TweetFollow Us on Twitter

Mar 95 Challenge
Volume Number:11
Issue Number:3
Column Tag:Programmer’s Challenge

Programmer’s Challenge

By Mike Scanlin, Mountain View, CA

Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.

Method Dispatcher

One of the main reasons why I don’t like object oriented languages is because of the inefficiencies the language usually introduces on the runtime code. If you’ve ever traced through a method dispatch routine then you know what I mean (what ever happened to the days of simple, direct JSR’s?). This month you have a chance to write a fast method dispatcher. Who knows? If it’s efficient enough I might just toss my assembler and use your dispatcher with a high level language instead...

The prototype of the function you write is:

typedef unsigned short ushort;
typedef ushort ClassID;
typedef ushort MethodNumber;

MethodAddress
FindMethod(theClassID, theMethodNumber)
ClassID theClassID;
MethodNumbertheMethodNumber;

TheMethodNumber is the number of the method you’re trying to find the address of and theClassID is the ID of the class you want it for. You’ll pass theClassID to a function called GetClassPtr to get a pointer to a Class data structure, which looks like this:

typedef void *MethodAddress;

typedef struct {
 MethodNumber  methodNumber;
 MethodAddress methodAddress;
} MethodEntry;

typedef struct {
 ushort inheritedCount;
 ushort inheritedClasses[15];
 MethodNumber  largestMethodNumber;
 ushort methodCount;
 MethodEntrymethods[];
} Class, *ClassPtr;

The function GetClassPtr will be part of my test bench, although you’ll have to implement at least a rudimentary version of it to test your program (or you can e-mail me for a sample version):

ClassPtr
GetClassPtr(classID)
unsigned short classID;

If GetClassPtr returns -1 (kClassNotFound) then the class cannot be found and your FindMethod routine should return 0 (kMethodNotFound). I will be providing sample data and a sample GetClassPtr function for those who are interested. To get a copy, send me e-mail at scanlin@genmagic.com (internet) or any of the Programmer Challenge addresses listed on page 2.

Once you have a ClassPtr you should look in that class’s methods[] array to see if you can find an entry whose methodNumber is equal to theMethodNumber. Methods[] is a variable-length array (thus, making Class a variable-size structure) containing methodCount number of entries which are sorted smallest to largest by methodNumber. MethodCount is 1-based and is always greater than zero. If you find a match then you should return the corresponding methodAddress.

If you don’t find a match then you should look at the inherited classes (starting with index zero) to see if the method is implemented by one of this class’s superclasses. We support multiple inheritance here and the number of classes we inherit from is stored in inheritedCount (which will be from zero to 15). The class IDs of the classes we inherit from are stored in the inheritedClasses[ ] array. You can pass any of the entries in inheritedClasses to GetClassPtr to get a ClassPtr to that class.

If you can’t find the requested methodNumber in any part of the inheritance tree then FindMethod should return zero (kMethodNotFound).

Here’s a simple example. These 54 bytes (starting at location 0x1000) represent class ID 5:

1000:00000000 00000000 00000000 00000000 
1010:00000000 00000000 00000000 00000000 
1020:00680003 0023AAAA AAAA0057 BBBBBBBB 
1030:0068CCCC CCCC 

The short at location 1000 (inheritedCount) tells us that there are no inherited classes for this class. The short at location 1022 (methodCount) tells us that this class has 3 methods. Methods[0] is from 1024 to 1029; the methodNumber is 23 and the methodAddress is AAAAAAAA (this is just test data to illustrate the structure). Methods[1] is from 102A to 102F and methods[2] is from 1030 to 1035. The short at location 1020 (largestMethodNumber) is equal to the methodNumber of the last MethodEntry in the list (which is the largest methodNumber overall since the list is sorted). In other words, the expression theClassPtr->largestMethodNumber == theClassPtr-> methods[theClassPtr->methodCount-1].methodNumber is always true.

