Sample: Nest of 'WebScriptObject ( Javascript associative array ) to NSDictionary' or 'WebScriptObject ( Javascript array ) to NSArray ) '

SampleAppDelegate.h

#import <Cocoa/Cocoa.h>
#import <WebKit/WebKit.h>
@interface SampleAppDelegate : NSObject <NSApplicationDelegate> {
    NSWindow *window;
}

@property (assign) IBOutlet NSWindow *window;

+ (id)structueWithWebScriptObject:(WebScriptObject *)obj
                  webScriptObject:(WebScriptObject *)scriptObj;

@end

SampleAppDelegate.m

#import "SampleAppDelegate.h"
@implementation SampleAppDelegate
@synthesize window;
+ (NSDictionary *)dictionaryWithWebScriptObject:(WebScriptObject *)obj
                                webScriptObject:(WebScriptObject *)scriptObj
{
    NSMutableDictionary *ret= [NSMutableDictionary dictionary];
    id keys= [scriptObj callWebScriptMethod:@"_f0_"
                              withArguments:[NSArray arrayWithObjects:obj, nil]];
    NSArray *keyAry= [SampleAppDelegate structueWithWebScriptObject:keys
                                                    webScriptObject:scriptObj];
    unsigned i;
    for(i= 0; i<[keyAry count]; i++) {
        NSString *key= [keyAry objectAtIndex:i]; 
        id val= [obj valueForKey:key];
        if ([val isMemberOfClass:[WebScriptObject class]]) {
            val= [SampleAppDelegate structueWithWebScriptObject:val
                                                webScriptObject:scriptObj];
        }
        [ret setObject:val forKey:key];
    }
    return [[ret retain] autorelease];
}
+ (id)structueWithWebScriptObject:(WebScriptObject *)obj
                  webScriptObject:(WebScriptObject *)scriptObj
{    
    @try{
        NSMutableArray *ret = [NSMutableArray array];
        NSUInteger count = [[obj valueForKey:@"length"] integerValue]; //exception occure if associative array
        unsigned i;
        for (i = 0; i < count; i++) {
            id val= [obj webScriptValueAtIndex:i];
            if ([val isMemberOfClass:[WebScriptObject class]]) {
                val= [SampleAppDelegate structueWithWebScriptObject:val
                                                    webScriptObject:scriptObj];
            }
            [ret addObject:val];
        }
        return [[ret retain] autorelease];        
    }
    @catch (NSException *e) {
        return [SampleAppDelegate dictionaryWithWebScriptObject:obj
                                                webScriptObject:scriptObj];
    }
}
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    WebView *webView = [[WebView alloc] init];
    [[webView mainFrame] loadHTMLString:@"" baseURL:NULL];
    WebScriptObject *scriptObject = [webView windowScriptObject];

    NSString *_f0_= @"function _f0_(hash){var ret=[];for(var key in hash){ret.push(key);}return ret;}";

    NSString *returnValue= @"[{'key0':['val000', 'val001'], 'key1':'val01'}, {'key0':'val10', 'key1':['val110', 'val111']}]";
    NSString *code= [NSString stringWithFormat:@"function main(){return %@;}", returnValue];
    NSString *script = [NSString stringWithFormat:@"try { %@ %@ } catch (e) { e.toString() }", code, _f0_];

    id ret0= [scriptObject evaluateWebScript:script];
    if (![ret0 isMemberOfClass:[WebUndefined class]]) {
        NSLog(@"ret(main): %@", ret0);
    }
    
    id ret= [scriptObject callWebScriptMethod:@"main" withArguments:nil];
    if (ret && [ret isMemberOfClass:[WebScriptObject class]]) {
        WebScriptObject *obj= (WebScriptObject *)ret;
        NSArray *nsRet= [SampleAppDelegate structueWithWebScriptObject:obj 
                                                       webScriptObject:scriptObject];
        NSLog(@"%@", nsRet);
    }
}
@end

Result

Javascript

[{'key0':['val000', 'val001'], 'key1':'val01'}, {'key0':'val10', 'key1':['val110', 'val111']}]

Cocoa

(
        {
        key0 =         (
            val000,
            val001
        );
        key1 = val01;
    },
        {
        key0 = val10;
        key1 =         (
            val110,
            val111
        );
    }
)