dom96

import selectors, net

type
  Data = ref object of RootRef
    someData: string

var selector = newSelector()
var sock = newSocket()
# The {} means "Don't notify me about any events for this sock", the sock is still registered though
selector.register(sock, {}, Data(someData: "Blah blah"))

dom96

import
  asyncdispatch, asyncnet, htmlparser, xmltree, httpclient, strutils,
  strtabs, streams, uri, sets

var visited = initSet[string]()

proc crawl(url: string, client: PAsyncHttpClient = newAsyncHttpClient()) {.async.} =
  if url in visited: return # Already visited this URL.
  echo("Crawling ", url)
  visited.incl(url)

dom96

import macros, strutils

type
  TokenKind = enum
    FInt, FString, Text

  Token = object
    case kind: TokenKind
    of FInt, FString: nil
    of Text: c: String

dom96

## Module for handling and raising signals. Wraps ``<signals.h>``.

type
  TSignal = enum
    SIGINT = 2

proc signal*(sig: cint, func: pointer) {.importc: "signal", header: "<signal.h>".}

template atSignal*(s: TSignal, actions: stmt): stmt = 
  proc callback(sig: cint) =

dom96

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.

dom96

import macros

macro replace(node: untyped): untyped =
  result = node
  # StmtList
  #   Command
  #     Ident ident"echo"
  #     IntLit 42
  result[0][1] = newStrLitNode("Hello World")

dom96

#? braces

proc main() {
  echo("Hello");
}

when (isMainModule) {
  main();
}

dom96

root@ubuntu-512mb-nyc3-01:~# curl https://nim-lang.org/choosenim/init.sh -sSf | sh
choosenim-init: Downloading choosenim-0.2.2_linux_amd64
      Info: Nim 0.17.2 already downloaded
 Extracting nim-0.17.2.tar.gz
   Building Nim 0.17.2
   Building tools (nimble, nimgrep, nimsuggest)
 Exception: Execution failed with exit code 1
        ... Command: ./koch tools -d:release
        ... Output: bin/nim c --noNimblePath -p:compiler -d:release -o:bin/nimsuggest nimsuggest/nimsuggest.nim
        ... Hint: used config file '/root/.choosenim/toolchains/nim-0.17.2/config/nim.cfg' [Conf]

dom96

import dom

type
  CanvasRenderingContext* = ref object
    fillStyle* {.importc.}: cstring
    strokeStyle* {.importc.}: cstring
    width* {.importc.}: int
    height* {.importc.}: int

    shadowColor* {.importc.}: cstring

dom96

var respChan: Channel[(string, string)]
var handlers: Table[string, proc (response: string)]

proc httpLoop() {.async.} =
  while true:
    let (received, resp) = respChan.tryRecv()
    if received:
      handlers[resp[0]](resp[1])
    await sleepAsync(1000)