If this class had inherited from class 7 and class 9 then it would have looked like this instead:

1000:00020007 00090000 00000000 00000000 
1010:00000000 00000000 00000000 00000000 
1020:00680003 0023AAAA AAAA0057 BBBBBBBB 
1030:0068CCCC CCCC 

In either case, if you call GetClassPtr(5), since this is class 5 we’re looking at, you would have the value 0x1000 (as type ClassPtr) returned to you.

Since I’ll be calling FindMethod several thousand times with the same set of classes (just like a real runtime system!) you’ll probably want to implement some kind of cache. And since it is desirable for runtime systems to take as little memory as possible, we’re going to have a rule that says your code cannot use more than 16K of memory for its cache (use a static to keep a pointer to it). The total number of methods in the set of classes I’ll be testing with is about 5000, numbered from 1 to 5000. The total number of classes is about 400, numbered from 1 to 400. Those 400 classes will implement an average of 15 methods each and will inherit from an average of 5 other classes (that’s 5 total, once you’ve walked the entire inheritance tree for a particular class). Of course, some methods will be called frequently while others are hardly ever called.

Because this is a little complex, I’m going to give you the brute force way of doing what I’ve described. I’m sure you can do better than this (I’ve used short variable names so that the code will fit in the magazine column):

MethodAddress
FindMethod(cid, mn)
ClassID cid;
MethodNumbermn;
{
 ClassPtr cp;
 MethodAddress addr;
 int    i;
 
 cp = GetClassPtr(cid);
 if (cp == kClassNotFound)
 return kMethodNotFound;
 
 /* look in this class */
 i = 0;
 do {
 if (mn == cp->methods[i].methodNumber)
 return cp->methods[i].methodAddress;
 i++;
 } while (i < cp->methodCount);
 
 /* look in superclasses */
 i = 0;
 while (i < cp->inheritedCount) {
 addr = FindMethod( cp->inheritedClasses[i], mn);
 if (addr != kMethodNotFound)
 return addr;
 i++;
 }
 return kMethodNotFound;
}

E-mail me if you have any questions or if you want the sample data and GetClassPtr function. And if you want to see your name in print all you have to do is either enter a challenge or have me use one of your suggested challenges.

Two Months Ago Winner

Congratulations to Kevin Cutts (Schaumburg, IL) for winning the Poker Hand Evaluator Challenge. And kudos to Gustav Larsson (Mountain View, CA) for being 60% smaller and only about 4% slower than Kevin.

Here are the times and code sizes for each entry. Numbers in parens after a person’s name indicate how many times that person has finished in the top 5 places of all previous Programmer Challenges, not including this one:

Name time code

Kevin Cutts (3) 317 6022

Gustav Larsson 331 2656

Jeff Mallett (3) 331 9428

Ernst Munter (5) 457 2516

Dave Darrah (1) 749 2996

Raffi Kasparian (1) 1230 7394

Kevin wrote four different versions of his BestHand routine; one for every combination of the Booleans wildCardAllowed and straightsAndFlushesValid. That’s a great idea for performance but because of space constraints, we’re only listing the BestHandNoWild version which is for the case where wild cards are not allowed but straights and flushes are valid (which is probably the typical case for poker). The source code to the remaining cases can be found on-line or on this month’s code disk.

Here is Kevin’s winning solution:

January Solution -Poker-

by Kevin M. Cutts

#include <stdlib.h>
#include <stdio.h>

typedef unsigned char Card;

typedef struct SevenCardHand 
{
 Card cards[7];
} SevenCardHand;

typedef struct FiveCardHand
{
 Card cards[5];
} FiveCardHand;

short ComparePokerHands(
 SevenCardHand *, 
 SevenCardHand *,
 FiveCardHand *,
 FiveCardHand *,
 Boolean,
 Card,
 Boolean,
 void *); 

