rlang,gcc,mongodb,groovy, elixir and objective-c

https://qiita.com/stkdev/items/6aba2c1db2fa056170ae
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http://ambiesoft.fam.cx/gcc/
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http://akiyoko.hatenablog.jp/entry/2014/08/01/220050
http://www.cuspy.org/diary/2012-04-17/  mongodbの薄い本
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https://koji-k.github.io/groovy-tutorial/index.html

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https://elixirschool.com/ja/ is good introducion site

------------------------------- at mac , see below --------- from libro tuyano

#import <Foundation/Foundation.h>

@interface MyTestClass : NSObject {
    NSString* message;
}

-(void)setMessage:(NSString*) str;
-(NSString*)message;
-(void)printMessage;

@end

@implementation MyTestClass

-(void)setMessage:(NSString*) str {
    message = str;
}

-(NSString*)message {
    return message;
}

-(void)printMessage {
    NSLog(@"%@",message);
}

@end

int main (int argc, const char * argv[]) {
    // NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
   
    MyTestClass* obj = [MyTestClass alloc];
    obj = [obj init];
    // obj = [obj autorelease];
    [obj setMessage:@"This is First Object!!"];
    [obj printMessage];
   
    // [pool drain];
    return 0;
}

-------------------   at linux, see below

http://krakenbeal.blogspot.jp/2009/07/ubuntu-objective-c-hello-world-2.html