tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

MightyPork

#include <stdint.h>

/**
 * Encode a code point using UTF-8
 * 
 * @author Ondřej Hruška <ondra@ondrovo.com>
 * @license MIT
 * 
 * @param out - output buffer (min 5 characters), will be 0-terminated
 * @param utf - code point 0-0x10FFFF

jonasbits

tell application "TextEdit"
  activate
	make new document
end tell


tell application "Notes"
	if folder "Archive" exists then
		set output to ""
		repeat with aNote in notes in folder "Archive"

larrybotha

Export multiple Adobe Illustrator artboards to png, jpg, pdf

This is a reference to Matthew Ericson's article Export Illustrator Layers and/or Artboards as PNGs and PDFs in case something happens to happen to the article, and if I just forget where to find the exporter online.

Usage

• Drop MultiExporter.js into /Applications/Adobe\ Illustrator\ CS6/Presets.localized/en_GB/Scripts
• Restart Illustrator

senjacob

namespace YourNamespace
{
    /// <summary>
    /// Uses the Name value of the ColumnAttribute specified, otherwise maps as usual.
    /// </summary>
    /// <typeparam name="T">The type of the object that this mapper applies to.</typeparam>
    public class ColumnAttributeTypeMapper<T> : FallbackTypeMapper
    {
        public static readonly string ColumnAttributeName = "ColumnAttribute";

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

kalebpederson

namespace YourNamespace
{
    /// <summary>
    /// Uses the Name value of the <see cref="ColumnAttribute"/> specified to determine
    /// the association between the name of the column in the query results and the member to
    /// which it will be extracted. If no column mapping is present all members are mapped as
    /// usual.
    /// </summary>
    /// <typeparam name="T">The type of the object that this association between the mapper applies to.</typeparam>
    public class ColumnAttributeTypeMapper<T> : FallbackTypeMapper