/* Used to remove the suit information and leave only the count from the card */
unsigned char theValue[] = {
0,1,2,3,4,5,6,7,8,9,10,11,12,
0,1,2,3,4,5,6,7,8,9,10,11,12,
0,1,2,3,4,5,6,7,8,9,10,11,12,
0,1,2,3,4,5,6,7,8,9,10,11,12,
};

/* Used to remove card value and leave the suit indicator */
unsigned char theSuit[] = {
0,0,0,0,0,0,0,0,0,0,0,0,0,
1,1,1,1,1,1,1,1,1,1,1,1,1,
2,2,2,2,2,2,2,2,2,2,2,2,2,
3,3,3,3,3,3,3,3,3,3,3,3,3,
};

/* A bit for each card value (aces have two bits) */
unsigned short theValueBit[] = {
0x1000,0x800,0x400,0x200,0x100,0x80,0x40,
 0x20,0x10,0x8,0x4,0x2,0x2001,
0x1000,0x800,0x400,0x200,0x100,0x80,0x40,
 0x20,0x10,0x8,0x4,0x2,0x2001,
0x1000,0x800,0x400,0x200,0x100,0x80,0x40,
 0x20,0x10,0x8,0x4,0x2,0x2001,
0x1000,0x800,0x400,0x200,0x100,0x80,0x40,
 0x20,0x10,0x8,0x4,0x2,0x2001,
};

#define fiveAlike0xa000
#define straightFlush0x9000
#define fourAlike0x8000
#define fullHouse0x7000
#define flush    0x6000
#define straight 0x5000
#define threeAlike 0x4000
#define twoPair  0x3000
#define pair0x2000

#define nonCard 0xff
/* These four functions are custom to handle the four bools wild and flush */
unsigned int BestHandNoWild(SevenCardHand *theHand, 
 FiveCardHand *theBest);
unsigned int BestHand(SevenCardHand *theHand, 
 FiveCardHand *theBest, Card wildCard);
unsigned int BestHandNoFlush(SevenCardHand *theHand, 
 FiveCardHand *theBest, Card wildCard);
unsigned int BestHandNoFlushNoWild(SevenCardHand *theHand, 
 FiveCardHand *theBest);

BestHandNoWild

unsigned int BestHandNoWild(SevenCardHand *theHand, 
 FiveCardHand *theBest)
{
    /* How many of each card value encountered */
 unsigned char handValues[13];
    /* How many of each suit encountered */ 
 unsigned char handSuits[4];
    /* Bit field describing on a suit by suit basis how populated the hand is */ 
 short handRuns[4]; 
 register short i;
 short j;
 Card bestCard, bestPair, goodPair, bestTri, bestQuad;
 Card *cardPtr;
 short runSweep, runResult, runCount;

    /* Zero out all of the counts */
 *(long *)&handValues[0] = 
 *(long *)&handValues[4] = 
 *(long *)&handValues[8] = 
 handValues[12] = 0;
 *(long *)&handSuits[0] = 0;
 *(long *)&handRuns[0] = *(long *)&handRuns[2] = 0;

