georgismitev

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

georgismitev

require 'base64'
require 'open-uri'
require 'net/http'
require 'net/https'
require 'json'

class OCR
  attr_reader :api_key, :image_url

  def self.scan(api_key:, image_url:)

georgismitev

Using Google Cloud Vision API's OCR to extract text from photos and scanned documents

Just a quickie test in Python 3 (using Requests) to see if Google Cloud Vision can be used to effectively OCR a scanned data table and preserve its structure, in the way that products such as ABBYY FineReader can OCR an image and provide Excel-ready output.

The short answer: No. While Cloud Vision provides bounding polygon coordinates in its output, it doesn't provide it at the word or region level, which would be needed to then calculate the data delimiters.

On the other hand, the OCR quality is pretty good, if you just need to identify text anywhere in an image, without regards to its physical coordinates. I've included two examples:

####### 1. A low-resolution photo of road signs

georgismitev

package main

// These benchmarks are used to compare how fast it is to read a set of space separated numbers from a string
// using different techniques.

// The primary motiviation for this came when writing some code for hackerrank and realizing that the parsing of numbers
// for large input sets was actually the bottleneck
//
// For stable results, it is recommended to increase the runtime allocated for benchmarking, such as
// go test -v -run none -bench . -benchtime 5s

georgismitev

using System;
					
public class Program
{
	public class Heap
	{
		int[] heap;
		int elements;

		public void Swap(ref int a, ref int b)

georgismitev

using System;
					
public class Program
{
	public class Heap
	{
		int[] heap;
		int elements;
		
		//will have children nodes arr[2*i + 1] and arr[2*i + 2], 

georgismitev

#!/bin/bash
# Sometimes you need to move your existing git repository
# to a new remote repository (/new remote origin).
# Here are a simple and quick steps that does exactly this.
#
# Let's assume we call "old repo" the repository you wish
# to move, and "new repo" the one you wish to move to.
#
### Step 1. Make sure you have a local copy of all "old repo"
### branches and tags.

georgismitev

using System;

public class Program
{
	public class TreeNode
	{
		public int Value;
		public TreeNode Left;
		public TreeNode Right;
		public TreeNode(int val)

georgismitev

using System;

public class Program
{
	public class DoubleLinkedListNode
	{
		public DoubleLinkedListNode Next;
		public DoubleLinkedListNode Prev;
		public DoubleLinkedListNode Child;
		public int Value;

georgismitev

RAILS_ENV=production rake db:setup
# produces the error below.....hmmm.....it's a no-worky
psql:/yourprojectpath/yourproject/db/structure.sql:29: ERROR:  could not open extension control file "/usr/share/postgresql/9.1/extension/hstore.control": No such file or directory

# hstore postgresql extension needs to be installed, so....
sudo apt-get install postgresql-contrib

# now your extension should be available to enable so log in with psql
psql -d yourproject_production -U yourdbuser -W