How to change hash keys from `Symbol`s to `String`s?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}
I am using Ruby on Rails 3.2.2 and I would like to "easily" / "quickly" change hash keys from Symbols to Strings. That is, from {:one => "Value 1", :two => "Value 2", ...} to {"one" => "Value 1", "two" => "Value 2", ...}.
How can I make that by using less code as possible?
ruby-on-rails ruby ruby-on-rails-3 hash
asked May 11 '12 at 10:20
user12882user12882
1,90393050
add a comment |
I am using Ruby on Rails 3.2.2 and I would like to "easily" / "quickly" change hash keys from Symbols to Strings. That is, from {:one => "Value 1", :two => "Value 2", ...} to {"one" => "Value 1", "two" => "Value 2", ...}.
How can I make that by using less code as possible?
ruby-on-rails ruby ruby-on-rails-3 hash
asked May 11 '12 at 10:20
user12882user12882
1,90393050
5
If you used HashWithIndifferentAccess instead of a hash, then that would be done automatically for you.
– Mark Thomas
May 11 '12 at 10:46
add a comment |
I am using Ruby on Rails 3.2.2 and I would like to "easily" / "quickly" change hash keys from Symbols to Strings. That is, from {:one => "Value 1", :two => "Value 2", ...} to {"one" => "Value 1", "two" => "Value 2", ...}.
How can I make that by using less code as possible?
ruby-on-rails ruby ruby-on-rails-3 hash
asked May 11 '12 at 10:20
user12882user12882
1,90393050
I am using Ruby on Rails 3.2.2 and I would like to "easily" / "quickly" change hash keys from Symbols to Strings. That is, from {:one => "Value 1", :two => "Value 2", ...} to {"one" => "Value 1", "two" => "Value 2", ...}.
How can I make that by using less code as possible?
ruby-on-rails ruby ruby-on-rails-3 hash
ruby-on-rails ruby ruby-on-rails-3 hash
asked May 11 '12 at 10:20
user12882user12882
1,90393050
asked May 11 '12 at 10:20
user12882user12882
1,90393050
edited May 11 '12 at 10:28
user12882
asked May 11 '12 at 10:20
user12882user12882
1,90393050
asked May 11 '12 at 10:20
user12882user12882
1,90393050
asked May 11 '12 at 10:20
user12882user12882
1,90393050
1,90393050
5
If you used HashWithIndifferentAccess instead of a hash, then that would be done automatically for you.
– Mark Thomas
May 11 '12 at 10:46
add a comment |
5
If you used HashWithIndifferentAccess instead of a hash, then that would be done automatically for you.
– Mark Thomas
May 11 '12 at 10:46
5
5
If you used HashWithIndifferentAccess instead of a hash, then that would be done automatically for you.
– Mark Thomas
May 11 '12 at 10:46
If you used HashWithIndifferentAccess instead of a hash, then that would be done automatically for you.
– Mark Thomas
May 11 '12 at 10:46
add a comment |
7 Answers
7
active
oldest
votes
simply call stringify_keys (or stringify_keys!)
http://apidock.com/rails/Hash/stringify_keys
answered May 11 '12 at 10:31
Viktor TrónViktor Trón
7,04224046
5
Be careful with this one.. it does not work recursively.
– baash05
Apr 8 '13 at 3:12
15
deep_stringify_keysis recursive, but I believe it's only in Rails 4: apidock.com/rails/v4.0.2/Hash/deep_stringify_keys
– Romain Paulus
Feb 21 '14 at 23:49
Thanks @RomainPaulus! that helped!
– Dorian
Mar 16 '15 at 19:21
add a comment |
Use stringify_keys/stringify_keys! methods of the Hash class.
You can also use some_hash.with_indifferent_access to return a Hash instance where your key can be specified as symbols or as strings with no difference.
answered May 11 '12 at 10:30
jdoejdoe
14.4k23844
add a comment |
stringify_keys is nice, but only available in Rails.
Here's how I would do it in a single line, with zero dependencies:
new_hash = Hash[your_hash.collect{|k,v| [k.to_s, v]}]
This works on Ruby 1.8.7 and up.
