manojnaidu619

Keybase proof

I hereby claim:

• I am manojnaidu619 on github.
• I am manojkumar619 (https://keybase.io/manojkumar619) on keybase.
• I have a public key ASBRwy21N3auADlR8_n5A1M67ydjVsOAc6A56SOF6fKRiQo

To claim this, I am signing this object:

manojnaidu619

class ArticleImageUploader < ImageUploader

  process :fix_exif_rotation
  process :strip
  process :convert => 'jpg'
  process :quality => 85 # Percentage from 0 - 100

  version :gallery_thumb do
    process :resize_to_fill => Settings.images.article_images.processing.gallery_thumb #44x44
  end

manojnaidu619

N+1 query problem

• ORMs make it easy to a query per loop iteration, which we want to avoid

eager_load

• single query (left outer join)
• can reference the other table's columns in where

preload

• a few queries (one per table)
• typically faster

manojnaidu619

function subset(nums) {
    var result = [];
    dfs(0, [], nums, result);
    console.log(result);
}

function dfs(index, path, nums, res) {
    res.push([...path])
    for (var i = index; i < nums.length; i += 1){
        path.push(nums[i]);

manojnaidu619

const gridTraveler = (m, n, memo={}) => {
    const key = `${m},${n}`
    if (key in memo) return memo[key]
    if (m === 1 && n === 1) return 1
    if (m === 0 || n === 0) return 0
    memo[key] = gridTraveler(m - 1, n, memo) + gridTraveler(m, n - 1, memo)
    return memo[key]
}
console.log(2,2)  // 2
console.log(gridTraveler(18,18))  //2333606220

manojnaidu619

import pandas, os, random
import matplotlib.pyplot as plt
from datetime import datetime
from alpha_vantage.timeseries import TimeSeries
from alpha_vantage.cryptocurrencies import CryptoCurrencies

####### Values could be customized (Right now we are choosing random values) ############

CHARTDOMAIN = random.choice(['stock', 'cryptocurrency'])

manojnaidu619

######################
#
#  Monkey patch to ActiveRecord to prevent 'implicit' checkouts. Currently tested with Rails 4.0.8, prob
#  should work fine in Rails 4.1 too. 
#
#  If you create a thread yourself, if it uses ActiveRecord objects without
#  explicitly checking out a connection, one will still be checked out implicitly.
#  If it is never checked back in with `ActiveRecord::Base.clear_active_connections!`,
#  then it will be leaked. 
#

manojnaidu619

http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query
http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails

#payload: [{"kind"=>"person"}]
Segment.where("payload @> ?", [{kind: "person"}].to_json)

#data: {"interest"=>["music", "movies", "programming"]}
Segment.where("data @> ?",  {"interest": ["music", "movies", "programming"]}.to_json)
Segment.where("data #>> '{interest, 1}' = 'movies' ")
Segment.where("jsonb_array_length(data->'interest') > 1")

manojnaidu619

class Node:
  def __init__(self, data):
    self.data = data
    self.next = None

class LinkedList:
  def __init__(self):
    self.head = None

  def form_ll(self, length):

manojnaidu619

# Problem here -> https://www.geeksforgeeks.org/find-pythagorean-triplet-in-an-unsorted-array/

nums = [10, 4, 6, 12, 5]

found = False

for x in range(0, len(nums)): nums[x] *= nums[x]
nums.sort()
checker = len(nums) - 1