For example {:> => :<} is a valid ruby hash. Replacing outdoor electrical box at end of conduit, Non-anthropic, universal units of time for active SETI. symbol literals have a broader set of allowed characters, gist.github.com/akagr/0339fb80f1b268a48a43ffbd1606cb3b, https://github.com/bibstha/ruby_hash_parser/blob/master/test/test_hash_parser.rb, Making location easier for developers with new data primitives, Stop requiring only one assertion per unit test: Multiple assertions are fine, Mobile app infrastructure being decommissioned. Find centralized, trusted content and collaborate around the technologies you use most. rev2022.11.3.43005. Convert a Ruby Hash into valid JSON | RexBlog - Rex Feng Otherwise generate a JSON text from the Ruby data structure object and return it. A source can either be a string-like object, an IO-like object, or an object responding to the read method. This method will create a Ruby hash with the JSON keys. To whoever downvoted me. It's most likely because this isn't valid JSON. Should we burninate the [variations] tag? We also have to convert any symbols into regular string-keys as symbols aren't appropriate in JSON. Thanks! SQL PostgreSQL add attribute from polygon to all points inside polygon but keep all points not just those that fall inside polygon. How to turn into a hash what has been made into a string of a hash? JSON "[" a "{", Perl decode_json. hash = JSON.parse (test).deep_symbolize_keys. You should just never create this form of danger. Plus, equally simple for machines to generate or parse. Convert a Ruby Hash into valid JSON | Flatiron School I want to access json string like hash object so that i can access json using key value like temp["anykey"]. USING EVAL can be dangerous here, according to my teacher. I tried with each: But I get the error: undefined method each for #. Found the regexes a little hard to follow, so created a gist for this with some test cases. With require 'json', you can easily parse a JSON formatted string into a Ruby hash with JSON.parse (json_string). Example string showing why David's teacher is correct: '{:surprise => "#{system \"rm -rf * \"}"}'. Connect and share knowledge within a single location that is structured and easy to search. Often referred to as an _object_, hash table, record, struct, keyed list, or associative array. The string created by calling Hash#inspect can be turned back into a hash by calling eval on it. Connect and share knowledge within a single location that is structured and easy to search. The best answers are voted up and rise to the top, Not the answer you're looking for? This says a lot. Finally, you may read it easily by doing: my_hash = JSON.load(File.read('your_flat_file_name')) This is simple and very easy . Unfortunately the conversion to yaml isn't simple and you'd probably want to borrow it from AS if you don't have AS in your project already. How to help a successful high schooler who is failing in college? When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. Downvoting without an explanatory comment is the cancer of Stack Overflow. How can I parse string(ruby hash) to JSON or Array in Rhodes? Very cool solution. So I can check the validity of a string to be, Yes, but in order to do that you either need a full Ruby parser, or you need to know where the string came from in the first place and know that it can only generate strings, symbols, and numbers. How can I parse string(ruby hash) to JSON or Array in Rhodes? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. JSON is completely language agnostic, making it the ideal interchange format. With gsub + parse you'd probably hit the same issue that any sort of nave string manipulation (including the code in my answer) has: Delimiter-tokens being taken taken out of context, and breaking things. Does a creature have to see to be affected by the Fear spell initially since it is an illusion? [] Rails - recovering database from Production.log [] Database sharding and Rails However, its unable to handle hashes that have a date string in them (our date strings end up not being surrounded by strings, which is where the big issue comes in): string = '{'last_request_at' : 2011-12-28 23:00:00 UTC }' Connect and share knowledge within a single location that is structured and easy to search. I cannot emphasize the DANGER of using EVAL here enough! Wow. JSON is completely language agnostic, making it the ideal interchange format. Converting Ruby Hash keys to Strings/Symbols. To learn more, see our tips on writing great answers. Multiplication table with plenty of comments, Short story about skydiving while on a time dilation drug, Regex: Delete all lines before STRING, except one particular line. In JSON all property names must be double-quoted and string values must also be double-quotes. The string can have any depth of nesting. Steps What does puncturing in cryptography mean. Cheers! Choose only those attributes you really need in the JSON response. How to check if a value exists in an array in Ruby. Library+spec: File: spec/lib/ext/hash/from_string_spec.rb: Here is a method using whitequark/parser which is safer than both gsub and eval methods. What's a good single chain ring size for a 7s 12-28 cassette for better hill climbing? I came to this question after writing a one-liner for this purpose, so I share my code in case it helps somebody. Not the answer you're looking for? Should we burninate the [variations] tag? While the result of #as_json may look like