(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
-- show running queries (pre 9.2) | |
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query | |
FROM pg_stat_activity | |
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' | |
ORDER BY query_start desc; | |
-- show running queries (9.2) | |
SELECT pid, age(clock_timestamp(), query_start), usename, query | |
FROM pg_stat_activity | |
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' |
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
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.
elem.offsetLeft
, elem.offsetTop
, elem.offsetWidth
, elem.offsetHeight
, elem.offsetParent
Simply put, destructuring in Clojure is a way extract values from a datastructure and bind them to symbols, without having to explicitly traverse the datstructure. It allows for elegant and concise Clojure code.
Here is a list of scopes to use in Sublime Text 2 snippets - | |
ActionScript: source.actionscript.2 | |
AppleScript: source.applescript | |
ASP: source.asp | |
Batch FIle: source.dosbatch | |
C#: source.cs | |
C++: source.c++ | |
Clojure: source.clojure | |
CoffeeScript: source.coffee |
# Build an inverted index for a full-text search engine with Redis. | |
# Copyright (C) 2009 Salvatore Sanfilippo. Under the BSD License. | |
# USAGE: | |
# | |
# ruby invertedindex.rb add somedir/*.c | |
# ruby invertedindex.rb add somedir/*.txt | |
# ruby search your query string | |
require 'rubygems' | |
require 'redis' |
This describes how I setup Atom for an ideal Clojure development workflow. This fixes indentation on newlines, handles parentheses, etc. The keybinding settings for enter (in keymap.cson) are important to get proper newlines with indentation at the right level. There are other helpers in init.coffee and keymap.cson that are useful for cutting, copying, pasting, deleting, and indenting Lisp expressions.
The Atom documentation is excellent. It's highly worth reading the flight manual.
# Mac OS X Lion introduced a new, iOS-like context menu when you press and hold a key | |
# that enables you to choose a character from a menu of options. If you are on Lion | |
# try it by pressing and holding down 'e' in any app that uses the default NSTextField | |
# for input. | |
# | |
# It's a nice feature and continues the blending of Mac OS X and iOS features. However, | |
# it's a nightmare to deal with in Sublime Text if you're running Vintage (Vim) mode, | |
# as it means you cannot press and hold h/j/k/l to move through your file. You have | |
# to repeatedly press the keys to navigate. |