StevenJL

// You can use `transition` to change elements
// and `duration` to perform the transition over a period of time.

d3.selectAll("g.overallG")
  .select("circle")
  .transition()
  .duration(1000) 
  .attr("r", 
    function(p) { return radiusScale(d[datapoint]);}
  );

StevenJL

// LOADING CSV Data

// world_cup_data.csv
"team","region","win","loss","draw","points","gf","ga","cs","yc","rc"
"Netherlands","UEFA",6,0,1,18,12,6,2,23,1
"Spain","UEFA",6,0,1,18,8,2,5,8,0
"Germany","UEFA",5,0,2,15,16,5,3,10,1
"Argentina","CONMEBOL",4,0,1,12,10,6,2,8,0
"Uruguay","CONMEBOL",3,2,2,11,11,8,3,13,2
"Brazil","CONMEBOL",3,1,1,10,9,4,2,9,2

StevenJL

d3.select("svg")
  .selectAll("rect")
  .data([15, 50, 22, 8, 100, 10])
  .enter()
  .append("rect")
  .attr("width", 10)
  .attr("height", function(d) {return d;})
  .style("fill", "blue")
  .style("stroke", "red")
  .style("stroke-width", "1px")

StevenJL

// Casting
parseInt("77");
parseFloat("3.14159");
Date.parse("Sun, 22 Dec 2013 08:00:00 GMT");
"alpha,beta,gamma".split(",");

// Scaling
var conv = d3.scale
  .linear()
  .domain([500000,13000000])

StevenJL

/* Include these headers to start playing with c network functions */
#include <sys/socket.h>  /*  /usr/include/sys/socket.h on Mac OS */
#include <netinet/in.h>  /*  /usr/include/netinet/in.h on Mac OS */
#include <arpa/inet.h>   /*  /usr/include/arpa/inet.h on Mac OS */

// CREATING SOCKETS
int socket(int domain, int type, int protocol)
  /* 
      Creates a new user socket, returns a file descriptor for socket or -1 
      if it errors. This is defined in sys/socket.h

StevenJL

#include <stdio.h>
// for input output

#include <stdlib.h>
// general helper functions

#include <string.h>
// for manipulating arrays of characters

#include <unistd.h>

StevenJL

  int tcp_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  // AF_INET to create a IPv4 socket
  // SOCK_STREAM to use a stream-based protocol
  // IPPROTO_TCP to use the TCP protocol

  // if tcp_sock is -1, the socket failed to create
  if (tcp_sock < 0) {
    fputs("socket creation failed", stderr);
    exit(1);
  }

StevenJL

  int tcp_sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
  // AF_INET to create a IPv4 socket
  // SOCK_STREAM to use a stream-based protocol
  // IPPROTO_TCP to use the TCP protocol

  // we create a struct to store ip address data;
  struct sockaddr_in address_info;

  // zero out the data in the struct
  memset(&address_info, 0, sizeof(address_info));

StevenJL

// `const` creates an 'immutable variable', that is a variables which cannot be 
// re-assigned new content. Note this only makes the variable itself immutable, 
// not its assigned content (for instance, in case the content is an object, 
// this means the object itself can still be altered).
const PI = 3.14159;

// `let` creates a variable that is scoped to its nearest containing block.
// Compare this to `var` which scopes a variable to its nearest containing
// function.
let name = "Steve";

StevenJL

// Use the arrow notation to create anonymous functions

[1 , 3, 4, 5].map(v => v + 1)

evens = []
[1, 2, 3, 4, 5].forEach(v => {
  if (v % 2 == 0)
    evens.push(v)
})