If you are working with Ruby 2.1, you can do:
new_hash = a.collect{|k,v| [k.to_s, v]}.to_h
Note that this solution is not recursive, nor will it handle "duplicate" keys properly. eg. if you have :key and also "key" as keys in your hash, the last one will take precedence and overwrite the first one.
answered Apr 29 '16 at 10:47
elieli
180213
add a comment |
stringify_keys from rails
http://api.rubyonrails.org/classes/Hash.html#method-i-stringify_keys
hash = { name: 'Rob', age: '28' }
hash.stringify_keys
# => { "name" => "Rob", "age" => "28" }
answered Apr 23 '14 at 12:12
EryEry
49155
add a comment |
there is a nice library that does the trick, the library is "facets/hash/rekey"
and the method is rekey!. Se my example below of how to use it. It is just a copy past of
> require 'facets/hash/rekey'
=> true
> a = {:one => "Value 1", :two => "Value 2"}
=> {:one=>"Value 1", :two=>"Value 2"}
> a.rekey!(&:to_s)
=> {"one"=>"Value 1", "two"=>"Value 2"}
> a
=> {"one"=>"Value 1", "two"=>"Value 2"}
answered May 11 '12 at 10:43
rik.vanmechelenrik.vanmechelen
1,7541423
add a comment |
new_hash = Hash.new
your_hash.each{ |k,v| new_hash[k.to_s] = v }
new_hash will be same as your_hash but with string keys
edited Sep 26 '18 at 8:34
dotoree
2,73011826
answered May 11 '12 at 10:31
abhasabhas
4,70512251
add a comment |
I came here to see if there was something better than:
JSON.parse(hash.to_json)
But I think I'll stick with what I have.
answered Nov 16 '18 at 22:52
pguardiariopguardiario
37k1080118
Be careful with this strategy as it will also turn any values that are symbols into strings.
– Tom
Dec 23 '18 at 9:01
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f10549554%2fhow-to-change-hash-keys-from-symbols-to-strings%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
7 Answers
7
active
oldest
votes
7 Answers
7
active
oldest
votes
active
oldest
votes
active
oldest
votes
simply call stringify_keys (or stringify_keys!)
http://apidock.com/rails/Hash/stringify_keys
answered May 11 '12 at 10:31
Viktor TrónViktor Trón
7,04224046
5
Be careful with this one.. it does not work recursively.
– baash05
Apr 8 '13 at 3:12
15
deep_stringify_keysis recursive, but I believe it's only in Rails 4: apidock.com/rails/v4.0.2/Hash/deep_stringify_keys
– Romain Paulus
Feb 21 '14 at 23:49
Thanks @RomainPaulus! that helped!
– Dorian
Mar 16 '15 at 19:21
add a comment |
simply call stringify_keys (or stringify_keys!)
http://apidock.com/rails/Hash/stringify_keys
answered May 11 '12 at 10:31
Viktor TrónViktor Trón
7,04224046
5
Be careful with this one.. it does not work recursively.
– baash05
Apr 8 '13 at 3:12
15
deep_stringify_keysis recursive, but I believe it's only in Rails 4: apidock.com/rails/v4.0.2/Hash/deep_stringify_keys
– Romain Paulus
Feb 21 '14 at 23:49
Thanks @RomainPaulus! that helped!
– Dorian
Mar 16 '15 at 19:21
add a comment |
simply call stringify_keys (or stringify_keys!)
http://apidock.com/rails/Hash/stringify_keys
answered May 11 '12 at 10:31
Viktor TrónViktor Trón
7,04224046
simply call stringify_keys (or stringify_keys!)
http://apidock.com/rails/Hash/stringify_keys
answered May 11 '12 at 10:31
Viktor TrónViktor Trón
7,04224046
answered May 11 '12 at 10:31
Viktor TrónViktor Trón
7,04224046
answered May 11 '12 at 10:31
Viktor TrónViktor Trón
7,04224046
answered May 11 '12 at 10:31
Viktor TrónViktor Trón
7,04224046
7,04224046
5
Be careful with this one.. it does not work recursively.
– baash05
Apr 8 '13 at 3:12
15
deep_stringify_keysis recursive, but I believe it's only in Rails 4: apidock.com/rails/v4.0.2/Hash/deep_stringify_keys
– Romain Paulus
Feb 21 '14 at 23:49
Thanks @RomainPaulus! that helped!
– Dorian
Mar 16 '15 at 19:21
add a comment |
5
Be careful with this one.. it does not work recursively.
