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josh bowles jbowles

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@jbowles
jbowles / gocql_cassandra_example.go
Last active November 17, 2021 12:55
Cassandra and gocql quick start
/*
* Assuming a schema similar to the Cassandra wiki quick start (http://wiki.apache.org/cassandra/GettingStarted):
* CREATE TABLE mykeyspace.users (
* user_id int PRIMARY KEY,
* fname text,
* lname text,
* user_id int
* )
*
* RETURNs THIS:
@jbowles
jbowles / node_centos_install
Created June 12, 2012 17:20
Install Node.js on CentOS
# this is a work in progress!!
######################################################
# I'm on a CentOS dev VM provided by my company #
######################################################
#uname -a
#Linux ------- 2.6.18-128.el5 ----- x86_64 x86_64 x86_64 GNU/Linux
# OR
#cat /proc/version
#Linux version 2.6.18-128.el5 (mockbuild@builder10.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-44)) ----
@jbowles
jbowles / ratcliff_obershelp_with_token_sort.rs
Created May 9, 2019 15:00
/*
RatcliffObserhelp distance
SEE tokenizer
[NIST Ratcliff/Obershelp pattern recognition](https://xlinux.nist.gov/dads/HTML/ratcliffObershelp.html):
Compute the similarity of two strings as the number of matching characters divided by the total number of characters in the two strings.
Matching characters are those in the longest common subsequence plus, recursively, matching characters in the unmatched region on either side of the longest common subsequence.
*/
@jbowles
jbowles / working_luhn_rust.rs
Created September 18, 2018 13:33
working_luhn_rust
//Luhn trait
pub trait Luhn {
fn luhn(self) -> bool;
}
impl Luhn for String {
fn luhn(self) -> bool {
let s = remove_whitespace(&self);
let d = Digits::digits(s);
if d.len() < 16 {
return false;
@jbowles
jbowles / luhn_4_styles_julia.jl
Last active July 5, 2018 16:34
luhn in julia, 4 styles
using BenchmarkTools
dbl2nd(da::Array{Int64,1}) = for i in 1:2:(length(da))
da[i] *= 2
end
mod9(da::Array{Int64,1}) = for i in 1:2:length(da)
if da[i] > 9
da[i] -= 9
end
@jbowles
jbowles / cz_ue_world_data_enrollment.fsx
Last active December 10, 2017 15:29
From the fslabbasic template get world bank data (updated version of the fslab.org getting started example)
#load "../packages/FsLab/FsLab.fsx"
(* My Environment
visual studio code 2017 Version 1.18.1
mono --version ‹2.4.1›
Mono JIT compiler version 5.4.1.7 (2017-06/e66d9abbb27 Wed Oct 25 12:10:41 EDT 2017)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
TLS: normal
SIGSEGV: altstack
@jbowles
jbowles / fibonacci_two_ways.ex
Created December 3, 2014 16:00
tail call optimizations through pattern matching in elixir
defmodule Mather do
def numbers(x,y) do
f = fn
x,y when x>0 -> x + y
x,y -> x*y
end
IO.puts f.(x,y)
end
# A tail call optimized fibonacci.
@jbowles
jbowles / go1.2_brew_install_hack_for_lazy_and_impatient.rb
Created December 1, 2013 23:33
Too lazy and impatient
# Too lazy to make a pull request and too impatient to wait,
# Just tuck 1.2 into the devel version
## First,
## $brew unlink go
## $vim /usr/local/Library/Formula/go.rb
## around line 20 under the `devel' block edit the following
devel do
#url 'https://go.googlecode.com/files/go1.2rc5.src.tar.gz'
#version '1.2rc5'
@jbowles
jbowles / mstatus.go
Last active December 29, 2015 18:59
gobike MStatus struct using with megajson experiment
package gobike
/*
Example JSON:
{
"HTTPStatus":200,
"TimeLocal":"2013-11-29T18:43:59.674946633-07:00",
"TimeUTC":"2013-11-30T01:43:59.674946695Z",
"URL":{
"Scheme":"",
@jbowles
jbowles / mstatus_decoder.go
Created November 30, 2013 02:21
Generated code from megajson on MStatus struct
package gobike
import (
"errors"
"fmt"
"github.com/benbjohnson/megajson/scanner"
"io"
)
type MStatusJSONDecoder struct {