Multi-Line Comments in Ruby?
This is how it looks (via screenshot) – otherwise it’s hard to interpret how the above comments will look. Click to Zoom-in:
ruby
No implicit conversion of String into Integer (TypeError)?
Write as Your @getsystemid is not a Hash, it is an Array of Hash. @getsystemid[0] will give you the intended hash {“id”=>1000010466, “name”=>”cfme038”, “last_checkin”=>#}. Now you can use Hash#[] method to access the value of the hash by using its keys.
Difference between $stdout and STDOUT in Ruby
$stdout is a global variable that represents the current standard output. STDOUT is a constant representing standard output and is typically the default value of $stdout. With STDOUT being a constant, you shouldn’t re-define it, however, you can re-define $stdout without errors/warnings (re-defining STDOUT will raise a warning). for example, you can do: Same goes for $stderr and STDERR So, to answer the other part of your question, use the global variables … Read more
What is the canonical way to trim a string in Ruby without creating a new string?
I guess what you want is: The #strip! method will return nil if it didn’t strip anything, and the variable itself if it was stripped. According to Ruby standards, a method suffixed with an exclamation mark changes the variable in place. Hope this helps. Update: This is output from irb to demonstrate:
How to convert a string to lower or upper case in Ruby
Ruby has a few methods for changing the case of strings. To convert to lowercase, use downcase: Similarly, upcase capitalizes every letter and capitalize capitalizes the first letter of the string but lowercases the rest: If you want to modify a string in place, you can add an exclamation point to any of those methods: … Read more
Ruby ‘require’ error: cannot load such file
I just tried and it works with require “./tokenizer”. Hope this helps.
How to add to an existing hash in Ruby
If you have a hash, you can add items to it by referencing them by key: Here, like [ ] creates an empty array, { } will create a empty hash. Arrays have zero or more elements in a specific order, where elements may be duplicated. Hashes have zero or more elements organized by key, … Read more
No such file or directory @ rb_sysopen ruby
The file_name contains the newline character \n at the end, which won’t get printed but messes up the path. You can fix the issue by stripping the line first: When debugging code, be careful with puts. Quoting its documentation reveals an ugly truth: Writes the given object(s) to ios. Writes a newline after any that … Read more
ERROR: While executing gem … (Gem::FilePermissionError)
I have checked all the other similar answers and none was exactly like mine, neither did any of those solutions work for me. gem environment and sudo gem environment give the same result: rvm -v : rvm 1.22.3 ruby -v : ruby 1.8.7 OSX 10.8.4 echo $PATH /usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin:/home/ava/.rvm/bin:/home/ava/bin gem install <gem-name> gives whereas I am … Read more
How do I parse JSON with Ruby on Rails? [duplicate]
I’m looking for a simple way to parse JSON, extract a value and write it into a database in Rails. Specifically what I’m looking for, is a way to extract shortUrl from the JSON returned from the bit.ly API: And then take that shortUrl and write it into an ActiveRecord object associated with the long … Read more