– baash05
Apr 8 '13 at 3:12
15
deep_stringify_keysis recursive, but I believe it's only in Rails 4: apidock.com/rails/v4.0.2/Hash/deep_stringify_keys
– Romain Paulus
Feb 21 '14 at 23:49
Thanks @RomainPaulus! that helped!
– Dorian
Mar 16 '15 at 19:21
5
5
Be careful with this one.. it does not work recursively.
– baash05
Apr 8 '13 at 3:12
Be careful with this one.. it does not work recursively.
– baash05
Apr 8 '13 at 3:12
15
15
deep_stringify_keys is recursive, but I believe it's only in Rails 4: apidock.com/rails/v4.0.2/Hash/deep_stringify_keys– Romain Paulus
Feb 21 '14 at 23:49
deep_stringify_keys is recursive, but I believe it's only in Rails 4: apidock.com/rails/v4.0.2/Hash/deep_stringify_keys– Romain Paulus
Feb 21 '14 at 23:49
Thanks @RomainPaulus! that helped!
– Dorian
Mar 16 '15 at 19:21
Thanks @RomainPaulus! that helped!
– Dorian
Mar 16 '15 at 19:21
add a comment |
Use stringify_keys/stringify_keys! methods of the Hash class.
You can also use some_hash.with_indifferent_access to return a Hash instance where your key can be specified as symbols or as strings with no difference.
answered May 11 '12 at 10:30
jdoejdoe
14.4k23844
add a comment |
Use stringify_keys/stringify_keys! methods of the Hash class.
You can also use some_hash.with_indifferent_access to return a Hash instance where your key can be specified as symbols or as strings with no difference.
answered May 11 '12 at 10:30
jdoejdoe
14.4k23844
add a comment |
Use stringify_keys/stringify_keys! methods of the Hash class.
You can also use some_hash.with_indifferent_access to return a Hash instance where your key can be specified as symbols or as strings with no difference.
answered May 11 '12 at 10:30
jdoejdoe
14.4k23844
Use stringify_keys/stringify_keys! methods of the Hash class.
You can also use some_hash.with_indifferent_access to return a Hash instance where your key can be specified as symbols or as strings with no difference.
answered May 11 '12 at 10:30
jdoejdoe
14.4k23844
answered May 11 '12 at 10:30
jdoejdoe
14.4k23844
answered May 11 '12 at 10:30
jdoejdoe
14.4k23844
answered May 11 '12 at 10:30
jdoejdoe
14.4k23844
14.4k23844
add a comment |
add a comment |
stringify_keys is nice, but only available in Rails.
Here's how I would do it in a single line, with zero dependencies:
new_hash = Hash[your_hash.collect{|k,v| [k.to_s, v]}]
This works on Ruby 1.8.7 and up.
If you are working with Ruby 2.1, you can do:
new_hash = a.collect{|k,v| [k.to_s, v]}.to_h
Note that this solution is not recursive, nor will it handle "duplicate" keys properly. eg. if you have :key and also "key" as keys in your hash, the last one will take precedence and overwrite the first one.
answered Apr 29 '16 at 10:47
elieli
180213
add a comment |
stringify_keys is nice, but only available in Rails.
Here's how I would do it in a single line, with zero dependencies:
new_hash = Hash[your_hash.collect{|k,v| [k.to_s, v]}]
This works on Ruby 1.8.7 and up.
If you are working with Ruby 2.1, you can do:
new_hash = a.collect{|k,v| [k.to_s, v]}.to_h
Note that this solution is not recursive, nor will it handle "duplicate" keys properly. eg. if you have :key and also "key" as keys in your hash, the last one will take precedence and overwrite the first one.
answered Apr 29 '16 at 10:47
elieli
180213
add a comment |
stringify_keys is nice, but only available in Rails.
Here's how I would do it in a single line, with zero dependencies:
new_hash = Hash[your_hash.collect{|k,v| [k.to_s, v]}]
This works on Ruby 1.8.7 and up.
If you are working with Ruby 2.1, you can do:
new_hash = a.collect{|k,v| [k.to_s, v]}.to_h
Note that this solution is not recursive, nor will it handle "duplicate" keys properly. eg. if you have :key and also "key" as keys in your hash, the last one will take precedence and overwrite the first one.
answered Apr 29 '16 at 10:47
elieli
180213
stringify_keys is nice, but only available in Rails.