JSON, it's actually a Ruby hash. Ruby Map Syntax The syntax for map looks like this: array = ["a", "b", "c"] array.map { |string| string.upcase } # ["A", "B", "C"] First, you have an array, but it could also be a hash, or a range. Why? Finding features that intersect QgsRectangle but are not equal to themselves using PyQGIS. In case you're not intimately familiar with them, you can see below an example of how to interact with either a String . By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. To make this answer even more applicable to the OP's question, if your string representation of a hash is called 'strungout' you should be able to do hashit = JSON.parse (strungout.to_json) and then select your items inside hashit via hashit ['keyname'] as normal. To learn more, see our tips on writing great answers. Is the structure "as is something" valid and formal? Asking for help, clarification, or responding to other answers. @VladimirPanteleev You're right, it would. Fourier transform of a functional derivative. Thanks! Just construct a hash straight away with each_with_object or construct an array of pairs, and turn that into a hash. Find centralized, trusted content and collaborate around the technologies you use most. Does squeezing out liquid from shredded potatoes significantly reduce cook time? Just for the sake of understanding. Would it be illegal for me to act as a Civillian Traffic Enforcer? How to remove a key from Hash and get the remaining hash in Ruby/Rails? Why is SQL Server setup recommending MAXDOP 8 here? To learn more, see our tips on writing great answers. Why is proving something is NP-complete useful, and where can I use it? a nested string with a semicolon in it will be split as though it's a delimiter. you are missing ActiveSupport::JSON. ruby convesrt json string to json hash; convert json to hash and back; how to directly use hash as json in rails; how to write a hash in a json file of arrays ruby; ruby hash to json online; rails hash to json; json to hash rails; ruby json string to hash; convert ruby hash to json online; hash to json string ruby; rails convert hash to json . Personally I'm a fan of explicit descriptions, but thats just a preference. So you can also use File.read instead if you wanted. You use Marshal exactly the same way you use YAML, but replace the word YAML with Marshal :) ```ruby a = A.new("hello world", 5) puts a serialized_object = Marshal::dump(a) puts Marshal::load(serialized_object) In A: hello world, 5 In A: hello world, 5. Would result in an invalid JSON string error when it tries to parse the date value. parse( raw_data) Once loaded, we can proceed to work with the data like an ordinary Ruby hash. But ensuring JSON objects is what I am looking for, thus extra checking is needed. How to Parse JSON in Ruby - Linux Hint Convert String to JSON in Ruby; Ruby 1.8.7 convert hash . Connect and share knowledge within a single location that is structured and easy to search. Parse a JSON String in Ruby | Delft Stack These not show. 3. [Solved] Sort in ruby a JSON array of hashes | 9to5Answer Stack Exchange network consists of 182 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Even if you think you'll never open this up more publicly, someone else might. You can easily tell hashes by their hash rockets ( =>) and JSON by its usage of colons (: ). By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Ruby Language Tutorial => Using JSON with Ruby convert ruby hash to json string Code Example - Grepper An ordered list of values. Rails - Saving Ransack Query for later use, How to convert a string to lower or upper case in Ruby. ruby hash to json string Code Example - codegrepper.com }. My situation, I was pulling some data from an API and writing it to a file locally. it doesn't give me value of key 'version' but it gives me key itself 'version'. Using Rails 4 or above, If you want to have symbol keys instead of string keys, you can use deep_symbolize_keys method. More commonly called an _array_, vector, sequence or list. lenovo wifi driver windows 8. I agree with Jordan: speak to whoever provides the API. Module: JSON (Ruby 2.6.3) Here's my attempt at a more thorough (safe) conversion. I realized that I was trying to solve the wrong problem. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Single-quotes are never valid. Thanks for contributing an answer to Code Review Stack Exchange! I know JSON.parse could do this pretty easily, but without using that, how could this be made cleaner or more efficient? I know of one corner case which this solution doesn't handle which is single character symbols made up of odd, but allowed characters. How to convert ruby formatted json string to json hash in ruby? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. "if all that's in the hash is strings, symbols, and numbers,". How can we create psychedelic experiences for healthy people without drugs? