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from django.db import models

class Category(models.Model):
    title = models.CharField(verbose_name=u'Заголовок', max_length=255)
    left = models.IntegerField(blank=True, null=True)
    right = models.IntegerField(blank=True, null=True)
    parent = models.ForeignKey(verbose_name=u'Родительская категория', to='self', blank=True, null=True, related_name='children')
    position = models.IntegerField(verbose_name=u'Позиция', blank=True, null=True)
    level = models.IntegerField(blank=True, null=True)
    published = models.BooleanField(verbose_name=u'Опубликован', default=True)

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Category.objects.all()

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<VirtualHost *:80>
    DocumentRoot "/Applications/XAMPP/xamppfiles/htdocs/"
    ServerName localhost
    <Directory "/Applications/XAMPP/xamppfiles/htdocs/">
        Options Indexes FollowSymLinks Includes execCGI
        AllowOverride All
        Require all granted
    </Directory>
</VirtualHost>

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var h_hght = 150; // высота шапки
var h_mrg = 0;    // отступ когда шапка уже не видна
                 
$(function(){
 
    var elem = $('#top_nav');
    var top = $(this).scrollTop();
     
    if(top > h_hght){
        elem.css('top', h_mrg);

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function randomFun() {
    var items = $('.block-hit img'), randonItem;
    randonItem = items.eq(Math.floor(Math.random() * items.length));
    randonItem.show()
}
randomFun();

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function selfRandom(min, max)
{
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

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RewriteEngine on

RewriteCond %{HTTP:Accept-encoding} gzip
RewriteCond %{REQUEST_FILENAME}\.gz -s
RewriteRule ^(.*)\.css $1\.css\.gz [QSA]

RewriteCond %{HTTP:Accept-encoding} gzip
RewriteCond %{REQUEST_FILENAME}\.gz -s
RewriteRule ^(.*)\.js $1\.js\.gz [QSA]

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grep -rl 'слово' /dir/subdir/

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	$('КНОПКА').click(function(){
		
		if($('ОБЪЕКТ').attr('style')){
			$('ОБЪЕКТ').fadeOut(600);
			setTimeout("$('ОБЪЕКТ').removeAttr('style')", 700);
		}
		else{
			$('ОБЪЕКТ').fadeIn(600);
		}
		

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function heightDetect(){
		$('.main_head').css('height', $(window).height());
	};
	heightDetect();
	$(window).resize(heightDetect());