mdaftab88

SHORTCUTS

Key/Command	Description
Tab	Auto-complete files and folder names
Ctrl + A	Go to the beginning of the line you are currently typing on
Ctrl + E	Go to the end of the line you are currently typing on
Ctrl + U	Clear the line before the cursor
Ctrl + K	Clear the line after the cursor
Ctrl + W	Delete the word before the cursor
Ctrl + T	Swap the last two characters before the cursor

mdaftab88

Kafka 0.11.0.0 (Confluent 3.3.0) added support to manipulate offsets for a consumer group via cli kafka-consumer-groups command.

1. List the topics to which the group is subscribed

kafka-consumer-groups --bootstrap-server <kafkahost:port> --group <group_id> --describe

Note the values under "CURRENT-OFFSET" and "LOG-END-OFFSET". "CURRENT-OFFSET" is the offset where this consumer group is currently at in each of the partitions.

2. Reset the consumer offset for a topic (preview)

mdaftab88

# to undo a git push
git push -f origin HEAD^:master

# to get to previous commit (preserves working tree)
git reset --soft HEAD

# to get back to previous commit (you'll lose working tree)
git reset --hard HEAD^

mdaftab88

<command>
    <ident value="only_if">
      <pos line="38" column="2"/>
    </ident>
    <args_add_block value="false">
      <args_add>
        <args_new/>
        <string_literal>
          <string_add>
            <string_add>

mdaftab88

# Client id from Google Developer console
# Client Secret from Google Developer console
# Scope this is a space seprated list of the scopes of access you are requesting.

# Authorization link.  Place this in a browser and copy the code that is returned after you accept the scopes.
https://accounts.google.com/o/oauth2/auth?client_id=[Application Client Id]&redirect_uri=urn:ietf:wg:oauth:2.0:oob&scope=[Scopes]&response_type=code

# Exchange Authorization code for an access token and a refresh token.

curl \

mdaftab88

Ruby Object Model

Ruby version 2.4.1

BasicObject

 > BasicObject.public_instance_methods(false)
 => [:!, :==, :!=, :__send__, :equal?, :instance_eval, :instance_exec, :__id__]

mdaftab88

TIL - Today I Learned

Wednesday, 11/20/19

Explaining require and permit: params.require(:person).permit(:name, :age)

The params in a controller looks like a Hash, but it's actually an instance of ActionController::Parameters, which provides several methods such as require and permit.

The require method ensures that a specific parameter is present, and if it's not provided, the require method throws an error. It returns an instance of ActionController::Parameters for the key passed into require.

mdaftab88

TIL - Today I Learned

Sunday, 25 April 2021

Rails Polymorphic Associations

Sunday, 02 May 2021

1. How to give a line break in a markdown file
   Just add two spaces at the end of the line. It worked for me. :)
2. BEGIN in Ruby.

mdaftab88

Originally published in June 2008

When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.

To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.

What to expect

Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.

mdaftab88

#!/usr/bin/env ruby
# sc - screenshot utility using imagemagick 'import'

# Aftab: See this link: https://qr.ae/pGyZ0V
require 'optparse'
require 'ostruct'
require 'shellwords'
require 'fileutils'

viewers = {