    /* Now accumulate the values */
 for (i=0, cardPtr=theHand->cards; i<7; i++, cardPtr++)
 {
 handValues[theValue[*cardPtr]]++;
 handSuits[theSuit[*cardPtr]]++;
 handRuns[theSuit[*cardPtr]] |= theValueBit[*cardPtr];
 }
    /* First count the pairs, tris, quads and penta */
 bestCard = bestPair = goodPair = bestTri = bestQuad = nonCard;
 for (i = 12; i >= 0; i--)
 {
 if (!(j = handValues[i])) continue;
 if (j == 4)
 {
 bestQuad = i;
 break;
 }
 if (j == 3 && bestTri == nonCard)
 {
 bestTri = i;
 if (bestPair != nonCard)
 {
 /* Full house */
 break;
 }
 }
 else if (j == 2 && bestPair == nonCard)
 {
 bestPair = i;
 if (bestTri != nonCard)
 {
 /* Full house */
 break;
 }
 }
 else if (j == 2 && goodPair == nonCard)
 {
 goodPair = i;
 }
 else if (bestCard == nonCard)
 {
 bestCard = i;
 }
 }
    /* Now check for a straight flush */
#define CHK_SUIT_NOWILD(suit) \
 if (handSuits[suit] >= 5) \
 { \
 for (runSweep=0x1f;runSweep<0x1fff;runSweep<<= 1) \
 { \
 runResult = handRuns[suit] & runSweep; \
 if (runResult == runSweep) \
 { \
 /* Transfer the five cards */ \
 for (i=0, j=0; j < 5;i++) \
 { \
 if ((theValueBit[theHand->cards[i]] & \
 runSweep && suit == \
 theSuit[theHand->cards[i]])) \
 { \
 theBest->cards[j++] = \
 theHand->cards[i]; \
 } \
 } \
 return straightFlush; \
 } \
 } \
 }
 CHK_SUIT_NOWILD(0);
 CHK_SUIT_NOWILD(1);
 CHK_SUIT_NOWILD(2);
 CHK_SUIT_NOWILD(3);
    /* Next comes four of a kind */
 if (bestQuad != nonCard)
 {
    /* Transfer the five cards */
 runSweep = 1;
 for (i=0, j=0; j < 5;i++)
 {
 if (theValue[theHand->cards[i]] == bestQuad)
 {
 theBest->cards[j++] = theHand->cards[i];
 }
 else if (runSweep)
 {
 theBest->cards[j++] = theHand->cards[i];
 runSweep--;
 }
 }
 return fourAlike | bestQuad;
 }
    /* Next is the full house */
 if (bestTri != nonCard && bestPair != nonCard)
 {
    /* Transfer the five cards */
 for (i=0, j=0; j < 5;i++)
 {
 if (theValue[theHand->cards[i]] == bestTri || 
 theValue[theHand->cards[i]] == bestPair)
 {
 theBest->cards[j++] = theHand->cards[i];
 }
 }
 return fullHouse | (bestTri<<8) | (bestPair);
 }
    /* Now the flush */
#define CHK_FLUSH_NOWILD(suit) \
 if (handSuits[suit] >= 5) \
 { \
    /* Transfer the five cards */ \
 for (i=0, j=0; j < 5;i++) \
 { \
 if (theSuit[theHand->cards[i]] == suit) \
 { \
 theBest->cards[j++] = theHand->cards[i]; \
 } \
 } \
 return flush | bestCard; \
 }
 CHK_FLUSH_NOWILD(0);
 CHK_FLUSH_NOWILD(1);
 CHK_FLUSH_NOWILD(2);
 CHK_FLUSH_NOWILD(3);
    /* Next the straight */
 j = handRuns[0]|handRuns[1]|handRuns[2] | handRuns[3];
 for (runSweep=0x1f; runSweep < 0x1fff; runSweep <<= 1)
 {
 runResult = j & runSweep;
 if (runResult == runSweep)
 {
    /* Transfer the five cards */
 for (i=0, j=0; j < 5;i++)
 {
 if ((theValueBit[theHand->cards[i]] & runSweep))
 {
 theBest->cards[j++] = theHand->cards[i];
 }
 }
 return straight;
 }
 }
    /* and the three of a kind */
 if (bestTri != nonCard)
 {
    /* Transfer the five cards */
 runSweep = 2;
 for (i=0, j=0; j < 5;i++)
 {
 if (theValue[theHand->cards[i]] == bestTri)
 {
 theBest->cards[j++] = theHand->cards[i];
 }
 else if (runSweep)
 {
 theBest->cards[j++] = theHand->cards[i];
 runSweep--;
 }
 }
 return threeAlike | bestTri;
 }
    /* Now two pair */
 if (bestPair != nonCard && goodPair != nonCard)
 {
    /* Transfer the five cards */
 runSweep = 1;
 for (i=0, j=0; j < 5;i++)
 {
 if (theValue[theHand->cards[i]] == bestPair ||
 theValue[theHand->cards[i]] == goodPair)
 {
 theBest->cards[j++] = theHand->cards[i];
 }
 else if (runSweep)
 {
 theBest->cards[j++] = theHand->cards[i];
 runSweep--;
 }
 }
 return twoPair | (bestPair << 8) | goodPair;
 }
    /* And finally a single pair */
 if (bestPair != nonCard)
 {
    /* Transfer the five cards */
 runSweep = 3;
 for (i=0, j=0; j < 5;i++)
 {
 if (theValue[theHand->cards[i]] == bestPair)
 {
 theBest->cards[j++] = theHand->cards[i];
 }
 else if (runSweep)
 {
 theBest->cards[j++] = theHand->cards[i];
 runSweep--;
 }
 }
 return pair | bestPair;
 }
    /* Transfer the five cards */
 runSweep = 4;
 for (i=0, j=0; j < 5;i++)
 {
 if (theValue[theHand->cards[i]] == bestCard)
 {
 theBest->cards[j++] = theHand->cards[i];
 }
 else if (runSweep)
 {
 theBest->cards[j++] = theHand->cards[i];
 runSweep--;
 }
 }
 return bestCard;
}

