Dataframes with wide columns have poor plain/text representations

[cstjean]

On a regular 80-column-wide terminal, printing a dataframe with a wide column yields this:

julia> DataFrame(name=["Tom", "Eric", "Adolph Blaine Charles David Earl Frederick Gerald Hubert Irvin John Kenneth Lloyd Martin Nero Oliver Paul Quincy Randolph Sherman Thomas Uncas Victor William Xerxes Yancy Zeus"], age=[10, 20, 30])
3×2 DataFrames.DataFrame
│ Row │ ├─────┼
│ 1   │ │ 2   │ │ 3   │ 

│ Row │ name                                                                                                                                                                              │
├─────┼───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
│ 1   │ "Tom"                                                                                                                                                                             │
│ 2   │ "Eric"                                                                                                                                                                            │
│ 3   │ "Adolph Blaine Charles David Earl Frederick Gerald Hubert Irvin John Kenneth Lloyd Martin Nero Oliver Paul Quincy Randolph Sherman Thomas Uncas Victor William Xerxes Yancy Zeus" │

│ Row │ age │
├─────┼─────┤
│ 1   │ 10  │
│ 2   │ 20  │
│ 3   │ 30  │

For comparison, pandas:

                                                name  age
0                                                Tom   10
1                                               Eric   20
2  Adolph Blaine Charles David Earl Frederick Ger...   30

Issues:

1. The first table looks irrelevant?
2. The second table doesn't respect the 80 characters limit.
3. I've seen some of the discussion behind splitting big dataframes into several tables, but perhaps the current show behavior would be more appropriate for showall?

[nalimilan]

Thanks to @bkamins it's better on master, though there's still the same visual glitch with the header:

julia> DataFrame(name=["Tom", "Eric", "Adolph Blaine Charles David Earl Frederick Gerald Hubert Irvin John Kenneth Lloyd Martin Nero Oliver Paul Quincy Randolph Sherman Thomas Uncas Victor William Xerxes Yancy Zeus"], age=[10, 20, 30])
3×2 DataFrames.DataFrame. Omitted printing of 2 columns
│ Row │ ├─────┼
│ 1   │ │ 2   │ │ 3   │ 

showall can be used to print everything, but it's not pretty. It would certainly make sense to truncate columns at a given proportion of the display size, like Pandas.

[swt30]

R's tibbles also print an extra line at the end that lists the omitted columns

... with N more variables: colName <type>, colName <type>...

which is quite nice.

[bkamins]

fixed on master