Analysis of Julia usage in StackOverflow Developer Survey 2017

devsurv.jl

using Requests
using StatsBase

const URL = "https://drive.google.com/uc?export=download&id=0B6ZlG_Eygdj-c1kzcmUxN05VUXM"
const ZNAME =  "developer_survey_2017.zip"
const DNAME = "survey_results_public.csv"

function load()
    isfile(DNAME) && return
    if !isfile(ZNAME)
        println("fetching data ...")
        save(get(URL), ZNAME)
    end
    println("unzipping ...")
    run(`unzip $ZNAME $DNAME`) # change to whatever unzip you have
end

cmap(lang, period) = countmap(vcat(filter(x-> lang in x, dss[:,period])...))

function pstats(period)
    println("\n*** ", period == 1 ? "Used:" : "Wants to use:")
    @printf("Julia:  %.2f\n", 100mean(jdss[:, period]))
    println("With Julia")
    for l in jul[period][2:end]
        println("  ", rpad(l.first,12), round(100l.second/jul[period][1].second))
    end
    println("From language:")
    for b in both
        cm = cmap(b, period)
        println("  ", rpad(b,12), round(100cm["Julia"]/cm[b]))
    end
end

load()
ds = readcsv(DNAME)[2:end, 89:90]
dss = split.(ds, "; ")
jdss = in.("Julia", dss)

jul = [sort(collect(cmap("Julia", i)), lt=(a,b)->a[2]>b[2])[1:9] for i in 1:2]
both = sort(intersect(first.(jul[1][2:end]), first.(jul[2][2:end])))
foreach(pstats, 1:2)