vlad-bezden’s gists

vlad-bezden / max_elements_and_values.py

Created November 27, 2019 15:24

Finding and Locating Maximum Elements Using numpy

	import numpy as np

	students = ["Alice", "Bob", "Carl", "David"]
	subjects = ["Math", "Physics", "Biology"]
	# Quiz scores
	# - Columns -> subjects
	# - Rows -> students
	scores = np.array([[10, 8, 5], [6, 9, 8], [9, 9, 8], [7, 5, 9]])

	print("\nSubject and name of the student, and the highest score")

vlad-bezden / primes_generator.py

Created November 11, 2019 14:40

Prime numbers generator. Creates infinite list of prime numbers.

	from math import sqrt
	from itertools import count

	NUMBER_OF_PRIMES = 10


	def primes() -> int:
	"""Primes generator."""
	yield 2
	for x in count(3, step=2):

vlad-bezden / pairs.py

Created October 25, 2019 10:25

Splits iterable by pairs.

	print(zip([iter(range(20)] * 2))
	# output
	# (0, 1) (2, 3) (4, 5) (6, 7) (8, 9) (10, 11) (12, 13) (14, 15) (16, 17) (18, 19)

vlad-bezden / progress_bar.py

Created September 18, 2019 14:13

Progress bar implementation in Python

	from time import sleep

	def progress(percent=0, width=50):
	left = width * percent // 100
	right = width - left
	print('\r[', '#' * left, ' ' * right, ']',
	f' {percent:.0f}%',
	sep='', end='', flush=True)

	for i in range(101):

vlad-bezden / spinning_wheel.py

Last active September 18, 2019 13:56

spinning wheel to indicate a work in progress

	from itertools import cycle
	from time import sleep

	for frame in cycle(r'-\\|/'):
	print('\r', frame, sep='', end='', flush=True)
	sleep(0.2)

vlad-bezden / reverse.go

Created August 25, 2019 11:21

Example of reverse string in Go using strings.Builder. This function about 3 times faster than using string concatenation

	//Reverse reverses string using strings.Builder. It's about 3 times faster
	//than the one with using a string
	// BenchmarkReverse-8 3000000 499 ns/op 56 B/op 6 allocs/op
	func Reverse(in string) string {
	var sb strings.Builder
	runes := []rune(in)
	for i := len(runes) - 1; 0 <= i; i-- {
	sb.WriteRune(runes[i])
	}
	return sb.String()

vlad-bezden / pipeline.go

Created August 22, 2019 21:01

This example illustrates pipelines in Go. There are two channels. The first channel (channel A) is used for getting the random numbers from the first function and sending them to the second function. The second channel (channel B) is used by the second function for sending the acceptable random numbers to the third function. The third function i…

	package main

	import (
	"fmt"
	"math/rand"
	"os"
	"strconv"
	"time"
	)

vlad-bezden / preprocess_text.go

Created August 13, 2019 13:56

An example on how to cleanup text for text classification in ML

	package main

	import (
	"fmt"
	"regexp"
	"strings"
	)

	func preProcess(text string) string {
	// Find all chars that are not alphabet

vlad-bezden / scientificNotation.go

Created August 11, 2019 10:55

How to use scientific notation in Go and convert it from float64 to int

	/*
	By default Go interpreter scientific notation to float64.
	This example shows how to use scientific notation to declare int types.
	This example also shows how to reuse the same parameter in Printf function.
	*/

	package main

	import (
	"fmt"

vlad-bezden / twoSlicesDiffs.go

Created August 11, 2019 09:25

An example of how to find difference between two slices in Go. It uses map and empty struct (0 bytes) as a void to convert slice to map (kind of set).

	/*
	An example of how to find the difference between two slices.
	This example uses empty struct (0 bytes) for map values.
	*/

	package main

	import (
	"fmt"
	)

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