Dmitry d9k

One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:

def tree(): return defaultdict(tree)

That's it!

A minimum setting to use browser REPL of ClojureScript

Assumed that you have set leiningen up and can use it.

1. Prepare files

Copy project.clj, repl-test.cljs and brepl-test.html from this gist or git clone this gist and move or copy repl-test.cljs under src directory.

$ git clone https://gist.github.com/6183122.git
$ cd 6183122/

Prepare an environment according to A minimum setting to use browser REPL of ClojureScript.
Input lines of dom-example.cljs to the REPL.
Here's a SCREEN CAST.

Enjoy!

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

	## widget

	import httplib2
	from urllib import urlencode

	import colander
	from colander import null
	from colander import Invalid

	from deform.widget import CheckedInputWidget

	; A REPL-based, annotated Seesaw tutorial
	; Please visit https://github.com/daveray/seesaw for more info
	;
	; This is a very basic intro to Seesaw, a Clojure UI toolkit. It covers
	; Seesaw's basic features and philosophy, but only scratches the surface
	; of what's available. It only assumes knowledge of Clojure. No Swing or
	; Java experience is needed.
	;
	; This material was first presented in a talk at @CraftsmanGuild in
	; Ann Arbor, MI.

	if has("autocmd")
	" remove trailing white spaces
	autocmd BufWritePre * :%s/\s\+$//e
	endif

	from pprint import pprint
	import jinja2
	import markdown

	HTML_TEMPLATE = """{% macro get_html() %}
	{{ content \| markdown }}
	{% endmacro %}
	{% set html_content = get_html() %}

	Title from Markdown meta-data: {{ get_title() }}

	#!/bin/bash

	# Huikee CSV-to-XLSX konvertteri by Samuli
	# Versio 2.0, using unoconv
	# Unicode now works

	root_dir=$(pwd)
	FOLDERS=$(find $root_dir -type d)

	for fol in $FOLDERS

	# Based on http://techspot.zzzeek.org/2011/01/14/the-enum-recipe/

	import six
	from sqlalchemy.dialects import postgresql
	from sqlalchemy.types import SchemaType, TypeDecorator, Enum
	from sqlalchemy import __version__, text, cast
	import re

	if __version__ < '0.6.5':
	raise NotImplementedError("Version 0.6.5 or higher of SQLAlchemy is required.")