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RUBY QUESTIONS

macOS Mojave 'ruby/config.h' file not found
macOS Mojave 'ruby/config.h' file not found
To fix the issue you can do macOS Catalina Issue reappeared in Catalina and I wasn't able to spot this package in the Developer SDK. Until better solution found, I was able to workaround this with rubyenv: https://github.com/orta/cocoapods-keys/issue
TAG : ruby
Date : December 05 2020, 12:24 PM , By : Daniel Griffin
How to delete attr_accessor in ruby
How to delete attr_accessor in ruby
wish of those help You cannot have a class greet, so I suppose you have something else, say A.
TAG : ruby
Date : December 05 2020, 12:24 PM , By : nayde
How to reversibly escape a URL in Ruby so that it can be saved to the file system
How to reversibly escape a URL in Ruby so that it can be saved to the file system
like below fixes the issue One of the ways is by "hashing" the filename. For example, the URL for this question is: https://stackoverflow.com/questions/18234870/how-to-reversibly-escape-a-url-in-ruby-so-that-it-can-be-saved-to-the-file-syste. You cou
TAG : ruby
Date : December 05 2020, 12:24 PM , By : DWAnderson73
Point belonging to which Polygon
Point belonging to which Polygon
I wish this help you So first of all, you say your query returns nil. Well, that's not true. The first method on your query results returns nil. Your query returned an empty array. i.e. it didn't throw an error but did not yield any results. in rgeo
TAG : ruby
Date : December 01 2020, 04:55 PM , By : Saber
How to implement custom mutating methods in Ruby?
How to implement custom mutating methods in Ruby?
To fix this issue I don't think you can implement val //= 23, which Perl refers to as "dor" (defined-or). There's no underlying method call. Instead, val ||= 23 is compiled into...
TAG : ruby
Date : November 28 2020, 08:01 AM , By : yuexuanwo
Precedence operators in Ruby from Haskell?
Precedence operators in Ruby from Haskell?
it should still fix some issue Operator precedence is not modifiable. Use parens if you want to change default precedence.The issue is in the parser (assuming you're defining max with a splatted param); Ruby's liberal whitespace policies can create i
TAG : ruby
Date : November 28 2020, 08:01 AM , By : 荻野チヒロ
How to install command line tools on OSX Mavericks
How to install command line tools on OSX Mavericks
I wish this help you Incase, while trying to update a bundle, you get an error "You have to install development tools first." on OSX Mavericks (OSX 10.9), but you already have Xcode installed, you can still manually install the dev tools via terminal
TAG : ruby
Date : November 28 2020, 08:01 AM , By : Venkatesh Kumar
When making network requests, when should I use Threads vs Processes?
When making network requests, when should I use Threads vs Processes?
seems to work fine Before going into detail, there is already a library solving your problem. Typhoeus is optimized to run a large number of HTTP requests in parallel and is based on the libcurl library.
TAG : ruby
Date : November 28 2020, 08:01 AM , By : Олег Синельников
how to call method in one application from another application in ruby on rails
how to call method in one application from another application in ruby on rails
wish of those help Cross-domain AJAX is indeed a problem, but none that could not be solved. In your get_course method you could return the course objects as a JSON response like so:
TAG : ruby
Date : November 27 2020, 01:01 AM , By : Andriy Prokip
LoadError on line ["51"] when trying compass watch command
LoadError on line ["51"] when trying compass watch command
this one helps. I got it going now. Turns out that I needed to install the "animation" gemfile.
TAG : ruby
Date : November 26 2020, 01:01 AM , By : Jani
Why does `Dir[directory_path].empty?` return `false` all the time?
Why does `Dir[directory_path].empty?` return `false` all the time?
this one helps. Dir[directory_path].empty? returns false all the time. The behavior is the same whether or not I run irb as root: , Dir[].empty? returns false all the time
TAG : ruby
Date : November 26 2020, 01:01 AM , By : migue rivera villa
ruby conjunction and union operators
ruby conjunction and union operators
help you fix your problem So I have just (accidentally) discovered that Ruby allows the following Syntax: , Are the operators different?
TAG : ruby
Date : November 26 2020, 01:01 AM , By : exp_function
Ruby - watch for file with extension being updated
Ruby - watch for file with extension being updated
I wish this helpful for you You want inotify. A Ruby wrapper, rb-notify, is available.
TAG : ruby
Date : November 25 2020, 07:27 PM , By : petermanoukian
How do I have Ruby YAML dump a Hash subclass as a simple Hash?
How do I have Ruby YAML dump a Hash subclass as a simple Hash?
