soasme

vagrant@ubuntu-groovy:~$ sudo unshare --mount bash
root@ubuntu-groovy:/home/vagrant# ls /proc
1    115   1324  157  180  21   26   29   373    473  490    556    606    629    66620  682  83  9   97          bus       devices        fb           irq        kpagecgroup  meminfo  net           scsi      sys            uptime
10   116   1325  16   195  22   27   3    387    474  52538  558    617    635    66621  79   84  91  98          cgroups   diskstats      filesystems  kallsyms   kpagecount   misc     pagetypeinfo  self      sysrq-trigger  version
101  12    1398  17   196  229  273  30   39529  475  52557  56868  618    64015  66632  792  85  92  99          cmdline   dma            fs           kcore      kpageflags   modules  partitions    slabinfo  sysvipc        version_signature
102  121   1399  173  197  23   274  31   39530  476  54058  6      619    643    674    80   86  94  acpi        consoles  driver         interrupts   keys       loadavg      mounts   pressure      softirqs  thread-self    v

soasme

from cffi import FFI

ffi = FFI()
ffi.cdef("""
void *malloc(size_t size);

#define CLONE_NEWNS 0x00020000
#define CLONE_NEWCGROUP 0x02000000
#define CLONE_NEWUTS 0x04000000
#define CLONE_NEWIPC 0x08000000

soasme

package main

import (
	"archive/zip"
	"fmt"
	"io/ioutil"
	"os"
	"strings"
)

soasme

xxx = ts("xxx").align(’1m’, 'max')
yyy = ts('yyy').align(''1m', 'min')
zzz = add(xxx, yyy, groupby='region').rename('zzz')
zzz = xxx.pipe(add, yyy, groupby='region')
query(zzz, data)

soasme

live_loop :chords do
  play chord(:F, :major), amp: 2, sustain: 1
  sleep 2
  play chord(:G, :major), amp: 2, sustain: 1
  sleep 2
  play chord(:E, :minor), amp: 2, sustain: 1
  sleep 2
  play chord(:A, :minor), amp: 2, sustain: 1
  sleep 2
end

soasme

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

soasme

#!/usr/bin/env python

import os
import sys
import subprocess
from getpass import getpass
from pykeepass import PyKeePass

kp = PyKeePass(os.environ['VAULT_STORE_PATH'], password=os.environ.get('VAULT_STORE_PASSWORD') or getpass('password:'))
for entry in kp.entries:

soasme

Ansible playbook to setup HTTPS using Let's encrypt on nginx.

The Ansible playbook installs everything needed to serve static files from a nginx server over HTTPS.
The server pass A rating on [SSL Labs](https://www.ssllabs.com/).

To use:
 1. Install [Ansible](https://www.ansible.com/)
 2. Setup an Ubuntu 16.04 server accessible over ssh
 3. Create `/etc/ansible/hosts` according to template below and change example.com to your domain
 4. Copy the rest of the files to an empty directory (`playbook.yml` in the root of that folder and the rest in the `templates` subfolder)

soasme

import re, strutils, strformat, uri, tables, lists
import unicode except `strip`, `splitWhitespace`

type
  NodeObj*[T] = object
    parent*: Node[T]
    prev*: Node[T]
    next*: Node[T]
    head*: Node[T]
    tail*: Node[T]

soasme

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>

typedef enum {
    MONDAY_OK,
    MONDAY_ERR,
    MONDAY_RET,
    MONDAY_BRK,