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C++ constructor member initializers run in member declaration order

2013 Jul 18, 3:29

TL;DR: Keep your C++ class member declaration order the same as your constructor member initializers order.

C++ guarantees that the member initializers in a constructor are called in order. However the order in which they are called is the order in which the associated members are declared in the class, not the order in which they appear in the member initializer list. For instance, take the following code. I would have thought it would print "three, one, two", but in fact it prints, "one, two, three".

   
#include "stdafx.h"
#include

class PrintSomething {
public:
PrintSomething(const wchar_t *name) { std::wcout << name << std::endl; }
};

class NoteOrder {
public:
// This order doesn't matter.
NoteOrder() : three(L"three"), one(L"one"), two(L"two") { }

PrintSomething one;
PrintSomething two;
PrintSomething three;
};

int wmain(const int argc, const wchar_t* argv[])
{
NoteOrder note; // Prints one, two, three, not three, one, two!
return 0;
}
PermalinkCommentsc++ development programming technical

Ben Goldacre’s TED talk on publication bias, drug...

2012 Sep 28, 3:55


drug companies hiding the results of clinical trials.

(via I did a new talk at TED, on drug companies and hidden data.)

PermalinkCommentsscience video ted

Patent Office tries “Stack Overflow for patents” to find prior art | Ars Technica

2012 Sep 20, 2:27

Welcome news. Glad to hear they’re looking for improvements.

… the USPTO has also worked with Stack Exchange, … to create a new site called Ask Patents. … Examiners or others looking for prior art can post questions about a specific application, and members of the general public can respond with evidence that an applicant was not the first to invent the subject matter of the application.

PermalinkCommentsip law patent stack-exchange technical uspto

Newsroom: Miscellaneous: New Online Tool Gives Public Wider Access to Key U.S. Statistics

2012 Jul 28, 2:35

The U.S. Census Bureau today released a new online service that makes key demographic, socio-economic and housing statistics more accessible than ever before. The Census Bureau’s first-ever public Application Programming Interface (API) allows developers to design Web and mobile apps to explore or learn more about America’s changing population and economy.

PermalinkCommentstechnical api census statistics stats web restful rest

Mike Merrill Is a Publicly Traded Person | Motherboard

2012 Jul 1, 2:01

By which is meant the following:

Essentially, each shareholder has decided to buy into Merrill ’s life and help him make better choices that will then hopefully up the stock price, allowing them to make money should they ever decide to cash out.

What? Oh, he lives in Portland.

PermalinkCommentsMike-Merrill humor economics stock

WHATWG Weekly: http+aes URL scheme, control Referer, …

2012 Mar 7, 8:08

Seems generally bad to embed sensitive info in the URI (the http+aes URI scheme’s decryption key) similar to the now deprecated password field.

Use case is covered here: http://lists.w3.org/Archives/Public/ietf-http-wg/2012JanMar/0811.html.  Also discussion including someone mentioning the issue above.

PermalinkCommentstechnical html5 html uri uri-scheme http http+aes

Client Side Cross Domain Data YQL Hack

2012 Feb 27, 2:28

One of the more limiting issues of writing client side script in the browser is the same origin limitations of XMLHttpRequest. The latest version of all browsers support a subset of CORS to allow servers to opt-in particular resources for cross-domain access. Since IE8 there's XDomainRequest and in all other browsers (including IE10) there's XHR L2's cross-origin request features. But the vast majority of resources out on the web do not opt-in using CORS headers and so client side only web apps like a podcast player or a feed reader aren't doable.

One hack-y way around this I've found is to use YQL as a CORS proxy. YQL applies the CORS header to all its responses and among its features it allows a caller to request an arbitrary XML, HTML, or JSON resource. So my network helper script first attempts to access a URI directly using XDomainRequest if that exists and XMLHttpRequest otherwise. If that fails it then tries to use XDR or XHR to access the URI via YQL. I wrap my URIs in the following manner, where type is either "html", "xml", or "json":

        yqlRequest = function(uri, method, type, onComplete, onError) {
var yqlUri = "http://query.yahooapis.com/v1/public/yql?q=" +
encodeURIComponent("SELECT * FROM " + type + ' where url="' + encodeURIComponent(uri) + '"');

if (type == "html") {
yqlUri += encodeURIComponent(" and xpath='/*'");
}
else if (type == "json") {
yqlUri += "&callback=&format=json";
}
...

This also means I can get JSON data itself without having to go through JSONP.
PermalinkCommentsxhr javascript yql client-side technical yahoo xdr cors

Django Reinhardt-01-10 : Django Reinhardt : Free Download & Streaming : Internet Archive

2012 Jan 22, 4:40

This is Django Reinhardt’s Gypsy swing from the 30s and 40s on archive.org and it is all in the public domain. I didn’t know the term for the genre so it took me a while to find this.

PermalinkCommentsmusic public-domain django-reinhardt jazz gypsy-jazz

Copyright King: Why the "I Have a Dream" Speech Still Isn't Free (vice.com)

2012 Jan 17, 9:37

There’s weird stuff you’d think is public domain but isn’t including Martin Luther King Jr.‘s “I Have a Dream” speech. FTA: ”If you want to watch the whole thing, legally, you’ll need to get the $20 DVD.

That’s because the King estate, and, as of 2009, the British music publishing conglomerate EMI Publishing, owns the copyright of the speech and its recorded performance.”

PermalinkCommentscopyright mlk speech public-domain

James Joyce and Virginia Woolf copyrights expire tonight

2011 Dec 31, 2:35

More amazing works entering public domain. A shame that US works take such an extreme amount of time.

