error while loading shared libraries: libnss3.so: cannot open shared object file: No such file or directory
sudo apt-get install libnss3error while loading shared libraries: libXss.so.1: cannot open shared object file: No such file or directory
sudo apt-get install libxss1
| #include <time.h> // Robert Nystrom | |
| #include <stdio.h> // @munificentbob | |
| #include <stdlib.h> // for Ginny | |
| #define r return // 2008-2019 | |
| #define l(a, b, c, d) for (i y=a;y\ | |
| <b; y++) for (int x = c; x < d; x++) | |
| typedef int i;const i H=40;const i W | |
| =80;i m[40][80];i g(i x){r rand()%x; | |
| }void cave(i s){i w=g(10)+5;i h=g(6) | |
| +3;i t=g(W-w-2)+1;i u=g(H-h-2)+1;l(u |
The response to my first few posts has been much larger than I’d imagined and I’d like to thank everyone for the encouragement.
If you’re interested in building a trading system I recommend first reading my previous post on general ideas to keep in mind.
My first really technical post will be on how to build a limit order book, probably the single most important component of a trading system. Because the data structure chosen to represent the limit order book will be the primary source of market information for trading models, it is important to make it both absolutely correct and extremely fast.
To give some idea of the data volumes, the Nasdaq TotalView ITCH feed, which is every event in every instrument traded on the Nasdaq, can have data rates of 20+ gigabytes/day with spikes of 3 megabytes/second or more. The individual messages average about 20 bytes each so this means handling
| package main | |
| import ( | |
| "net/http" | |
| "compress/gzip" | |
| "io/ioutil" | |
| "strings" | |
| "sync" | |
| "io" | |
| ) |
| package main | |
| import ( | |
| "encoding/json" | |
| "fmt" | |
| ) | |
| func main() { | |
| b := []byte(`{"key":"value"}`) |
| version: '3' | |
| services: | |
| app: | |
| image: nginx:alpine | |
| ports: ["80:80"] | |
| restart: unless-stopped | |
| restarter: | |
| image: docker:cli | |
| volumes: ["/var/run/docker.sock:/var/run/docker.sock"] |
| # -*- coding: utf-8 -*- | |
| """ rwlock.py | |
| A class to implement read-write locks on top of the standard threading | |
| library. | |
| This is implemented with two mutexes (threading.Lock instances) as per this | |
| wikipedia pseudocode: | |
| https://en.wikipedia.org/wiki/Readers%E2%80%93writer_lock#Using_two_mutexes |
| # prettyprint json i jinja | |
| def ppjson(value, indent=2): | |
| return json.dumps(value, indent=indent) | |
| jinja2.filters.FILTERS['ppjson'] = ppjson |
Написать сервис, который будет слушать входящие запросы по HTTP, преобразовывать их в запрос к соответствующей функции Postgres, выполнять запрос и возвращать ответ клиенту.
Дописать функции Postgres для сервиса.
/Скиллы: Golang, Postgres, regexp, строки, работа с json в Golang и Postgres/
