JavaScript Array to String

Question

I'm using the jQuery plugin jQuery-Tokenizing-Autocomplete in a rails application with a has_many association.

I need to save the values to the database, but to do that I need it to be a string, not an array. So the result should equal "1","2","3". Hope this clarifies.

The javascript used to generate this array:

$.TokenList.ParseValue = function (value, settings) {
  var result = [];
  $.each(value, function(i, node) {
    if (node) {
      result.push(node.id);
    }
  });
  return result;  
};

Aj Banda · Accepted Answer · 2011-06-22 08:53:13Z

1

for array to string in javascript you can do it like this.

var str = (['1', '2', '3']).join(","); // will result to 1,2,3

similar syntax works for ruby code

['1', '2', '3']).join(",") # will return 1,2,3

answered Jun 22, 2011 at 8:53

Aj Banda

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Comments

Fred · Accepted Answer · 2010-08-07 01:35:42Z

0

The default separator for join is the comma, so remove the '","' argument. You are specifying a separator of "," so the double quotes must be escaped in the result string, hence the backslashes.

answered Aug 7, 2010 at 1:35

Fred

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5 Comments

Amund Over a year ago

That leaves me with "hotel_ids"=>["1,2,3"] and not the ["1","2","3"] that rails require.

Fred Over a year ago

Why not split the array into an array of separate strings back in the controller? Something like hotel_ids[0].split(',')

Fred Over a year ago

$ irb >> a = ["1,2,3"] => ["1,2,3"] >> a[0].split(',') => ["1", "2", "3"] >>

Amund Over a year ago

Great idea, would you happen to know the best way to make the array a string? the split method makes it an array. So the end result is [["1","2","3"]]. Thanks!

Fred Over a year ago

If you have an array or arrays, use the flatten method. [["1","2","3"]].flatten yields ["1","2","3"]

Casey Chu · Accepted Answer · 2010-08-07 21:30:56Z

0

var string = '"' + array.join('","') + '"'; // "1","2","3"

answered Aug 7, 2010 at 21:30

Casey Chu

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1 Comment

Amund Over a year ago

That works, except for the it getting escaped: "1\",\"2\",\"3"

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