jsundram

Initial impressions of Julia coming from Python (and C++, JavaScript ...)

• Call for Proposals due March 23.*

Surprises / Gotchas

• 1-based indexing?? in 2021? I thought this battle was over. Esp with C/Python FFI, it's a weird choice.
• installing packages is weird. open up the repl, type ], and then "add X", or import Pkg; Pkg.add("X")?
• Manifest.toml is cool but a bit non-obvious to figure out how to update it.
• methods on objects vs methods that take objects. I get it, but less discoverable. e.g. haskey(mydict, "a") instead of has_key?
  • methodswith(Dict) is a nice workaround (but also isn't itself discoverable!)
• methodswith doesn't return sorted results! You need sort(methodswith(Dict), by=m->m.name) or methodswith(Dict, Base) to exclude other mod. And this actually doesn't include values or keys unless you do methodswith(Dict, Base; supertypes=true) (thanks [discourse](https://discourse.julialang.org/t/can-methodswith-return-

jsundram

from datetime import datetime
from dateutil import parser
import csv
import json
import requests


def id_for_page(page):
    """Uses the wikipedia api to find the wikidata id for a page"""
    api = "https://en.wikipedia.org/w/api.php"

jsundram

import Colors
using DataStructures
using ImageSegmentation
using LightGraphs
using MetaGraphs

# idea from  https://vcansimplify.wordpress.com/2014/08/17/hierarchical-merging-of-region-adjacency-graphs/

function _weight_mean_color(data::MetaGraph, n1::Int, n2::Int)::Real
    # Determine weight of an edge between n1 and n2

jsundram

from skimage import io
import argparse
import glob
import numpy as np
import os


def make_frames(files, outdir, n=8, prefix="composite"):
    split = int(len(files) / n)
    pathstart = os.path.join(outdir, prefix)

jsundram

function history()
    map(sort(collect(keys(IJulia.In)))) do k
        println(k, ": ", IJulia.In[k])
    end;
    return Nothing;
end

jsundram

function super(a)
    local t
    try 
        t = supertype(a)
    catch 
        t = typeof(a)
    end
   
    
    if t == a

jsundram

#!/bin/bash
# Adapted from https://stackoverflow.com/questions/6118948/bash-loop-ping-successful.
# Network connection mysteriously dies; ping every N seconds, and if ping fails
# turn wifi off and on again, which seems to fix it. 

echo "run this script with sudo!"
echo "Starting ..."

DOWN=0
while true; do

jsundram

# forked from https://gist.github.com/bradp/bea75b16d3325f5c47d4
# usage: 
# 1) attach ssd to old machine and start running backup.sh
# 2) grab the latest version of this file from 	
#   https://gist.github.com/jsundram/eeca472a8929bfab27209783b16bd6d9
# 3) copy this script onto the new machine and start running it
#   sh setup.sh
#   you will need to add homebrew to your .zprofile path
#   PATH=$PATH:/opt/homebrew/bin
#   echo 'export PATH="/opt/homebrew/bin:$PATH"' >> ~/.zprofile

jsundram

from datetime import datetime, timedelta
import random

import matplotlib.pyplot as plt
import matplotlib.dates as dates


def make_data():
    random.seed(0)  # Make it repeatable
    s = datetime(2020, 1, 1)  # Pick a leap year!

jsundram

from collections import defaultdict
import networkx as nx
import string
import matplotlib.pyplot as plt


def get_words(filename='/usr/share/dict/words'):
    d = defaultdict(set)
    with open(filename) as f:
        for line in f: