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Articles tagged with #ruby
Sometimes I have this issue of parsing JSON that contains the string representation of Ruby hash for whatever reason. Problem It happens obviously because the hash string is not JSON. require 'json' hsh_as_str = '{"order_id"=>nil}' JSON.parse(hsh_as_...
By default, arrays of objects cannot be intersected in Ruby. By overriding eql?(other) and hash methods, we can make a Ruby object capable of intersecting. class Color attr_reader :name def initialize(name) @name = name end end # Both lis...
This is my memo about how to implement a Comparable class. The Comparable mixin is useful when we want class instances to be ordered. # By default, Ruby objects do not support sorting. class Language attr_reader :name def initialize(name) @n...
While the snake case Hash keys are conventionally used in Ruby world, sometimes we prefer camel case keys in the front end. Here is my note on how to handle this problem. Camelizing keys of outgoing JSON data A: using Hash#deep_transform_keys! hash.d...
I want to let user update user account info without password, unless he/she wants to change password. By default, devise requires the user to enter current password when user wants to change any field in the devise user model. Version of Ruby, Rail...
This is my memo about how to implement basic CSV import/export in a Rails app. Example Routes # GET /cities List with import and export buttons # GET /cities.csv Export csv # POST /cities/import Import csv resources :cities, only: :ind...