Here's how I would do it in a single line, with zero dependencies:
new_hash = Hash[your_hash.collect{|k,v| [k.to_s, v]}]
This works on Ruby 1.8.7 and up.
If you are working with Ruby 2.1, you can do:
new_hash = a.collect{|k,v| [k.to_s, v]}.to_h
Note that this solution is not recursive, nor will it handle "duplicate" keys properly. eg. if you have :key and also "key" as keys in your hash, the last one will take precedence and overwrite the first one.
answered Apr 29 '16 at 10:47
elieli
180213
answered Apr 29 '16 at 10:47
elieli
180213
answered Apr 29 '16 at 10:47
elieli
180213
answered Apr 29 '16 at 10:47
elieli
180213
180213
add a comment |
add a comment |
stringify_keys from rails
http://api.rubyonrails.org/classes/Hash.html#method-i-stringify_keys
hash = { name: 'Rob', age: '28' }
hash.stringify_keys
# => { "name" => "Rob", "age" => "28" }
answered Apr 23 '14 at 12:12
EryEry
49155
add a comment |
stringify_keys from rails
http://api.rubyonrails.org/classes/Hash.html#method-i-stringify_keys
hash = { name: 'Rob', age: '28' }
hash.stringify_keys
# => { "name" => "Rob", "age" => "28" }
answered Apr 23 '14 at 12:12
EryEry
49155
add a comment |
stringify_keys from rails
http://api.rubyonrails.org/classes/Hash.html#method-i-stringify_keys
hash = { name: 'Rob', age: '28' }
hash.stringify_keys
# => { "name" => "Rob", "age" => "28" }
answered Apr 23 '14 at 12:12
EryEry
49155
stringify_keys from rails
http://api.rubyonrails.org/classes/Hash.html#method-i-stringify_keys
hash = { name: 'Rob', age: '28' }
hash.stringify_keys
# => { "name" => "Rob", "age" => "28" }
answered Apr 23 '14 at 12:12
EryEry
49155
answered Apr 23 '14 at 12:12
EryEry
49155
answered Apr 23 '14 at 12:12
EryEry
49155
answered Apr 23 '14 at 12:12
EryEry
49155
49155
add a comment |
add a comment |
there is a nice library that does the trick, the library is "facets/hash/rekey"
and the method is rekey!. Se my example below of how to use it. It is just a copy past of
> require 'facets/hash/rekey'
=> true
> a = {:one => "Value 1", :two => "Value 2"}
=> {:one=>"Value 1", :two=>"Value 2"}
> a.rekey!(&:to_s)
=> {"one"=>"Value 1", "two"=>"Value 2"}
> a
=> {"one"=>"Value 1", "two"=>"Value 2"}
answered May 11 '12 at 10:43
rik.vanmechelenrik.vanmechelen
1,7541423
add a comment |
there is a nice library that does the trick, the library is "facets/hash/rekey"
and the method is rekey!. Se my example below of how to use it. It is just a copy past of
> require 'facets/hash/rekey'
=> true
> a = {:one => "Value 1", :two => "Value 2"}
=> {:one=>"Value 1", :two=>"Value 2"}
> a.rekey!(&:to_s)
=> {"one"=>"Value 1", "two"=>"Value 2"}
> a
=> {"one"=>"Value 1", "two"=>"Value 2"}
answered May 11 '12 at 10:43
rik.vanmechelenrik.vanmechelen
1,7541423
add a comment |
there is a nice library that does the trick, the library is "facets/hash/rekey"
and the method is rekey!. Se my example below of how to use it. It is just a copy past of
> require 'facets/hash/rekey'
=> true
> a = {:one => "Value 1", :two => "Value 2"}
=> {:one=>"Value 1", :two=>"Value 2"}
> a.rekey!(&:to_s)
=> {"one"=>"Value 1", "two"=>"Value 2"}
> a
=> {"one"=>"Value 1", "two"=>"Value 2"}
answered May 11 '12 at 10:43
rik.vanmechelenrik.vanmechelen
1,7541423
there is a nice library that does the trick, the library is "facets/hash/rekey"
and the method is rekey!. Se my example below of how to use it. It is just a copy past of
> require 'facets/hash/rekey'
=> true
> a = {:one => "Value 1", :two => "Value 2"}
=> {:one=>"Value 1", :two=>"Value 2"}
> a.rekey!(&:to_s)
=> {"one"=>"Value 1", "two"=>"Value 2"}
> a
