Bijendra

List all installed versions of java.
 /usr/libexec/java_home -V
Matching Java Virtual Machines (10):
    20.0.2 (x86_64) "Oracle Corporation" - "Java SE 20.0.2" /Library/Java/JavaVirtualMachines/jdk-20.jdk/Contents/Home
    20.0.1 (x86_64) "Oracle Corporation" - "OpenJDK 20.0.1" /Library/Java/JavaVirtualMachines/jdk-20.0.1.jdk/Contents/Home
    19.0.1 (x86_64) "Oracle Corporation" - "OpenJDK 19.0.1" /Library/Java/JavaVirtualMachines/jdk-19.0.1.jdk/Contents/Home
    17.0.9 (x86_64) "Oracle Corporation" - "Java SE 17.0.9" /Library/Java/JavaVirtualMachines/jdk-17.jdk/Contents/Home
    11.0.19 (x86_64) "Oracle Corporation" - "Java SE 11.0.19" /Library/Java/JavaVirtualMachines/jdk-11.jdk/Contents/Home
    11.0.14 (x86_64) "Oracle Corporation" - "Java SE 11.0.14" /Library/Java/JavaVirtualMachines/jdk-11.0.14.jdk/Contents/Home
    1.8.381.09 (x86_64) "Oracle Corporation" - "Java" /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home

Bijendra

Rails 5.1+
Ruby 2.7

In .rspec file in project folder(app1), addd the below lines

--colour
--format html
--out rspec_results.html

Bijendra

ERROR 1267 (HY000): Illegal mix of collations (utf8_general_ci,IMPLICIT) and (utf8_unicode_ci,IMPLICIT) for operation '<>'

Database: MySQl
Rails application with ruby 2.5.7 and Rails 5.1.

Use case: While importing database from multiple .sql files into test db via rake tasks the collation_database parameter is giving issues. 
The .sql files contains seed data  which is inserted successfully.

While running rspec cases to update a given table, the error related to mix of collations is thrown in rspec logs. 
To resolve this issue, changes were done in database.yml file. below line was added to force the db import with specific encoding.

Bijendra

require 'nokogiri'
require 'httparty'
require 'byebug'

Bijendra

class String
  def self.add_methods(name)
    send(:define_method, name) {
      puts "you have create a new method and output will be displayed"
      }  
  end
end
String.add_methods("log_msg")
puts "str1".log_msg.inspect
#define_method is a private method on the class.

Bijendra

class Employee
  attr_accessor :emp_id, :emp_name, :emp_designation, :emp_department
  
  def assign_attributes(emp_data)
    emp_data.each do |k,v|
      self.send("#{k}=", v)
    end
  end  
end

Bijendra

class Employee  
  attr_accessor :emp_id, :emp_name, :emp_designation, :emp_department  
 end  

emp_data = { emp_id: 1, emp_name: "Employee1", emp_designation: "Level1", emp_department: "Manufacturing"} 
emp_obj = Employee.new  
emp_obj.emp_id = emp_data[:emp_id]  
emp_obj.emp_name = emp_data[:emp_name]  
emp_obj.emp_designation = emp_data[:emp_designation]  
emp_obj.emp_department = emp_data[:emp_department]  

Bijendra

#Force file syncronization and lock writes
mongo admin --eval "printjson(db.fsyncLock())"  
#Above line can be commented in case of large databases as it stops write operations while making a db dump for proper sync.

MONGODUMP_PATH="/usr/bin/mongodump"
MONGO_HOST="10.0.0.51"
MONGO_PORT="27017"
MONGO_DATABASE="cv_appcloud_btoc"
MONGO_SAVE="/home/vol/expin-dump/"
TIMESTAMP=`date +%F-%H%M`

Bijendra

Using gem aws-sdk for a ror application for uploading images to s3
Uploading images to a fixed bucket with different folders for each object or application.
The s3 keeps a limitation on the number of buckets creattion whereas there is no
limitation for content inside a bucket.

This code will upload image for a user to s3 using aws-sdk gem. The bucket and the image uploaded are made public 
so that the images uploaded are directly accessible. The input it takes is the image complete path 
where it is present, folder in which it should be uploaded and user_id for whom it should 
be uploaded.

Bijendra

https://sourcebits.basecamphq.com/projects/8128969-success-profiler/todo_items/145021887/comments