Skip to content

Instantly share code, notes, and snippets.

Joshua Ulrich joshuaulrich

Block or report user

Report or block joshuaulrich

Hide content and notifications from this user.

Learn more about blocking users

Contact Support about this user’s behavior.

Learn more about reporting abuse

Report abuse
View GitHub Profile
@joshuaulrich
joshuaulrich / bcrypt-password.pl
Last active Feb 16, 2019 — forked from evandrix/gist:1076041
Check password against known hashed password and salt
View bcrypt-password.pl
#!/usr/bin/perl
# Usage: read -s PASSWORD && ./bcrypt-password.pl
use Crypt::Eksblowfish::Bcrypt;
# Read password and salt from environment variables
$password = $ENV{PASSWORD};
$salt = "lfVQ/T2N3dhFVvvPro2Hfu"
$encrypted = encrypt_password($password, $salt);
# Extract bcrypt version, cost, salt, and hashed password
@joshuaulrich
joshuaulrich / bench.R
Last active Mar 29, 2018 — forked from jimhester/bench.R
getOption benchmark
View bench.R
getOptionOld <- function(x, default = NULL) {
if(missing(default) || x %in% names(options()))
.Internal(getOption(x))
else
default
}
getOptionNew <- function(x, default = NULL) {
ans <- .Internal(getOption(x))
if(is.null(ans)) default else ans
@joshuaulrich
joshuaulrich / 10y-oscillator.R
Last active Aug 27, 2017 — forked from mbusigin/10y-oscillator.R
Generate chart with 10y yield oscillator (10y yield minus 260d moving average), +/- 1 stdev dashed lines
View 10y-oscillator.R
recplot <- function(var, rec.ind, maintitle = "", ylab = "", ylim = NULL)
{
# Give each recession a separate number, so we can split data by recession
# and calculate the necessary values to pass to addPolygon() for shading
r <- rle(as.integer(rec.ind))
r$values[r$values > 0] <- seq_len(sum(r$values))
rec <- xts(inverse.rle(r), index(rec.ind))
# Merge variable and recession data, as a left-join so we do not have
# observations that only exist in the recession indicator data
@joshuaulrich
joshuaulrich / output.txt
Created May 28, 2017 — forked from romainfrancois/output.txt
Extract promises and their environments from ...
View output.txt
> f <- function(...) {
+ promises(environment())
+ }
> g <- function(x = 3, ...) {
+ z <- 4
+ f(z = z, ..., x = x)
+ }
> h <- function(..., a = 2) {
@joshuaulrich
joshuaulrich / CBOE_csv_to_xts
Created Oct 19, 2012 — forked from jaredwoodard/CBOE_csv_to_xts
pulls csv files from the CBOE and converts them to xts
View CBOE_csv_to_xts
library(quantmod)
# we're pulling the Google VIX index (VXGOG) but this also works for VXAPL, VXGS etc.
# see http://www.cboe.com/micro/equityvix/introduction.aspx
url <- "http://www.cboe.com/publish/ScheduledTask/mktdata/datahouse/VXGOGDailyPrices.csv"
# use read.zoo to read the data directly into a zoo object
z <- read.zoo(url, header=TRUE, sep=",", skip=1, FUN=as.Date, format="%m/%d/%Y")
# convert to xts
View world indexes since 2008-06.r
require(quantmod)
#get index tickers without the ^ which we will add in the getSymbols
tckrs=c("GSPC","TNX","DJUBS","W3DOW","W5DOW")
#name the indexes
names(tckrs) <- c("S&P 500","US 10y Yld","DJ Commodity","Developed","Developing")
#use paste to add the ^ to the index tickers
getSymbols(paste("^",tckrs,sep=""), from="1986-01-01", to=Sys.Date())
You can’t perform that action at this time.