bitcoin

Closed. This question is off-topic. It is not currently accepting answers. Learn more . Want to improve this question? Update the question so it's on-topic for Stack Overflow. To keen downvoters and/or closers: If you think this is offtopic for SO, kindly point me out other StackExchange site where this question would be more appropriate. How to implement ECDSA curve secp256k1 in PHP? Or rather: Are there any solutions - ie. includable specialized classes - already done? I can see there are plenty of opensource libraries, classes and stuff available for other languages (JavaScript, Python,...)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am trying to extract human names from text. Does anyone have a method that they would recommend? This is what I tried (code is below): I am using nltk to find everything marked as a person and then generating a list of all the NNP parts of that person. I am skipping persons where there is only one NNP which avoids grabbing a lone surname. I am getting decent results but was wondering if there are better ways to go about solving this problem. Code: import nltk from nameparser.parser import HumanName def get_human_names(text): tokens = nltk

The cryptocurrency has always been a typical representative of the bubble economy. Since last month, the price of Bitcoin has continued to fall, and the current situation has fallen below 6,000 US dollars. Although it has risen slightly, it has just risen by 6,000. It is not expected that it will rise. Soon to recover, coupled with South Korea's cryptocurrency exchange, Coinrail, said that its system has been "invasion of the network" and may even continue to decline. So what are the reasons that caused the price of bitcoin to continue to fall recently? I think there are the following reasons:

Although Bitcoin has been called the world's first "global cryptocurrency," it is still illegal in some countries and has been banned by the government. According to Coin.dance's data, currently 11 countries consider bitcoin transactions illegal, and most of these are concentrated in third-world countries. Bitcoin in 107 countries or regions is “unrestricted” in 251 countries or regions around the world. Nearly half of these countries are Muslims. “Unrestricted” means that Bitcoin is considered legal by the government. , Or there is no clear limit on the use of cryptocurrencies. Smart

1.Bitcoin The pricing of Bitcoin is quiet scary, as we mentioned on Saturday, the price curve slumped and then continued to vary around a lower price range, about $7300-$7500. However, by the time of writing(15:06 Beijing) the real time price of Bitcoin fell to $7,218.67 USD, and even fell down to $7,198 about an hour ago, a new-low in the past month. Moreover, the curve today is completely random, showing its feature of volatility in price. 2.LightChain, CKUSD,Gems Then, the downward trend move in price seems to be contagious, for tokens , more or less, are all influence by the price

Bitcoin序列化库使用 Bitcoin序列化功能主要实现在 serialize.h 文件，整个代码主要是围绕 stream 和参与序列化反序列化的类型 T 展开。 stream这个模板形参表达具有 read(char**, size_t) 和 write(char**, size_t) 方法的对象， 类似Golang 的io.reader ,io.writer。 简单的使用例子： #include <serialize.h> #include <streams.h> #include <hash.h> #include <test/test_bitcoin.h> #include <stdint.h> #include <memory> #include <boost/test/unit_test.hpp> BOOST_FIXTURE_TEST_SUITE(serialize_tests, BasicTestingSetup) struct student { std::string name; double midterm, final ; std::vector<double> homework; ADD_SERIALIZE_METHODS; template <typename Stream, typename Operation> inline void

On May 23th, Tom Lee, the co-founder of Fundstrat, said to CNBC in a email that the Bitcoin price will reach $25,000 for three reasons.However, before we really look into the reasons, it’s necessary for us to get a glimpse at the current price graph showing the data and how the Bitcoin price change. According to data from citicoins.com , the current price of Bitcoin stands at $7,449.36, far much lower than the so-called $25,000, and the curve seems rather volatile, with the high stood at more than $9,600, almost hitting the mark of $10,000 and the low at less than $7,500. It also shows a trend

（署名：刘杰良） 适用于最新的 EOS Dawn 4.0/4.1 最近在研究 EOS 的 RPC API，但是由于官方API文档的不够详尽，新建账号（new account）这一个操作就折腾了一个多星期。皇天不负有心人，终于调通了新建账号，代币转账也轻松解决。特地写这篇文章（适用于 EOS dawn 4.0 和 4.1），帮助准备使用 EOS RPC 做 Dapp 开发的朋友，如有问题，欢迎批评指正。 1、POST http://127.0.0.1:8888/v1/chain/abi_json_to_bin （序列化新建账号的 json） { "code" : "eosio" , "action" : "newaccount" , "args" : { "creator" : "bitcoin" , "name" : "eason" , "owner" : { "threshold" : 1 , "keys" : [ { "key" : "EOS4ufZoTw95yHJS6Cyz3h4w5a2W4cyYpMYRnd7gbFZuCfPxUFS6r" , //owner public key "weight" : 1 } ], "accounts" : [], "waits" : [] }, "active" : { "threshold" : 1 , "keys" : [ {

https://bitcoincore.org/bitcoin.pdf 转载请标明出处: Bitcoin: A Peer-to-Peer Electronic Cash System 文章来源: Bitcoin: A Peer-to-Peer Electronic Cash System

#环境 ubuntu 16.4 #硬盘500GB #截止2018-12-31磁盘占用超过230GB #下载页面 #https://bitcoin.org/zh_CN/download cd /opt/ wget https://bitcoin.org/bin/bitcoin-core-0.17.0.1/bitcoin-0.17.0.1-x86_64-linux-gnu.tar.gz #解压,软连接 tar zxf bitcoin-0.17.0.1-x86_64-linux-gnu.tar.gz ln -fs /opt/bitcoin-0.17.0 /opt/bitcoin ln -fs /opt/bitcoin-0.17.0/bin/bitcoind /usr/local/bin/bitcoind ln -fs /opt/bitcoin-0.17.0/bin/bitcoin-cli /usr/local/bin/bitcoin-cli mkdir -p /data/btc_data mkdir ~/.bitcoin vim ~/.bitcoin/bitcoin.conf # ~/.bitcoin/bitcoin.conf datadir=/data/btc_data dbcache=10240 txindex=1 rpcuser=btc rpcpassword=btc2018