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Backtracking Patterns: https://lnkd.in/g9csxVa4

Sliding Window patterns: https://lnkd.in/gjatQ5pK

Sliding Windows on Strings Pattern: https://lnkd.in/gX8ebtnb

Two Pointers Patterns: https://lnkd.in/gBfWgHYe

Substring Problem Patterns: https://lnkd.in/gdGtE72g

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Resize root partition (or how to remove the default /home partition) on CentOS 7 online

This requires you to be able to ssh into the instance using the root user account and that no services be running as users out of /home on the target machine.

The examples are from a default installation with no customation-you NEED to know what you're working with for volumes/partitions to not horribly break things.

By default, CentOS 7 uses XFS for the file system and Logical Volume Manager (LVM), creating 3 partitions: /,/home and

Step 1 - Copy /home Contents (No need if you don't have any data there)

To backup the contents of /home, do the following:

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var i = 0, howManyTimes = document.links.length;
function f() {
	var text=document.links[i].href;
	console.log(text);
	if (text && text.endsWith(".doc")) {
    	document.links[i].click()
    	i++;
    	if( i < howManyTimes ){
	        setTimeout( f, 3000 );
	    }

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Types of problems

1. Single column, binary values -- classification problem
2. Single column, real values -- regression problem
3. Multiple Column, binary values -- multi classification (more than two classes)
4. Multiple column, real values -- regression problem
5. Multilabel -- classficiation (one sample belong to several class)

Evaluation Metrics

1. Binary Classification problem -- ROC AUC or simply AUC
2. Regression problem -- MSE (mean squared error)

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Pandas data manipulation best practices

• Use the brackets for selecting a column of data
• The loc indexer selects only by label while the iloc indexer selects only by integer location.
• Two additional indexers, at and iat, exist that select a single cell of a DataFrame. These provide a slight performance advantage over their analogous loc and ilocindexers.

>>> import numpy as np
>>> a = np.random.rand(10 ** 5, 5)
>>> df1 = pd.DataFrame(a)
>>> row = 50000

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Spacy Installation with GPU

• Install CUDA 10
• Install cuDNN 7.4
• Copy bin and include folder files from cuDNN to CUDA installation path.
• Install cython using pip
• Install fastrlock using conda
• Install cupy-cuda100 from pypi (with --no-deps)
• Install thinc using conda
• Install spacy using conda

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CMDER

http://cmder.net/

Theme

https://github.com/PandaTheme/Panda-Theme-Cmder

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Theme

jt -t onedork -fs 95 -tfs 13 -nfs 115 -cellw 88% -fs 12 -nfs 12 -ofs 11

Set default plotting style

nano ~/.ipython/profile_default/startup/startup.ipy

# import jtplot module in notebook
from jupyterthemes import jtplot

# choose which theme to inherit plotting style from

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Change permission

cacls Folder /G everyone:F /t

• /G grant access to the user
• everyone username
• F for full control
• /t recursive

Recursive Delete

rmdir Folder /Q /S

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Good To Know

• intern method
  • Java automatically interns string literals.
  • intern method is to be used on Strings constructed using new String()

  String s1 = new String("Hello");
  String s2 = new String("Hello").intern();
  if (s1 == s2) {

System.out.println("s1 and s2 are same");