PermalinkCommentslegal public-domain copyright

I Know What You Downloaded on BitTorrent… (torrentfreak.com)

2011 Dec 10, 6:49

Public site that tracks who (by IP address) downloads what and lets anyone view this.

PermalinkCommentsprivacy torrent technical

Indicating Character Encoding and Language for HTTP Header Field Parameters

2011 Nov 24, 7:45

From the document: ‘Appendix B. Implementation Report: The encoding defined in this document currently is used for two different HTTP header fields: “Content-Disposition”, defined in [RFC6266], and “Link”, defined in [RFC5988]. As the encoding is a profile/clarification of the one defined in [RFC2231] in 1997, many user agents already supported it for use in “Content-Disposition” when [RFC5987] got published.

Since the publication of [RFC5987], two more popular desktop user agents have added support for this encoding; see http://purl.org/
   NET/http/content-disposition-tests#encoding-2231-char for details. At this time, only one major desktop user agent (Safari) does not support it.

Note that the implementation in Internet Explorer 9 does not support the ISO-8859-1 encoding; this document revision acknowledges that UTF-8 is sufficient for expressing all code points, and removes the requirement to support ISO-8859-1.’

Yay for UTF-8!

PermalinkCommentstechnical http http-headers ie9 internationalization utf-8 encoding

Telex

2011 Jul 18, 2:38Neat idea: "When the user wants to visit a blacklisted site, the client establishes an encrypted HTTPS connection to a non-blacklisted web server outside the censor’s network, which could be a normal site that the user regularly visits... The client secretly marks the connection as a Telex request by inserting a cryptographic tag into the headers. We construct this tag using a mechanism called public-key steganography... As the connection travels over the Internet en route to the non-blacklisted site, it passes through routers at various ISPs in the core of the network. We envision that some of these ISPs would deploy equipment we call Telex stations."PermalinkCommentsinternet security tools censorship technical

Playable Archaeology: An Interview with Telehack's Anonymous Creator - Waxy.org

2011 Jun 20, 2:25I knew it was a game but still felt bad war-dialing and otherwise messing around in there. What if I accidentally find a way out? "Telehack is the most interesting game I've played in the last year... a game that most users won't realize is a game at all. It's a tour de force hack — an interactive pastiche of 1980s computer history, tying together public archives of Usenet newsgroups, BBS textfiles, software archives, and historical computer networks into a multiplayer adventure game." Also, see all the accounts of people finding their teenage selves in the game.PermalinkCommentsinternet technical development hack telnet wardial game

Hidden device distorts news on wireless networks, brews beer, is time machine - Hack a Day

2011 May 30, 3:13"We covered the Newstweek, a wall-wart sized box that injects fake news stories over public WiFi connections last February, but now there’s a great walk through and it seems our doubts about this project were disproved."PermalinkCommentssecurity journalism wifi hack technical

Re: [FileAPI] File.slice spec bug from Jonas Sicking on 2011-04-12 (public-webapps@w3.org from April to June 2011)

2011 Apr 14, 11:27If only all web compat issues were so easily fixed: "If someone knows about any websites I can personally take care of contacting them and trying to get them fixed."PermalinkCommentsw3c reference file api standard

RFC 3797 - Publicly Verifiable Nominations Committee (NomCom) Random Selection

2010 Dec 13, 11:12Used to generate publicly verifiable random numbers. For instance to pick 'xn--' for the IDN prefix from a set of prefixes, they decided on a hash, a set of stocks and a time in the future to generate the hash from the stock values. The resulting value is random and anyone can check the work to verify that it was chosen randomly.


Although, now looking back from the future I can't verify that they didn't generate this data after the stock quotes came out. And they're using MD5...PermalinkCommentsrfc algorithm random election ietf technical

Urban Speaker, A Remote Public Address Art Installation

2010 Oct 6, 2:31PermalinkCommentsart qrcode qr sign phone cellphone

Google and Outlook Calendar Sync'ing

2010 Jul 8, 9:00
I previously described my desire to hook my Outlook calendar up to my Google calendar. I just found out that I can do this and the reverse as both support publishing calendars to the Internet. The following are how I set this up under Outlook 2010 and Google Calendar:

In Outlook, I go to the calendar view, right click on my calendar and select "Share Publish to Office.com". At this point I can change the permissions to allow anonymous Internet access, and under Detail change between 'Full details' (full calendar), 'Limited details' (subject lines & availability only), 'Availability only'. Availability only is almost just what I want -- I'd also like to include location but availability only is good enough. After hitting OK here I get a 'Do you want to send an invitation...' dialog box. I hit 'Yes' and I can copy the webcals:// URL out of the email window that opens up. Next, to add it to my Google calendar, I open http://www.google.com/calendar/, and under 'Other calendars', I select 'Add Add by URL', paste in that webcals:// URL but change the 'webcals' at the start to 'https'.

In Google Calendar, I can click on my calendar name under 'My calendars', select 'Calendar settings', and on the new page, look under 'Calendar Address', click the ICAL icon, and copy the URL in the new dialog. Now back in Outlook I go to the Calendar view, right click on 'My Calendars', and select 'Add Calendar From Internet...'. In the new dialog that pops up I paste in the URL from Google Calendar.

In this fashion I can share public calendar data between my personal and work calendars.
PermalinkComments

ThinkGeek :: Blurgh! The ThinkGeek Blog - Officially our best-ever cease and desist

2010 Jun 21, 1:15"We'd like to publicly apologize to the NPB for the confusion over unicorn and pork--and for their awkward extended pause on the phone after we had explained our unicorn meat doesn't actually exist."PermalinkCommentshumor copyright legal law thinkgeek unicorn pork
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