ComparePokerHands

short ComparePokerHands(
 SevenCardHand *hand1Ptr, 
 SevenCardHand *hand2Ptr,
 FiveCardHand *best1Ptr,
 FiveCardHand *best2Ptr,
 Boolean wildCardAllowed,
 Card wildCard,
 Boolean straightsdAndFlushesValid,
 void *privateDataPtr)
{
 unsigned int hand1Value, hand2Value;
 if (wildCardAllowed && straightsdAndFlushesValid)
 {
 hand1Value = BestHand(hand1Ptr, best1Ptr, wildCard);
 hand2Value = BestHand(hand2Ptr, best2Ptr, wildCard);
 }
 else if (wildCardAllowed)
 {
 hand1Value = BestHandNoFlush(hand1Ptr,best1Ptr,wildCard);
 hand2Value = BestHandNoFlush(hand2Ptr,best2Ptr,wildCard);
 }
 else if (straightsdAndFlushesValid)
 {
 hand1Value = BestHandNoWild(hand1Ptr, best1Ptr);
 hand2Value = BestHandNoWild(hand2Ptr, best2Ptr);
 }
 else
 {
 hand1Value = BestHandNoFlushNoWild(hand1Ptr, best1Ptr);
 hand2Value = BestHandNoFlushNoWild(hand2Ptr, best2Ptr);
 }
 if (hand1Value > hand2Value) return -1;
 if (hand1Value < hand2Value) return 1;
 return 0;
} 

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Adobe After Effects CC 2018 16.1.3 - Cre...
After Effects CC 2018 is available as part of Adobe Creative Cloud for $52.99/month (or $20.99/month for a single app license). The new, more connected After Effects CC 2018 can make the impossible... Read more
Adobe Audition CC 2019 12.1.4 - Professi...
Audition CC 2019 is available as part of Adobe Creative Cloud for as little as $20.99/month (or $9.99/month if you're a previous Audition customer). Adobe Audition CC 2019 empowers you to create and... Read more
Adobe Premiere Pro CC 2019 13.1.5 - Digi...
Premiere Pro CC 2019 is available as part of Adobe Creative Cloud for as little as $52.99/month. The price on display is a price for annual by-monthly plan for Adobe Premiere Pro only Adobe Premiere... Read more
Navicat Premium Essentials 12.1.25 - Pro...
Navicat Premium Essentials is a compact version of Navicat which provides basic and necessary features you will need to perform simple administration on a database. It supports the latest features... Read more
Sketch 58 - Design app for UX/UI for iOS...
Sketch is an innovative and fresh look at vector drawing. Its intentionally minimalist design is based upon a drawing space of unlimited size and layers, free of palettes, panels, menus, windows, and... Read more
ClipGrab 3.8.5 - Download videos from Yo...
ClipGrab is a free downloader and converter for YouTube, Vimeo, Facebook and many other online video sites. It converts downloaded videos to MPEG4, MP3 or other formats in just one easy step Version... Read more
Dash 4.6.6 - Instant search and offline...
Dash is an API documentation browser and code snippet manager. Dash helps you store snippets of code, as well as instantly search and browse documentation for almost any API you might use (for a full... Read more
FotoMagico 5.6.8 - Powerful slideshow cr...
FotoMagico lets you create professional slideshows from your photos and music with just a few, simple mouse clicks. It sports a very clean and intuitive yet powerful user interface. High image... Read more
Civilization VI 1.2.4 - Next iteration o...
Sid Meier’s Civilization VI is the next entry in the popular Civilization franchise. Originally created by legendary game designer Sid Meier, Civilization is a strategy game in which you attempt to... Read more
Skype 8.52.0.138 - Voice-over-internet p...
Skype allows you to talk to friends, family and co-workers across the Internet without the inconvenience of long distance telephone charges. Using peer-to-peer data transmission technology, Skype... Read more