This might help you You can achieve this with the (poorly documented) encode_with and represent_map methods. To customise the YAML serialisation of an object you provide it with an encode_with method which accepts a coder object, one of the methods o
TAG : ruby
Date : November 25 2020, 07:06 PM , By : mmali
How do I get ruby-prof to ignore Ruby core / standard library / gem methods?
How do I get ruby-prof to ignore Ruby core / standard library / gem methods?
I wish this helpful for you I agree this is a big problem with ruby-prof. I've tended to prefer perftools.rb. It integrates with gperftools and it supports various focus and ignore options, along with graphical reports which are superior for quickly
TAG : ruby
Date : November 25 2020, 01:01 AM , By : tobiedove
How do I give my instance variable a getter?
How do I give my instance variable a getter?
hop of those help? I have an instance variable which I want to set to a value if it's nil when requested. Is something like this correct, or would it cause problems?
TAG : ruby
Date : November 24 2020, 03:41 PM , By : Emanuel Kreidl
syntax error, unexpected '=', expecting keyword_end
syntax error, unexpected '=', expecting keyword_end
it fixes the issue I have this code: , Change:
TAG : ruby
Date : November 24 2020, 03:41 PM , By : krishna kumar gupta
Symbol literal or a method
Symbol literal or a method
it should still fix some issue : is really just part of the literal you enter yourself or create through a method. Although : can take a name or a "string" to create a literal, unlike an operator it does not provoke any action or modify a value.In ea
TAG : ruby
Date : November 24 2020, 03:41 PM , By : Tim Lyons
Singleton logger usage in ruby
Singleton logger usage in ruby
Does that help Let us look at the documentation of Module: Singleton. Including the module ensures, that only one instance of your class can be created by making the initialize method private. Hence, you receive NoMethodError - new is private error.
TAG : ruby
Date : November 24 2020, 03:41 PM , By : Elona Galanos
Difficult code packaging design
Difficult code packaging design
will be helpful for those in need Have the same problem. Option 1 seems the most obvious, but it requires the author to understand the intricacies of git - and I can see that going wrong easily.I'd tend towards a modification of 2, where you have a c
TAG : ruby
Date : November 24 2020, 05:47 AM , By : qzd
Passing absent parameters
Passing absent parameters
I hope this helps . I have seen a particular code smell with default parameters. That is when a method has a default value set for one of its params but the caller passes nil instead of passing no value. In most cases, this is because the caller has
TAG : ruby
Date : November 24 2020, 05:47 AM , By : samortaylor
Is there a more efficient way of ensuring my database gets closed?
Is there a more efficient way of ensuring my database gets closed?
it helps some times I'm using the Daybreak library, which is a key/value store. , Use a block:
TAG : ruby
Date : November 24 2020, 05:47 AM , By : Craig
Take in escaped input in Ruby command line app
Take in escaped input in Ruby command line app
may help you . What you're looking for is using single quotes instead of double quotes.Thus:
TAG : ruby
Date : November 24 2020, 05:44 AM , By : Paulo Ederson
String with comma-separated values and newlines: split values and create arrays for each newline
String with comma-separated values and newlines: split values and create arrays for each newline
With these it helps I have a string like this (from a form submission):
TAG : ruby
Date : November 24 2020, 01:01 AM , By : Steve
Instance variables on Ruby main class
Instance variables on Ruby main class
hop of those help? @name is an instance variable, @@name would be a class variable.When you define an instance variable outside any explicit class definition, you implicitly are inside the Object space.
TAG : ruby
Date : November 24 2020, 01:01 AM , By : user2957513
How do I cache user specific objects
How do I cache user specific objects
I wish this help you It depends on what you use for caching, and which kind of cache you want. Regardless the type of cache, the common procedure is to use key/secret as part of the cache key.For instance, using memoization.
TAG : ruby
Date : November 23 2020, 01:01 AM , By : user2957353
How to specify the location of the chromedriver binary
How to specify the location of the chromedriver binary
This might help you Solution 1 - Selenium::WebDriver::Chrome.driver_path=There is a Selenium::WebDriver::Chrome.driver_path= method that allows specifying of the chromedriver binary:
TAG : ruby
Date : November 22 2020, 03:03 PM , By : user2956917
How to setup "application/ld+json" schema.org meta data in rails 4 app
How to setup "application/ld+json" schema.org meta data in rails 4 app
should help you out There is a JSON-LD gem (http://rubygems.org/gems/json-ld), but it might not be specifically what you're looking for. Note that the point of JSON-LD is that it's just JSON, in this case using the schema.org context to interpret the
TAG : ruby
Date : November 22 2020, 03:03 PM , By : user2956805
How to use String split[]
How to use String split[]
With these it helps String is Ticket-178(Good) Like this.. , Is this what you need?