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Thank you so much buddy you made my day ummmaaahhh, i did that temp.to_json gives me "{\"user_agent\"=>\"curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1 zlib/1.2.3.4 libidn/1.23 librtmp/2.3\", \"host\"=>\"localhost:4567\", \"version\"=>\"HTTP/1.1\", \"http_token\"=>\"375fe428b1d32787864264b830c54b97\", \"accept\"=>\"*/*\"}", i stored it in t1 and then access like t1['version']. How do I get the current absolute URL in Ruby on Rails? You could add a gsub of all. [Solved]-Convert JSON to string or hash in ruby-ruby I split each of the substrings that were created with the split, whenever it finds a '=>'. The backend JSON returns the information in the following manner: In my application (Rhodes), I'm using Rho::AsyncHttp.post and send to my webview index the data: Now, when I inspect the variable form in my webview I get the data in the following structure: So, I need to show this data in a Table and I want loop this. What is the effect of cycling on weight loss? Module: JSON (Ruby 2.7.2) It only takes a minute to sign up. However, if all that's in the hash is strings, symbols, numbers, and arrays, it should work, because those have string representations that are valid Ruby syntax. So, really, don't do this. [cc] require 'json' It is easy for us humans to read and write. I have a mobile application that makes a request to my Rails backend. Also just to mention that IO is an ancestor of File. It's great because it allows you to access values with keys. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I used IO.read() to read the contents of the file into a variable. Once we have the file loaded, we can parse the JSON data using the JSON.parse method. - cixelsyd Jan 15, 2018 at 20:28 JSON serializes hashes using : to delimit the key/value pairs. This method works for one level deep hash. Modify JSON string comparing another JSON string Stack Overflow for Teams is moving to its own domain! How to Use The Ruby Map Method (With Examples) - RubyGuides To handle edge cases like parsing JSON.parse (123) Original answer (published in Oct 2013) [Solved] Ruby Convert String to Hash | 9to5Answer I have what I think is a strange error. I want to access json string like hash object so that i can access json using key value like temp["anykey"]. How do I convert a String object into a Hash object? This and to_yaml solves my problem since I have some control of the way the string is generated. How to convert ruby formatted json string into json object? Built on two universally available structures: 1. ruby on rails - Convert JSON string to hash - Stack Overflow How to convert string to hash WITHOUT EVAL. opts is a Hash object containing options that control both input allowed and output formatting. On the plus side, your values have proper types (not all strings). Programming Language Abap ActionScript Assembly BASIC C C# C++ Clojure Cobol CSS Dart When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. ActiveSupport::JSON.decode(string.gsub(/:([a-zA-z])/,'\\1').gsub('=>', ' : ')). Making location easier for developers with new data primitives, Stop requiring only one assertion per unit test: Multiple assertions are fine, Mobile app infrastructure being decommissioned. Serializing (And Deserializing) Objects With Ruby - Skorks - Perl . The => are the giveaway. Then being able to pull the data from the file and use the Hash. What is the effect of cycling on weight loss? If you have the option, using json is easier. RESULT OUTPUT: {"user_id"=>"11", "blog_id"=>"2", "comment_id"=>"1"}. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. How to convert ruby formatted json string into json object? Any sort of splitting/scanning is prone to errors if the string contains tokens that aren't part of the syntax. How can we build a space probe's computer to survive centuries of interstellar travel? How do I simplify/combine these two methods for finding the smallest and largest int in an array? Using word boundaries is more flexible: I have a light saber with me. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. rev2022.11.3.43005. SQL PostgreSQL add attribute from polygon to all points inside polygon but keep all points not just those that fall inside polygon. How can i extract files in the directory where they're located with the find command? A Hash includes the Enumerable module, which provides several iteration methods, such as: Enumerable#each, Enumerable#each_pair, Enumerable#each_key, and Enumerable#each_value..each and .each_pair iterate over each key-value pair:. It's great because it allows you to access values with keys. @YoLudke's reply is a good idea, but it only substitutes nils that are followed by a comma, so it will break if your hash ends with a nil value. Don't update the same variable again and again with very different values. Not the answer you're looking for? Hash or Array Because strings are valid JSON string and can be parsed successfully by JSON.parse. If the letter V occurs in a few native words, why isn't it included in the Irish Alphabet? Not the answer you're looking for? Gsub is preferable. | 9to5Answer Solution 1 You want JSON.parse or JSON.load: def load_user_lib( filename ) JSON.parse( IO.read(filename) ) end The key here is to use IO.read as a simple way to load the JSON string from dis. Code Review Stack Exchange is a question and answer site for peer programmer code reviews. Using Rails 4 or above, If you want to have symbol keys instead of string keys, you can use deep_symbolize_keys method. Only then, it applies the eval. As you can see, according to the output the objects before and after serialization are the same. Does the Fog Cloud spell work in conjunction with the Blind Fighting fighting style the way I think it does? Is there a way to make trades similar/identical to a university endowment manager to copy them? With [cci]require 'json' [/cci], you can easily parse a JSON formatted string into a Ruby hash with [cci]JSON.parse (json_string) [/cci]. How can i extract files in the directory where they're located with the find command? If a creature would die from an equipment unattaching, does that creature die with the effects of the equipment? 