Latest Forum Discussions

See All

Lots of premium games are going free (so...
You may have seen over the past couple weeks a that a bunch of premium games have suddenly become free. This isn’t a mistake, nor is it some last hurrah before Apple Arcade hits, and it’s important to know that these games aren’t actually becoming... | Read more »
Yoozoo Games launches Saint Seiya Awaken...
If you’re into your anime, you’ve probably seen or heard of Saint Seiya. Based on a shonen manga by Masami Kurumada, the series was massively popular in the 1980s – especially in its native Japan. Since then, it’s grown into a franchise of all... | Read more »
Five Nights at Freddy's AR: Special...
Five Nights at Freddy's AR: Special Delivery is a terrifying new nightmare from developer Illumix. Last week, FNAF fans were sent into a frenzy by a short teaser for what we now know to be Special Delivery. Those in the comments were quick to... | Read more »
Rush Rally 3's new live events are...
Last week, Rush Rally 3 got updated with live events, and it’s one of the best things to happen to racing games on mobile. Prior to this update, the game already had multiplayer, but live events are more convenient in the sense that it’s somewhat... | Read more »
Why your free-to-play racer sucks
It’s been this way for a while now, but playing Hot Wheels Infinite Loop really highlights a big issue with free-to-play mobile racing games: They suck. It doesn’t matter if you’re trying going for realism, cart racing, or arcade nonsense, they’re... | Read more »
Steam Link Spotlight - The Banner Saga 3
Steam Link Spotlight is a new feature where we take a look at PC games that play exceptionally well using the Steam Link app. Our last entry talked about Terry Cavanaugh’s incredible Dicey Dungeons. Read about how it’s a great mobile experience... | Read more »
PSA: GRIS has some issues
You may or may not have seen that Devolver Digital just released GRIS on the App Store, but we wanted to do a quick public service announcement to say that you might not want to hop on buying it just yet. The puzzle platformer has come to small... | Read more »
Combo Quest (Games)
Combo Quest 1.0 Device: iOS Universal Category: Games Price: $.99, Version: 1.0 (iTunes) Description: Combo Quest is an epic, time tap role-playing adventure. In this unique masterpiece, you are a knight on a heroic quest to retrieve... | Read more »
Hero Emblems (Games)
Hero Emblems 1.0 Device: iOS Universal Category: Games Price: $2.99, Version: 1.0 (iTunes) Description: ** 25% OFF for a limited time to celebrate the release ** ** Note for iPhone 6 user: If it doesn't run fullscreen on your device... | Read more »
Puzzle Blitz (Games)
Puzzle Blitz 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Puzzle Blitz is a frantic puzzle solving race against the clock! Solve as many puzzles as you can, before time runs out! You have... | Read more »

