ruby

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Use excel or an other editor to write data before importing (with foreign keys)

I am making a website in rails with a lot of data. This data was writen by my client on an Excel file. But开发者_Go百科 i have a problem, how to manage foreign keys?[详细]

2023-04-13 06:19 分类：问答
strange array behaviour?

I\'ve been practicing coding some algorithms (job interview time), and was coding the Huffman compression algorithm and ran into what seems like strange behaviour in the Ruby array class.[详细]

2023-04-13 06:10 分类：问答
Ruby Float Round Error Bug?

I am getting the following rounding error when I try to Unit test the class below: class TypeTotal attr_reader:cr_amount,:dr_amount,[详细]

2023-04-13 05:54 分类：问答
Ruby vs Scala - pros and contras of each one [closed]

As it currently stands, this question is not a good fit for our Q&A format. We expect answe开发者_如何转开发rs to be supported by facts, references,or expertise, but this question will likely[详细]

2023-04-13 05:49 分类：问答
Adding urls api keys in environment variable in ruby

I have a url that I am using in one of the controllers. Is there a better place to put this url? The url uses an API key and I was wondering if there is a better place to add this url and/or api key s[详细]

2023-04-13 05:45 分类：问答
explain one expression of Ruby Array uniq method

c = %w(a b c d) 1.8.7 :025 > c.uniq {|x|x[/^a/]} => [\"a\", \"b\"] 1.8.7 :026 > c.uniq {|x|x[/^b/]}[详细]

2023-04-13 05:41 分类：问答
Multiply every element of an n-dimensional array by a number in Ruby

In Ruby, is there a simple way to multiply every element in an n-dimensional array by a single number?[详细]

2023-04-13 05:38 分类：问答
rails new project_name using rvm

I use rvm in my rails project and specify gem versions in the Gemfile. However, my problem right now is different. I want to create a rails 3.1 project using rails new project_name but my current ver[详细]

2023-04-13 05:37 分类：问答
running " bundle install " command is failure

all, I use the below command after creating some files in a specific directory. It gets me a error message.[详细]

2023-04-13 05:26 分类：问答
Rails keeps telling me that it's not currently installed

I use rvm to manage different rubies and their gemsets. My shell is zsh with oh-my-zsh configured with basic settings. Enabled oh-my-zsh plugins are ruby, rails, osx, and git. Here\'s the command I us[详细]

2023-04-13 05:23 分类：问答