Create table directly from Hash

[vaibhavatul47]

It would be great to add support for data saved in array of hash. Eg:

users = [
  { name: "Foo", city: "XYZ", admin: true },
  { name: "Bar", zip: 987654, city: "ABC"}
]

table = TTY::Table.new(users)
renderer = TTY::Table::Renderer::Unicode.new(table)
renderer.render

Output:

#  ┌─────┬───────┬─────┬─────┐
#  │name │zip    │city │admin│
#  ├─────┼───────┼─────┼─────┤
#  │Foo  │       │XYZ  │✔    │
#  │Bar  │987654 │ABC  │     │
#  └─────┴───────┴─────┴─────┘

Current implementation expects each header to have value defined for each row. If values are not available then it is to be replaced by nil. For above example sample input would be:

users = [ {
  name:  ["Foo", "Bar"],
  zip:   [nil, 987654],
  city:  ["XYZ", "ABC"],
  admin: [true, nil]
} ]

I can submit a PR if required.

[slowbro]

Hi @vaibhavatul47; if you have a patch for this completed already, let me know - otherwise I may tackle this.

[vaibhavatul47]

I had it somewhere on my machine, I'll share the patch shortly.

[dishcandanty]

I know this is old, but @vaibhavatul47 this would be super nice to have :)

[MadBomber]

No change to the library is required. It has established its contract w/r/t its API. Just convert your data to match the contract like this:

#!/usr/bin/env ruby
# convert_hash_to_data.rb

require 'tty-table'

headers = [:key1, :key2, :key3]

array_of_hashes = [
  {
    key1: 'one',
    key2: 'two'
  },
  {
    key1: 'one',
    key2: 'two',
    key3: 'three'
  },
  {
    key2: 'two',
    key3: 'three'
  },
  {
    key3: 'three'
  }
]

def convert_hash_to_data(headers, array_of_hashes)
  data = []
  array_of_hashes.each do |entry|
    row = []
    headers.each do |key|
      row << entry[key]
    end
    data << row
  end

  data
end

data = convert_hash_to_data(headers, array_of_hashes)

table = TTY::Table.new(headers, data)
puts table

__END__

produces this output ...

key1 key2 key3
one  two
one  two  three
     two  three
          three