TAG : ruby
Date : November 22 2020, 10:54 AM , By : user2956296
Capture Ruby Logger output for testing
Capture Ruby Logger output for testing
this one helps. I have a ruby class like this: , The magic is to use capture_subprocess_io
TAG : ruby
Date : November 22 2020, 10:54 AM , By : user2956232
Regex group match if present
Regex group match if present
wish of those help Just turn .* inside the first source group into it's non-greedy form. And don't forget to add end of the line anchor.
TAG : ruby
Date : November 22 2020, 10:54 AM , By : user2956156
Unusual use of module namespacing
Unusual use of module namespacing
should help you out I am familiar with modules giving a class access to instance methods included in the module, but I have not seen modules giving classes access to local variables. , Why does file A have access to the local variable DB?
TAG : ruby
Date : November 22 2020, 10:54 AM , By : user2956109
Why doesn't this loop stop?
Why doesn't this loop stop?
Hope that helps The looping is because your until condition never exits. You are incrementing i when the successive characters match, but at the end of the loop you are resetting i to 1.If you edit this section and add this line:
TAG : ruby
Date : November 22 2020, 10:48 AM , By : Simon Sun
How do I run Rails/Rake from another directory?
How do I run Rails/Rake from another directory?
like below fixes the issue Without you showing the error message you are getting, I'm assuming it has less to do with Bundler than it does Rake. When the rake command is run, it searches for a Rakefile starting in the current directory and traversing
TAG : ruby
Date : November 22 2020, 10:48 AM , By : user2955716
Ruby Tempfile doesn't Create File on Disk
Ruby Tempfile doesn't Create File on Disk
will help you I'm currently running this code on Ruby. , Can you try a file.close.Test without Launchy:
TAG : ruby
Date : November 22 2020, 10:40 AM , By : Vadim
Consecutive letter frequency
Consecutive letter frequency
it fixes the issue I am trying to write code to determine consecutive frequency of letters within a string.
TAG : ruby
Date : November 22 2020, 10:38 AM , By : user2955223
Calling second-level function from the second level in Ruby
Calling second-level function from the second level in Ruby
seems to work fine The scope you are referring to is that of the class - Test. The method something is actually getting defined as the instance method of the class Test. You cannot really invoke an instance method from a class scope, hence the error.
TAG : ruby
Date : November 22 2020, 01:01 AM , By : Natal
How do I use a Chef Resource in a Library
How do I use a Chef Resource in a Library
like below fixes the issue This looks like you should be creating a resource, either an LWRP or a normal Ruby class. In most cases the LWRP will be simpler and is probably what you want in this case.cookbooks/mycook/resources/directory_structure.rb:
TAG : ruby
Date : November 21 2020, 07:31 AM , By : user2954042
Ruby Method Name Interpolation
Ruby Method Name Interpolation
This might help you I am trying to reduce the amount of code in on of my Ruby Classes by Iterating through a constant hash in order to produce al the wanted methods with a reduced amount of coding. , Here is the example for you:
TAG : ruby
Date : November 21 2020, 01:01 AM , By : Neha Bhandari
Weird behavior of #upcase! in Ruby
Weird behavior of #upcase! in Ruby
With these it helps In the clone documentation you can read:
TAG : ruby
Date : November 21 2020, 01:01 AM , By : centelles
Ruby array access position in array
Ruby array access position in array
I hope this helps you . I am not sure I understand the question there are many methods of accessing the index for an Array e.g.
TAG : ruby
Date : November 21 2020, 01:01 AM , By : user2953639
Ruby NameError: Undefined local variable
Ruby NameError: Undefined local variable
Any of those help Just started to go through the 7 languages in 7 weeks book; day one problem make a simple higher or lower game in ruby. When I execute my script I get the following error but I don't know why.
TAG : ruby
Date : November 21 2020, 01:01 AM , By : user2953490
Using Nokogiri to validate XML: finding the line-nr of validation errors?
Using Nokogiri to validate XML: finding the line-nr of validation errors?
I think the issue was by ths following , I just had to write it a little differently, instead of loading and parsing the entire xml upfront, I just needed to validate the file itself. Like so:
TAG : ruby
Date : November 19 2020, 03:59 PM , By : Wang Boyu
How to calling a function with arguments in one .rb script to another .rb script
How to calling a function with arguments in one .rb script to another .rb script
hop of those help? I am new to Ruby language. i want to work with ruby language, i have installed ruby 2.1.5 and i am trying to calling one .rb script to another .rb script with arguements and can you please suggest me how to do this. i have written
TAG : ruby
Date : November 18 2020, 03:49 PM , By : user2951914
Get and clear cookie using rest-client
Get and clear cookie using rest-client
I hope this helps you . From what I see the cookie you've got from the rest-client doesn't have the whole information you posted:
TAG : ruby
Date : November 18 2020, 11:13 AM , By : user2951659
invalid argument creating a ruby dev env with docker & fig
invalid argument creating a ruby dev env with docker & fig
hop of those help? Attempting to get a dev environment setup with fig and docker and I continually receive an 'invalid argument' error. , TL;DRTurned the computer off and then on again.