2022 Moderator Election Q&A Question Collection. If the letter V occurs in a few native words, why isn't it included in the Irish Alphabet? However, this requires the same to be true of all of the objects in the hash. Making statements based on opinion; back them up with references or personal experience. Multiplication table with plenty of comments, Non-anthropic, universal units of time for active SETI. :). To generate a Ruby String containing JSON data, use method JSON.generate(source, opts), where. Reshape hash of hashes into array of modified hashes without using nested each? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I think eval will do something here. Thanks for the pointer to .decode, it worked great for me. So for a quick and dirty simple JSON string you might try bulding a Hash of values: hash = {} hash['KeyOne']= somevalue.. etc . Asking for help, clarification, or responding to other answers. [Solved]-Convert JSON string to hash-ruby Search score:11 Accepted answer It's most likely because this isn't valid JSON. The easiest way to do this in Rails is to call the #to_json method on a model instance and pass only :option which contains the array of attributes names you really need: person.to_json (only: [:email, :name]) Consider truncating long content. You're getting an error because your string isn't valid JSON. Ruby String Substitution. But when I try to print the variable. Finding features that intersect QgsRectangle but are not equal to themselves using PyQGIS, How to constrain regression coefficients to be proportional. I split upon the string wherever it finds a ',' I'm surprised nobody pointed out JSON's [] method, which makes it very easy and transparent to decode and encode from/to JSON. When working with Ruby Hashes, you may find that there are two ways to interact with them, using the String notation commonly seen with JSON, but also using Ruby's Symbol concept. Making location easier for developers with new data primitives, Stop requiring only one assertion per unit test: Multiple assertions are fine, Mobile app infrastructure being decommissioned. What if any design issues are there in this method of loading configuration data from YAML in Ruby? How do I convert a Hash to a JSON string in Ruby 1.9? Yeah, at the end of the day whatever works. A creature have to see to be affected by the Fear spell initially since it an... Make trades similar/identical to a file locally solve the wrong problem finding features that intersect QgsRectangle are. On writing great answers to the read method Deserializing ) objects with Ruby - Skorks /a... Parse ( raw_data ) Once loaded, we can parse the JSON data use... Significantly reduce cook time hash straight away with each_with_object or construct an array of pairs, turn! Must be double-quoted and string values must also be double-quotes must also be double-quotes I convert a string to or... I think it does also have to see to be true of all the... And largest int in an array Once we have the option, using JSON easier. You should just never create this form of danger, '' build a space probe 's to! ; user contributions licensed under CC BY-SA JSON serializes hashes using: to delimit the key/value pairs objects in hash. See our tips on writing great answers where they 're located with the effects of the day works! References or personal experience be illegal for me to act as a Civillian Traffic Enforcer all points inside but... As symbols are n't part of the way I think it does n't give me value of key '... Was pulling some data from YAML in Ruby | Delft Stack < /a > } this up more,! The top, not the answer you 're getting an error because Your string is n't included! Io-Like object, or associative array safer than both gsub and EVAL methods the plus side, Your have... Most likely because this is n't valid JSON string in Ruby largest int in an array in Ruby ring! In a few native words, why is proving something is NP-complete useful, and where can I files. Any design issues are there in this method of loading configuration data an! Get the remaining hash in Ruby/Rails why is proving something is NP-complete useful, and numbers, '', IO-like! To copy them split as though it & # x27 ; it is an of. Time for active SETI s great because it allows you to access values keys! Also just to mention that IO is an illusion to convert Ruby JSON. < /a > - Perl open this up more publicly, someone else.. Realized that I was pulling some data from the file loaded, we can parse the data... In it will be split as though it & # x27 ; JSON & quot a..., '': to delimit the key/value pairs is easier are n't part the... Found the regexes a little hard to follow, so created a gist for this some! Can I use it, at the end of the objects before and after serialization are the.. # as_json may look like JSON, it worked great for me to act as a Civillian Traffic?..., symbols, and turn that into a hash object containing options that both. Method each for # a request to my teacher JSON.parse method semicolon in it will split. Update the same this RSS feed, copy and paste this URL into RSS. In case it helps somebody to copy them may look like JSON, it & # x27 it! This method will create a Ruby string containing JSON data using the JSON.parse method symbols, and where I... Cixelsyd Jan 15, 2018 at 20:28 JSON serializes hashes using: to delimit the key/value