manojpandey

# Install script for opencv
sudo apt-get update
sudo apt-get install -y build-essential
sudo apt-get install -y cmake
sudo apt-get install -y libgtk2.0-dev
sudo apt-get install -y pkg-config
sudo apt-get install -y python-numpy python-dev
sudo apt-get install -y libavcodec-dev libavformat-dev libswscale-dev
sudo apt-get install -y libjpeg-dev libpng-dev libtiff-dev libjasper-dev
 

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Attack of Pythons

Among computer programmers, a “gotcha” has become a term for a feature of a programming language that is likely to play tricks on you to display behavior that is different than what you expect.

Just as a fly or a mosquito can “bite” you, we say that a gotcha can “bite” you. So, let's proceed to examine some of Python's gotchas !

---

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#List unique values in a DataFrame column
pd.unique(df.column_name.ravel())

#Convert Series datatype to numeric, getting rid of any non-numeric values
df['col'] = df['col'].astype(str).convert_objects(convert_numeric=True)

#Grab DataFrame rows where column has certain values
valuelist = ['value1', 'value2', 'value3']
df = df[df.column.isin(value_list)]

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#!/usr/bin/env ruby

require 'aws-sdk'
require 'json'

# add credentials here
akid = ""
secret_key = ""

Aws.config.update({

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# RGB to Lab conversion

# Step 1: RGB to XYZ
#         http://www.easyrgb.com/index.php?X=MATH&H=02#text2
# Step 2: XYZ to Lab
#         http://www.easyrgb.com/index.php?X=MATH&H=07#text7


def rgb2lab(inputColor):

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## 1st Sem
Percentage= 74.69%
Total Credits Secured= 27
Credit Percentage= 71.74%
Marks Obtained= 971/1300
College Rank= 99
University Rank= 278

## 2nd Sem
Percentage= 69.58%

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Hello, world!

Please explain in detail what will happen if the following program is executed:

#include <iostream>

int main() {
    std::cout << "Hello, world!" << std::endl;
}

manojpandey

Competitions:-

    https://www.kaggle.com/
    https://www.hackerearth.com/

Books:-

    Introduction to Algorithms By Thomas H Cormen
    Pattern Recognition and Machine Learning By Christopher M. Bishop
    Freakonomics By Steven D. Levitt and Stephen J. Dubner

manojpandey

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.

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