CODEWITHSUNDEEP
ruby-on-railsarraysrubysplitruby-on-rails-5
Sylar
Sylar

Reputation: 12072

Split on second comma in ruby

Apologies for the "not so great questions". This happens when your eyes are closed but your brain keeps thinking about code.

This bit puzzles me. I want to split a string on a comma to make it an array, OR..., if I can send to my controller the array then perfect but anything I do never seem to work so what may work is to split on the second comma in a string.

I have a state array that looks like this: enter image description here

So when I use params[:file].split(",") I get a handle error for data:image/jpeg;base64 because it splits on the first comma when the code itself it correct. A stupid question, can you split on the second comma in ruby?

The array is like: ["data:image/jpeg;base64,/9j/xxxxxx,data:image/jpeg;base64,/9j/xxxxxx"]

My input looks like this and I have tried many variations with file[], file[][]

<input type="hidden" name="file" value={this.state.files} />

I've used concat to get the array.

Upvotes: 0

Views: 930

Answers (4)

Cary Swoveland
Cary Swoveland

Reputation: 110675

str = "Now is the time for citizens, every last one, to revolt, without delay."

i1 = str.index(',') 
i2 = i1 + 1 + str[i1+1..-1].index(',')
[str[0..i2-1], str[i2+1..-1]]
  # => ["Now is the time for citizens, every last one",
  #     "to revolt, without delay."]

Upvotes: 0

nobilik
nobilik

Reputation: 736

result = []
incoming_data.gsub(/"data:\S+"/) {|member| result << member}

maybe this way...

Upvotes: 0

Gosha A
Gosha A

Reputation: 4570

You could also serialize the files array in a different manner before sending to Rails.

What does the code that sends files look like?

If anything, can you join it like this, with some unique separator?

makeRequest({ file: this.state.files.join('---') });

And then split with that in Ruby

params[:file].split('---')

Upvotes: 3

Thao Hoang
Thao Hoang

Reputation: 51

params[:files].split(",").each_slice(2).map { |top| "#{top.first},#{top.last}"}

Basically you can split by "," as normal but then merge every two elements together : )

str = '["data:image/jpeg;base64,/9j/xxxxxx,data:image/jpeg;base64,/9j/xxxxxx"]'
str.split(",").each_slice(2).map{ |top| "#{top.first},#{top.last}"}
 => ["[\"data:image/jpeg;base64,/9j/xxxxxx", "data:image/jpeg;base64,/9j/xxxxxx\"]"]

Upvotes: 1

Related Questions