Price Scanner via MacPrices.net

Final week: Apple’s 2019 Back to School Promo...
Purchase a new Mac using Apple’s Education discount, and take up to $400 off MSRP. All teachers, students, and staff of any educational institution with a .edu email address qualify for the discount... Read more
Save $30 on Apple’s AirPods at these reseller...
Amazon is offering discounts on new 2019 Apple AirPods ranging up to $30 off MSRP as part of their Labor Day sale. Shipping is free: – AirPods with Charging Case: $144.95 $15 off MSRP – AirPods with... Read more
Preorder your Apple Watch Series 5 today at A...
Amazon has Apple Watch Series 5 GPS models available for preorder and on sale today for $15 off Apple’s MSRP. Shipping is free and starts on September 20th: – 40mm Apple Watch Series 5 GPS: $384.99 $... Read more
21″ iMacs on sale for $100 off Apple’s MSRP,...
B&H Photo has new 21″ Apple iMacs on sale for $100 off MSRP with models available starting at $999. These are the same iMacs offered by Apple in their retail and online stores. Overnight shipping... Read more
2018 4 and 6-Core Mac minis on sale today for...
Apple resellers are offering new 2018 4-Core and 6-Core Mac minis for $100-$150 off MSRP for a limited time. B&H Photo has the new 2018 4-Core and 6-Core Mac minis on sale for up to $150 off... Read more
Save $150-$250 on 10.2″ WiFi + Cellular iPads...
Verizon is offering $150-$250 discounts on Apple’s new 10.2″ WiFi + Cellular iPad with service. Buy the iPad itself and save $150. Save $250 on the purchase of an iPad along with an iPhone. The fine... Read more
Apple continues to offer 13″ 2.3GHz Dual-Core...
Apple has Certified Refurbished 2017 13″ 2.3GHz Dual-Core non-Touch Bar MacBook Pros available starting at $1019. An standard Apple one-year warranty is included with each model, outer cases are new... Read more
Apple restocks 2018 MacBook Airs, Certified R...
Apple has restocked Certified Refurbished 2018 13″ MacBook Airs starting at only $849. Each MacBook features a new outer case, comes with a standard Apple one-year warranty, and is shipped free. The... Read more
Sunday Sale! 2019 27″ 5K 6-Core iMacs for $20...
B&H Photo has the new 2019 27″ 5K 6-Core iMacs on stock today and on sale for up to $250 off Apple’s MSRP. Overnight shipping is free to many locations in the US. These are the same iMacs sold by... Read more
Weekend Sale! 2019 13″ MacBook Airs for $200...
Amazon has new 2019 13″ MacBook Airs on sale for $200 off Apple’s MSRP, with prices starting at $899, each including free shipping. Be sure to select Amazon as the seller during checkout, rather than... Read more

Jobs Board

Student Employment (Blue *Apple* Cafe) Spri...
Student Employment (Blue Apple Cafe) Spring 2019 Penn State University Campus/Location: Penn State Brandywine Campus City: Media, PA Date Announced: 12/20/2018 Date Read more
Geek Squad *Apple* Master Consultation Agen...
**732907BR** **Job Title:** Geek Squad Apple Master Consultation Agent **Job Category:** Services/Installation/Repair **Location Number:** 000360-Williston-Store Read more
*Apple* Mobile Master - Best Buy (United Sta...
**728519BR** **Job Title:** Apple Mobile Master **Job Category:** Store Associates **Location Number:** 000853-Jackson-Store **Job Description:** **What does a Best Read more
*Apple* Mobility Pro - Best Buy (United Stat...
**733006BR** **Job Title:** Apple Mobility Pro **Job Category:** Store Associates **Location Number:** 000865-Conroe-Store **Job Description:** At Best Buy, our Read more
*Apple* Mobility Pro-Store 149 - Best Buy (U...
**731985BR** **Job Title:** Apple Mobility Pro-Store 149 **Job Category:** Store Associates **Location Number:** 000149-Towson-Store **Job Description:** At Best Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.