payload: {"action":"opened","issue":{"url":"https://api.github.com/repos/JuliaComputing/TextParse.jl/issues/138","repository_url":"https://api.github.com/repos/JuliaComputing/TextParse.jl","labels_url":"https://api.github.com/repos/JuliaComputing/TextParse.jl/issues/138/labels{/name}","comments_url":"https://api.github.com/repos/JuliaComputing/TextParse.jl/issues/138/comments","events_url":"https://api.github.com/repos/JuliaComputing/TextParse.jl/issues/138/events","html_url":"https://github.com/JuliaComputing/TextParse.jl/issues/138","id":472225426,"node_id":"MDU6SXNzdWU0NzIyMjU0MjY=","number":138,"title":"Narrow column type","user":{"login":"cmcaine","id":6000761,"node_id":"MDQ6VXNlcjYwMDA3NjE=","avatar_url":"https://avatars3.githubusercontent.com/u/6000761?v=4","gravatar_id":"","url":"https://api.github.com/users/cmcaine","html_url":"https://github.com/cmcaine","followers_url":"https://api.github.com/users/cmcaine/followers","following_url":"https://api.github.com/users/cmcaine/following{/other_user}","gists_url":"https://api.github.com/users/cmcaine/gists{/gist_id}","starred_url":"https://api.github.com/users/cmcaine/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/cmcaine/subscriptions","organizations_url":"https://api.github.com/users/cmcaine/orgs","repos_url":"https://api.github.com/users/cmcaine/repos","events_url":"https://api.github.com/users/cmcaine/events{/privacy}","received_events_url":"https://api.github.com/users/cmcaine/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2019-07-24T11:17:20Z","updated_at":"2019-07-24T11:17:20Z","closed_at":null,"author_association":"NONE","body":"Related to #64 \r\n\r\nIf you read a csv with a column that is initially empty, TextParse.jl assigns that column a type of `Any`. I propose that the column type should either be narrowed to a union of the actual types used or that the initial type should be `Missing` and it should be promoted as in #64.\r\n\r\nComplete example\r\n\r\n```jl\r\nIOBuffer(\"\"\"\r\nfloatcol,mostlymissingcol\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,\r\n-1.,10.\r\n\"\"\") |> TextParse.csvread |> typeof\r\n\r\n# Returns\r\n# Tuple{Tuple{Array{Float64,1},Array{Any,1}},Array{String,1}}\r\n```\r\n"}}
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