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# Solves a randomized 8-puzzle using A* algorithm with plug-in heuristics

import random
import math

_goal_state = [[1,2,3],
               [4,5,6],
               [7,8,0]]

def index(item, seq):

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import numpy as np
import cv2

# cv2.getGaborKernel(ksize, sigma, theta, lambda, gamma, psi, ktype)
# ksize - size of gabor filter (n, n)
# sigma - standard deviation of the gaussian function
# theta - orientation of the normal to the parallel stripes
# lambda - wavelength of the sunusoidal factor
# gamma - spatial aspect ratio
# psi - phase offset

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*

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    FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc]
                                  initWithGraphPath:@"me/friends"
                                  parameters:nil
                                  HTTPMethod:@"GET"];
    [request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection,
                                          id result,
                                          NSError *error) {
        // Handle the result
        NSLog(@"%@", result);
    }];

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    // to list down all the available fonts in iOS
    
    for (NSString *fontFamilyName in [UIFont familyNames]) {
        for (NSString *fontName in [UIFont fontNamesForFamilyName:fontFamilyName]) {
            NSLog(@"Family: %@    Font: %@", fontFamilyName, fontName);
        }
    }

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// Convert the currency format: 1,000,000 to Rs.10,00,00
//

// Initialization
NSNumberFormatter *currencyFormatter = [[NSNumberFormatter alloc] init];
[currencyFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];
[currencyFormatter setCurrencySymbol:@"Rs."];
[currencyFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"en_IN"]];

NSString *str = [currencyFormatter stringFromNumber:[NSNumber numberWithFloat:price]];

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// UIStoryboard->UINavigationController->UIViewController
//

// Initializations
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
UINavigationController *controller = (UINavigationController *)[storyboard instantiateViewControllerWithIdentifier:@"identifier"];
SecondViewController *svc = (SecondViewController *)controller.topViewController;

// Passing data
svc.some_code = self.object.some_code;

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// UIViewController nagivation without the navigation controller.
// UIStoryboard->UINavigationController
//

// Initializations
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
SecondViewController *svc = (SecondViewController *)[storyboard instantiateViewControllerWithIdentifier:@"identifierName"];

// Navigation
dispatch_async(dispatch_get_main_queue(), ^{