=> {"one"=>"Value 1", "two"=>"Value 2"}
answered May 11 '12 at 10:43
rik.vanmechelenrik.vanmechelen
1,7541423
answered May 11 '12 at 10:43
rik.vanmechelenrik.vanmechelen
1,7541423
answered May 11 '12 at 10:43
rik.vanmechelenrik.vanmechelen
1,7541423
answered May 11 '12 at 10:43
rik.vanmechelenrik.vanmechelen
1,7541423
1,7541423
add a comment |
add a comment |
new_hash = Hash.new
your_hash.each{ |k,v| new_hash[k.to_s] = v }
new_hash will be same as your_hash but with string keys
edited Sep 26 '18 at 8:34
dotoree
2,73011826
answered May 11 '12 at 10:31
abhasabhas
4,70512251
add a comment |
new_hash = Hash.new
your_hash.each{ |k,v| new_hash[k.to_s] = v }
new_hash will be same as your_hash but with string keys
edited Sep 26 '18 at 8:34
dotoree
2,73011826
answered May 11 '12 at 10:31
abhasabhas
4,70512251
add a comment |
new_hash = Hash.new
your_hash.each{ |k,v| new_hash[k.to_s] = v }
new_hash will be same as your_hash but with string keys
edited Sep 26 '18 at 8:34
dotoree
2,73011826
answered May 11 '12 at 10:31
abhasabhas
4,70512251
new_hash = Hash.new
your_hash.each{ |k,v| new_hash[k.to_s] = v }
new_hash will be same as your_hash but with string keys
edited Sep 26 '18 at 8:34
dotoree
2,73011826
answered May 11 '12 at 10:31
abhasabhas
4,70512251
edited Sep 26 '18 at 8:34
dotoree
2,73011826
edited Sep 26 '18 at 8:34
dotoree
2,73011826
edited Sep 26 '18 at 8:34
dotoree
2,73011826
2,73011826
answered May 11 '12 at 10:31
abhasabhas
4,70512251
answered May 11 '12 at 10:31
abhasabhas
4,70512251
answered May 11 '12 at 10:31
abhasabhas
4,70512251
4,70512251
add a comment |
add a comment |
I came here to see if there was something better than:
JSON.parse(hash.to_json)
But I think I'll stick with what I have.
answered Nov 16 '18 at 22:52
pguardiariopguardiario
37k1080118
Be careful with this strategy as it will also turn any values that are symbols into strings.
– Tom
Dec 23 '18 at 9:01
add a comment |
I came here to see if there was something better than:
JSON.parse(hash.to_json)
But I think I'll stick with what I have.
answered Nov 16 '18 at 22:52
pguardiariopguardiario
37k1080118
Be careful with this strategy as it will also turn any values that are symbols into strings.
– Tom
Dec 23 '18 at 9:01
add a comment |
I came here to see if there was something better than:
JSON.parse(hash.to_json)
But I think I'll stick with what I have.
answered Nov 16 '18 at 22:52
pguardiariopguardiario
37k1080118
I came here to see if there was something better than:
JSON.parse(hash.to_json)
But I think I'll stick with what I have.
answered Nov 16 '18 at 22:52
pguardiariopguardiario
37k1080118
answered Nov 16 '18 at 22:52
pguardiariopguardiario
37k1080118
answered Nov 16 '18 at 22:52
pguardiariopguardiario
37k1080118
answered Nov 16 '18 at 22:52
pguardiariopguardiario
37k1080118
37k1080118
Be careful with this strategy as it will also turn any values that are symbols into strings.
– Tom
Dec 23 '18 at 9:01
add a comment |
Be careful with this strategy as it will also turn any values that are symbols into strings.
– Tom
Dec 23 '18 at 9:01
Be careful with this strategy as it will also turn any values that are symbols into strings.
– Tom
Dec 23 '18 at 9:01
Be careful with this strategy as it will also turn any values that are symbols into strings.
– Tom
Dec 23 '18 at 9:01
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f10549554%2fhow-to-change-hash-keys-from-symbols-to-strings%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
5
If you used HashWithIndifferentAccess instead of a hash, then that would be done automatically for you.
– Mark Thomas
May 11 '12 at 10:46