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nkapliev / getftree.sh
Created June 28, 2016 16:12
Amazing fractal tree on bash
# @see https://www.hackerrank.com/challenges/fractal-trees-all
# Creating a Fractal Tree from Y-shaped branches
#
# This challenge involves the construction of trees, in the form of ASCII Art.
#
# We have to deal with real world constraints, so we cannot keep repeating the pattern infinitely.
# So, we will provide you a number of iterations, and you need to generate the ASCII version
# of the Fractal Tree for only those many iterations (or, levels of recursion). A few samples are provided below.
#
# Input Format
@nkapliev
nkapliev / Makefile
Last active March 19, 2020 12:10
Linux kernel 4.4+ netfilter packet capturing boilerplate.
obj-m += ip_mac_packet_logger.o
all:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
clean:
make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
install:
insmod ip_mac_packet_logger.ko
@nkapliev
nkapliev / test_1.cpp
Last active December 7, 2017 12:50
Compilation error if field class does not have default constructor and the field was not initialized during pre-constructor initialization.
#include <iostream>
class Point {
public:
int x;
int y;
Point() {
std::cout << "A point has been initialized by default constructor" << std::endl;
@nkapliev
nkapliev / getCharsWidth.html
Last active February 16, 2017 06:35
How to compute chars width? 2 ways: DOM & Canvas
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
</head>
<body>
<script>
var getTextWidthDOM = function(text, fontStyle) {
(function(x/**/) {
(function(f){
(function a(){
try {
function b(i) {
if(
(''+(i/i)).length !== 1 ||
i % 20 === 0
) {
(function(){}).constructor('debugger')();
@nkapliev
nkapliev / gcd.js
Last active September 9, 2016 10:46
Greatest common divisor in Javascript @see: https://en.wikipedia.org/wiki/Binary_GCD_algorithm
var gcd = function(a, b) {
var coef = 1;
while (
a !== b &&
a !== 0 &&
b !== 0 &&
a !== 1 &&
b !== 1
) {
#include <iostream>
#include <stdio.h>
using namespace std;
class cStack
{
private:
int A[255];
int ptr;
public:
@nkapliev
nkapliev / range.js
Created April 18, 2016 14:41
js range
Array.apply(null, {length: N}).map(Number.call, Number)
for f in aaa*; do mv $f $(echo $f | sed 's/^aaa/bbb/g'); done