TAG : ruby
Date : November 18 2020, 11:13 AM , By : user2951519
How can I better test equality for decorated objects?
How can I better test equality for decorated objects?
like below fixes the issue I'm having trouble with equality matchers in RSpec and Draper decorated objects. , I think that you're encountering two misunderstandings.
TAG : ruby
Date : November 18 2020, 11:13 AM , By : user2951449
Replace text in brackets gsub
Replace text in brackets gsub
With these it helps I would like to replace text inside of brackets, and that has a colon and a u. , You could use a regex like this:
TAG : ruby
Date : November 18 2020, 11:13 AM , By : Ryan Watkins
Ruby's Array Combination Method
Ruby's Array Combination Method
hop of those help? Instead of Arraycombination, you want Arraypermutation:
TAG : ruby
Date : November 17 2020, 11:58 AM , By : user2950985
Don't have access to Heroku app
Don't have access to Heroku app
it should still fix some issue What's happened is the git repo on which you're working is tied to an old remote. No need to contact heroku or anything... Just remove the heroku git remote and readd it. Remove by running:
TAG : ruby
Date : November 17 2020, 11:58 AM , By : user2950935
Take any hash keys and flatten into mixed array
Take any hash keys and flatten into mixed array
help you fix your problem I have a mixed array like: ["foo", "bar", {test: "stuff"}, "foobar", {just: "examples}]
TAG : ruby
Date : November 17 2020, 11:58 AM , By : user2950776
Ruby On Rails Relationship Between Model, View, And Controller
Ruby On Rails Relationship Between Model, View, And Controller
I wish this helpful for you For a great explanation of MVC, check out Jeff Atwood's post: http://blog.codinghorror.com/understanding-model-view-controller/Now as for your app, one controller is just fine for displaying User's profile pages. What you
TAG : ruby
Date : November 17 2020, 11:55 AM , By : user2950590
Quitting method chain execution early
Quitting method chain execution early
this one helps. In this situation you probably want to raise an exception in the constructor if a required argument isn't supplied.If the argument is actually optional, you need to slightly rethink how you're structuring you program. You should drop
TAG : ruby
Date : November 17 2020, 11:52 AM , By : Roque Souza
Data scrapping with Nokokiri and Pismo
Data scrapping with Nokokiri and Pismo
I hope this helps . See Phrogz answer here: Nokogiri, open-uri, and Unicode Characters which I think correctly describes what is happening for you. In summary, for some reason there is an issue passing the IO object created by open-url to nokogiri. I
TAG : ruby
Date : November 17 2020, 11:52 AM , By : user2950235
Date format ends before converting entire input string
Date format ends before converting entire input string
wish helps you In the quoted error message, you have"SAMPLE_QTY"."TRANSACTION_DATE" = TO_DATE('2014-11-13 00:00:00 UTC','YYYY-MM-DD HH24:MI:SS')
TAG : ruby
Date : November 17 2020, 11:52 AM , By : mcousino
Rails 4: display values for lookups
Rails 4: display values for lookups
it fixes the issue I have a polymorphic lookups table that has columns value and display_value. Similar to how HTML select form elements work, the value is what is stored in the DB while the display_value is what is shown on screen to make it look "p
TAG : ruby
Date : November 16 2020, 06:23 AM , By : Exdata
Search for uppercased substring
Search for uppercased substring
seems to work fine You can't find the string which has the maximum length only through regex. You need to use some built-in Ruby functions.
TAG : ruby
Date : November 14 2020, 04:51 PM , By : Arif
Check params presence in Grape
Check params presence in Grape
it should still fix some issue Method doesn't work cause by default Grape provides even nil values in declared(params) hash. So if :color provided but :size is not, hash looks like {declared_params: {color: 'green', size: nil}}, which is not acceptab
TAG : ruby
Date : November 14 2020, 04:51 PM , By : user2948528
How to create a method that checks if string1 can be rearranged to equal string2?
How to create a method that checks if string1 can be rearranged to equal string2?
will help you Update: As @eugen pointed out in the comment, there's a much more efficient way:
TAG : ruby
Date : November 14 2020, 04:48 PM , By : Facundo
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