This has moved to https://github.com/bitcoin/bitcoin/blob/master/doc/reduce-memory.md
Shooter liushooter
laanwj
/ reducing-bitcoind-memory-usage.md
Last active
August 28, 2022 09:44
Reducing bitcoind memory usage
jasonlvhit
/ 尾递归、Lua、Python、C和编译器优化.md
Last active
September 23, 2022 02:33
这两天过了遍Lua，Lua的一个语言特性是支持尾递归，这是我接触的第一个支持尾递归的语言（尾递归优化）
尾递归，是尾调用的一种类型，后者更加准确，因为实际的正确尾递归（Proper Tail Recursion）是不涉及递归的。尾调用是指一个函数里的最后一个动作是一个函数调用的情形：即这个调用的返回值直接被当前函数返回的情形。这种情形下称该调用位置为尾位置。若这个函数在尾位置调用本身（或是一个尾调用本身的其他函数等等），则称这种情况为尾递归，是递归的一种特殊情形。尾调用不一定是递归调用，但是尾递归特别有用，也比较容易实现。
我们直接的来看一下Lua中尾调用：
function f(x)
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| # Updated for Ruby 2.3 | |
| string_t = None | |
| def get_rstring(addr): | |
| s = addr.cast(string_t.pointer()) | |
| if s['basic']['flags'] & (1 << 13): | |
| return s['as']['heap']['ptr'].string() | |
| else: | |
| return s['as']['ary'].string() |
wbroek
/ genymotionwithplay.txt
Last active
February 12, 2024 03:22
Genymotion with Google Play Services for ARM
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| NOTE: Easier way is the X86 way, described on https://www.genymotion.com/help/desktop/faq/#google-play-services | |
| Download the following ZIPs: | |
| ARM Translation Installer v1.1 (http://www.mirrorcreator.com/files/0ZIO8PME/Genymotion-ARM-Translation_v1.1.zip_links) | |
| Download the correct GApps for your Android version: | |
| Google Apps for Android 6.0 (https://www.androidfilehost.com/?fid=24052804347835438 - benzo-gapps-M-20151011-signed-chroma-r3.zip) | |
| Google Apps for Android 5.1 (https://www.androidfilehost.com/?fid=96042739161891406 - gapps-L-4-21-15.zip) | |
| Google Apps for Android 5.0 (https://www.androidfilehost.com/?fid=95784891001614559 - gapps-lp-20141109-signed.zip) |
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| if 64 - 64: i11iIiiIii | |
| if 65 - 65: O0 / iIii1I11I1II1 % OoooooooOO - i1IIi | |
| if 73 - 73: II111iiii | |
| if 22 - 22: I1IiiI * Oo0Ooo / OoO0O00 . OoOoOO00 . o0oOOo0O0Ooo / I1ii11iIi11i | |
| import os | |
| if 48 - 48: oO0o / OOooOOo / I11i / Ii1I | |
| if 48 - 48: iII111i % IiII + I1Ii111 / ooOoO0o * Ii1I | |
| if 46 - 46: ooOoO0o * I11i - OoooooooOO | |
| if 30 - 30: o0oOOo0O0Ooo - O0 % o0oOOo0O0Ooo - OoooooooOO * O0 * OoooooooOO | |
| if 60 - 60: iIii1I11I1II1 / i1IIi * oO0o - I1ii11iIi11i + o0oOOo0O0Ooo |
Sjors
/ bitcoin-pay.rb
Last active
April 9, 2024 16:50
This script demonstrates how a bitcoin transaction is created and signed. Just pass in your own address and private key and it will prepare a transaction for you. You can then copy & paste that transaction into a webservice like Blockchain to send it. I wrote this mostly to understand better how it works. I sometimes had to "cheat" and look at t…
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| #!/usr/bin/env ruby | |
| require 'open-uri' | |
| require 'JSON' | |
| require 'digest/sha2' | |
| require 'pry' | |
| require 'bigdecimal' | |
| require 'bitcoin' # Because I need to cheat every now and then | |
| # Usage: | |
| # gem install pry json ffi ruby-bitcoin |
STRd6
/ jquery.paste_image_reader.js
Created
April 1, 2013 17:38
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| // Created by STRd6 | |
| // MIT License | |
| // jquery.paste_image_reader.js | |
| (function($) { | |
| var defaults; | |
| $.event.fix = (function(originalFix) { | |
| return function(event) { | |
| event = originalFix.apply(this, arguments); | |
| if (event.type.indexOf('copy') === 0 || event.type.indexOf('paste') === 0) { | |
| event.clipboardData = event.originalEvent.clipboardData; |
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| # A sample Gemfile | |
| source "https://rubygems.org" | |
| gem 'rubix' | |
| gem 'zabbixapi' | |
| gem 'zabby' | |
| gem 'zbxapi' |
gavinandresen
/ TwoOfThree.sh
Last active
May 5, 2024 19:57
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| # Raw transaction API example work-through | |
| # Send coins to a 2-of-3 multisig, then spend them. | |
| # | |
| # For this example, I'm using these three keypairs (public/private) | |
| # 0491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f86 / 5JaTXbAUmfPYZFRwrYaALK48fN6sFJp4rHqq2QSXs8ucfpE4yQU | |
| # 04865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a986818a7cb624532f062c1d1f8722084861c5c3291ccffef4ec6874 / 5Jb7fCeh1Wtm4yBBg3q3XbT6B525i17kVhy3vMC9AqfR6FH2qGk | |
| # 048d2455d2403e08708fc1f556002f1b6cd83f992d085097f9974ab08a28838f07896fbab08f39495e15fa6fad6edbfb1e754e35fa1c7844c41f322a1863d46213 / 5JFjmGo5Fww9p8gvx48qBYDJNAzR9pmH5S389axMtDyPT8ddqmw | |
| # First: combine the three keys into a multisig address: | |
| ./bitcoind createmultisig 2 '["0491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f86","04865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a9 |