getsat

Pardo's book is ballin'. Walk Forward Analysis is the key to a successful trading strategy. There isn't really any math in it.

I haven't really had much use for math in algo trading so far. I get ideas from looking at historical chart data, code up a base algorithm which implements an idea, and use genetic algorithms to find optimal values for range-bound variables (e.g., a float between 0.995 and 0.997) in the "optimization" step of WFA. I then run WFA across my defined in and out of sample periods on historical tick data directly from my broker (a few gb per year per symbol).

The most complex math I've done in trading so far has been writing some R scripts to generate pretty graphs. It's a stretch to call that "math", though.

WFA completely changed the game for me. I was aware of curve fitting and tried to avoid it before, but after reading about WFA it was like the wool covering was removed from my eyes...

Looks like it was fixed a week ago?

https://github.com/doorkeeper-gem/doorkeeper/commit/c1b5c45e...

I share your envy and excitement.

I'm looking forward to dumping Go in favor of Rust once it's competitive in terms of libraries/stdlib. I've been building some big stuff in Go recently (mostly around financial market simulation) and the language shortcomings have hurt a lot. I've been using Go since January 2013 as my primary language, but everything I've seen of and tried with Rust is amazing.

The stated numbers are the costs of renouncing your citizenship. The state department drastically increased the cost last year.

I disabled AirDrop using the "defaults write" command, and now Safari loads things instantly! Holy crap!

Safari is borderline unusable for me on 10.9 and 10.10. It will literally take 30 seconds to load facebook.com. If I open Chrome or Firefox and try it, it loads instantly.

I've tried different DNS servers to no avail. I don't use Safari that often so I never bothered digging deeper.

What is the difference between the situations? All I remember of HipChat's change was the same thing: conversations would only be logged moving forward after a particular date (rather than a switch being flipped).

> Who should care if GPL is bad for a SSL library?

An entity which actually ships software?

Not being able to use redirects = non-starter. The first thing you learn when you work in the advertising industry is not to trust other people's metrics.

You've seen better performance on ext4 than XFS? The opposite has been my experience (mainly on 1tb data across 100 million rows, 20,000 queries/sec). btrfs + compression was 5x faster than XFS, but btrfs has nasty kernel deadlock bugs when the disk is almost full.

Got it. Thanks for replying.

What exactly is this script training? I don't understand what the input and output arrays are supposed to represent. It looks almost like an XOR search but the last output target isn't correct for that.

It's also pretty miserable even if you make decent money (mid-100s). Thankfully, I am headed for greener pastures in less than a week. Goodbye to the most dysfunctional and disgusting city I've ever lived in. Amazing place to gain work experience if you work in tech, but a horrible place to live.

Your productivity to potentially go down a lot.

Death.

More specifically, \A and \z are "start of string" and "end of string" respectively.

Why not \Z, you ask? \Z will match to the end of the string but ignore a trailing newline.

  irb(main):001:0> !!("hello\n" =~ /\Ahello\z/)
  => false
  irb(main):002:0> !!("hello\n" =~ /\Ahello\Z/)
  => true

Old-ass versions of Clang would build Ruby and PostgreSQL (client) binaries which would segfault upon execution. Try grabbing the latest XCode/command line tools package and you should be fine. I've been running Ruby 1.9.3 with Clang for quite a while.

brew install rbenv ruby-build; /* rc file shenanigans */; rbenv install 1.9.3-p327; rbenv global 1.9.3-p327; ruby --version

Posted on HN 49 minutes ago, closed as "not a real question" 48 minutes ago. Wow.

Neither do most fallacies.

Wow. They could have saved space and just said "(not White, Asian, or Indian)".

My guess is "50 Pence - In Da Pub"

It's cool that he got so much press in such a short time, but applauding technology choices that allowed him to sustain 8 requests per second (assuming this was over a 12 hour period) is ridiculous.

Post hoc ergo propter hoc, no?

In what way are they stuck on iOS?

  config.force_ssl = true

Feels good, man. If only it were that easy to enable HSTS in all web frameworks.

The image is only downloaded once, but each page you load re-requests it. If your account has enough karma to downvote posts, you're requesting two array gifs per page view.

There's no Expires header being set, so your browser is not caching these images. A full roundtrip to the HN server to get back the "content hasn't changed" status code (304) is required for each.

  user@brand-new-mac $ which rails
  /usr/bin/rails

What? OSX has shipped with (some version of) Rails since Leopard. You don't need to install a compiler or compile anything to use Rails on a Mac. It comes with sqlite3, too.

"I won't consider Ruby because I tried Rails once five years ago and it had scaling problems."

Looks like he didn't seriously consider Python or Ruby at all.

I am looking forward to the billboard on 101. If Basho and NewRelic can have one, so can GitHub.

Install the mentioned 4chanx extension. Hovering a quoted post ID will actually show the post, and you can also see/expand replies to a post in the top right.