensions.h"
@implementation NSDictionary (LispExtensions)
/*
* Assoc Lists are arrays of the form ((KEY0 VALUES0) (KEY1 VALUES1) ... (KEYN VALUESN)).
* Useful for lisp, not for Cocoa where we can use NSDictionary.
*/
+ (NSMutableDictionary *)dictionaryWithAlist: (NSArray *)attrList
{
NSEnumerator *objEnum;
NSMutableDictionary *result;
NSArray *row;
result = [NSMutableDictionary dictionary];
objEnum = [attrList objectEnumerator];
while ((row = [objEnum nextObject]) != nil) {
NSArray *subarray;
NSRange valueRange;
id key;
key = [row objectAtIndex: 0];
valueRange = NSMakeRange(1, [row count] - 1);
subarray = [row subarrayWithRange: valueRange];
[result setObject: subarray forKey: key];
}
return result;
}
- (NSString *)lispForm
{
NSEnumerator *keyEnum;
NSMutableString *result;
id key;
result = [NSMutableString stringWithString: @"("];
keyEnum = [self keyEnumerator];
while ((key = [keyEnum nextObject]) != nil) {
id value;
value = [self objectForKey: key];
[result appendFormat: @"(%@ . %@)", [key lispForm], [value lispForm]];
}
[result appendString: @")"];
return result;
}
@end
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