Val Packett valpackett

Pagination 101

Article by Faruk Ateş, [originally on KuraFire.net][original] which is currently down

One of the most commonly overlooked and under-refined elements of a website is its pagination controls. In many cases, these are treated as an afterthought. I rarely come across a website that has decent pagination, and it always makes me wonder why so few manage to get it right. After all, I'd say that pagination is pretty easy to get right. Alas, that doesn't seem the case, so after encouragement from Chris Messina on Flickr I decided to write my Pagination 101, hopefully it'll give you some clues as to what makes good pagination.

Before going into analyzing good and bad pagination, I want to explain just what I consider to be pagination: Pagination is any kind of control system that lets the user browse through pages of search results, archives, or any other kind of continued content. Search results are the o

	class QuerySetDoubleIteration(Exception):
	"A QuerySet was iterated over twice, you probably want to list() it."
	pass


	# "Skinny" here means we use iterator by default, rather than
	# ballooning in memory.
	class SkinnyManager(Manager):
	def get_query_set(self):
	return SkinnyQuerySet(self.model, using=self._db)

	def wins(grid):
	rows = [[grid[i+j] for j in 0, 1, 2] for i in 0, 3, 6]
	cols = [[grid[i+j] for j in 0, 3, 6] for i in 0, 1, 2]
	digs = [[grid[i] for i in 0, 4, 8], [grid[i] for i in 2, 4, 6]]
	return any(all(cell is 'x' for cell in row) or
	all(cell is 'o' for cell in row)
	for row in rows + cols + digs)

	def full(grid):
	return all(cell is 'x' or cell is 'o' for cell in grid)

	<!DOCTYPE html>

	<!-- Helpful things to keep in your <head/>
	// Brian Blakely, 360i
	// http://twitter.com/brianblakely/
	-->
	<head>

	<!-- Disable automatic DNS prefetching.

	/*
	* Fabrizio Calderan, twitter @fcalderan, 2010.11.02
	* I had an idea: could Inception movie be explained by a few javascript closures
	* and variable resolution scope (just for fun)?
	*
	* Activate javascript console =)
	*/

	<script>
	console.group("inception movie");

	(defun coda-swap (expr)
	(interactive "sExpr: ")
	(query-replace-regexp
	(replace-regexp-in-string "$[1-2]" "\\\\([0-9a-zA-Z]*\\\\)" expr)
	(replace-regexp-in-string "$[1-2]" (lambda (m) (if (equal m "$1") "\\\\2" "\\\\1")) expr)))

	;; Example:
	; enter
	; width="$1" height="$2"
	; and it will replace

	from django.core.cache import cache
	from django.http import HttpResponseForbidden
	from functools import wraps
	from django.utils.decorators import available_attrs

	def ratelimit(limit=10,length=86400):
	""" The length is in seconds and defaults to a day"""
	def decorator(func):
	def inner(request, args, *kwargs):
	ip_hash = str(hash(request.META['REMOTE_ADDR']))

	#! /usr/bin/env python

	""" Convert values between RGB hex codes and xterm-256 color codes.

	Nice long listing of all 256 colors and their codes. Useful for
	developing console color themes, or even script output schemes.

	Resources:
	* http://en.wikipedia.org/wiki/8-bit_color
	* http://en.wikipedia.org/wiki/ANSI_escape_code

	class Array
	def self.toy(n=10, &block)
	block_given? ? Array.new(n,&block) : Array.new(n) {\|i\| i+1}
	end
	end

	class Hash
	def self.toy(n=10)
	Hash[Array.toy(n).zip(Array.toy(n){\|c\| (96+(c+1)).chr})]
	end