pairs Skorks /a. With Ruby - Skorks < /a > - Perl and output formatting using word boundaries is more flexible I... Never open this up more publicly, someone else might, an IO-like object, or object... It 's most likely because this is n't valid JSON look like JSON, &! We have the option, using JSON is completely language agnostic, making it the interchange. Is sql Server setup recommending MAXDOP 8 here from an equipment unattaching, does that die. In it will be split as though it & # x27 ; &... Code in case it helps somebody that 's in the directory where they 're located with the command. Choose only those attributes you really need in the hash coefficients to be by. Site design / logo 2022 Stack Exchange is a valid Ruby hash sort of splitting/scanning is to... You can use deep_symbolize_keys method reshape hash of hashes into array of,. You wanted into regular string-keys as symbols are json string to ruby hash part of the syntax '' valid formal... You wanted code Review Stack Exchange Inc ; user contributions licensed under CC BY-SA which is than. > = >: < } is a question and answer site for programmer! And where can I extract files in the Irish Alphabet whoever provides the API universal. Keyed list, or associative array helps somebody more flexible: I have some of. Make trades similar/identical to a university endowment manager to copy them clicking Post Your,... With Ruby - Skorks < /a > - Perl, sequence or list record,,! Keep all points inside polygon but keep all points not just those that fall inside polygon initially since it an! File: spec/lib/ext/hash/from_string_spec.rb: here is a method using whitequark/parser which is safer than both and... Have some control of the equipment for finding the smallest and largest in! Computer to survive centuries of interstellar travel the wrong problem n't give me value of key 'version but... This is n't it included in the directory where they 're located with find. Are voted up and rise to the read method as is something '' valid and formal have some of. Object, an IO-like object, an IO-like object, or associative array for... Agree to our terms of service, privacy policy and cookie policy using PyQGIS how! Use it are valid JSON the read method example - codegrepper.com < >. # inspect can be dangerous here, according to the top, the... You wanted hashes into array of modified hashes without using nested each command!, or responding to other answers pretty easily, but without using nested each creature. Potatoes significantly reduce cook time IO-like object, an IO-like object, an object. Without an explanatory comment is the effect of cycling on weight loss proving something NP-complete! ; a & quot ; a & quot ; [ & quot,... By JSON.parse policy and cookie policy methods for finding the smallest and largest in! Remove a key from hash and get the current absolute URL in Ruby 1.9 the technologies use! ), where JSON data, use method JSON.generate ( source, opts ), where sort splitting/scanning., use method JSON.generate ( source, opts ), where object into hash! File into a hash what has been made into a hash object options that control both input allowed and formatting... A successful high schooler who is failing in college plus side, Your have. For machines to generate a Ruby hash with the find command is needed parse... 4 or above, if you want to have symbol keys instead string. A preference little hard to follow, so I share my code case., Your values have proper types ( not all strings ) copy?. Liquid from shredded potatoes significantly reduce cook time largest json string to ruby hash in an array our terms of,... These not show 're located with the effects of the syntax give me value of key 'version ' but gives... Tips on writing great answers style the way I think it does n't me... Qgsrectangle but are not equal to themselves using PyQGIS whoever provides the API JSON.parse. Turn that into a hash struct, keyed list, or responding to other answers undefined.: I have a mobile application that makes a request to my Rails backend finding smallest. A 7s 12-28 cassette for better hill climbing hash to a JSON string JSON. Splitting/Scanning is prone to json string to ruby hash if the string contains tokens that are n't appropriate in JSON all names... Construct a hash straight away with each_with_object or construct an array in Ruby on Rails symbol keys of. Little hard to follow, so created a gist for this with some test cases mobile application that makes request... 'M a fan of explicit descriptions, but thats just a preference how remove... Know JSON.parse could do this pretty easily, but without using that, how to convert formatted. The output the objects in the directory where they 're located with the Blind Fighting Fighting style the the! We can parse the JSON data using the JSON.parse method again and again very. Quot ; [ & quot ; { & quot ; a & quot ; a & quot ;, decode_json... Generate or parse it included in the JSON response to turn into a hash > = > Ruby hash ) to read the contents of the day whatever works must also double-quotes! Perl decode_json n't appropriate in JSON all property names must be double-quoted and string values must also be.... Json.Parse method copy them EVAL can be dangerous here, according to the top, not the you! Because strings are valid JSON > parse a JSON string in Ruby 1.9 must also be double-quotes >... To have symbol keys instead of string keys, you agree to our terms service.

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