pmgupte’s gists

pmgupte / project-euler-06.php

Last active December 28, 2015 18:09

PHP solution to Project Euler problem # 6.

	<?php
	/**
	* Problem 6: Sum square difference
	*
	* The sum of the squares of the first ten natural numbers is,
	* 1^2 + 2^2 + ... + 10^2 = 385
	* The square of the sum of the first ten natural numbers is,
	* (1 + 2 + ... + 10)^2 = 552 = 3025
	* Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 − 385 = 2640.
	*

pmgupte / project-euler-05.php

Created November 19, 2013 07:01

PHP solution to Project Euler problem # 5.

	<?php
	/**
	* Problem 5: Smallest multiple
	*
	* 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.
	* What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?
	*/
	$evenlyDivisible = false;
	$limit = 20;
	for($i=$limit; !$evenlyDivisible; $i+=$limit) {

pmgupte / project-euler-04.php

Created November 19, 2013 07:00

PHP solution to Project Euler problem # 4.

	<?php
	/**
	* Problem 4: Largest palindrome product
	*
	* A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 × 99.
	* Find the largest palindrome made from the product of two 3-digit numbers.
	*/
	$largest=101;
	$l1 = $l2 = 999;
	for ($i=999; $i>=100; $i--) {

pmgupte / project-euler-03.php

Created November 19, 2013 06:59

PHP solution to Project Euler problem # 3.

	<?php
	/**
	* Problem 3: Largest prime factor
	*
	* The prime factors of 13195 are 5, 7, 13 and 29.
	* What is the largest prime factor of the number 600851475143 ?
	*/
	$n = 600851475143;
	$factor = 2;
	$lastFactor = 1;

pmgupte / array_in_array.php

Last active December 27, 2015 15:59

PHP function to check whether all elements from one array are present in another array.

	<?php
	/**
	* Check whether all elements from $needle array are present in $haystack array.
	* Works for single-dimentional arrays only.
	* If you use multi-dimentional arrays, result could be misterious.
	* @param array $needle
	* @param array $haystack
	* @return boolean true if all elements in $needle are found in $haystack. false otherwise.
	*/
	function array_in_array($needle, $haystack) {

pmgupte / project-euler-02-sol-2.php

Last active December 22, 2015 03:29

My PHP solution to Project Euler problem # 2 - http://projecteuler.net/problem=2 - Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ... By considering the terms in the Fibonacci sequence whose values do not exceed four m…

	<?php
	$n1 = 1;
	$n2 = 1;
	$n3 = $n1 + $n2;
	$sum = 0;
	while($n3 < 4000000) {
	$sum += $n3;
	$n1 = $n2 + $n3;
	$n2 = $n1 + $n3;
	$n3 = $n1 + $n2;

pmgupte / project-euler-01.php

Last active December 22, 2015 03:19

My PHP solution to Project Euler problem # 1 http://projecteuler.net/problem=1 If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Find the sum of all the multiples of 3 or 5 below 1000.

	<?php
	$sum = 0;
	for ($i = 0; $i < 1000; $i++) {
	if (!($i % 3) \|\| !($i % 5)) {
	$sum += $i;
	}
	}
	echo $sum;
	?>

pmgupte / git_commands.md

Last active August 20, 2019 11:23

List of commonly used git commands. I would update this list as I encounter other situations.

	Programming Laguages
	PHP - currenly my bread and butter is earned with this language only
	Javascript
	Ruby
	Editors
	Eclipse, with PDT - on ubuntu as well as windows. This is my preferred editor
	vim - only when working on terminal
	nodepad++ - only when working on windows
	Sublime Text 2 - trying this editor on linux as well as windows
	Source Code Control

pmgupte / grep_before_after

Created August 23, 2013 10:33

	# to get matching line and 5 lines before that
	grep -B 5 "pattern" file

	# to get matching line and 5 lines after that
	grep -A 5 "pattern" file

	# of course, you can combine -A and -B options together in single command. That's obvious.

	# if your -A and -B values are same, you need not specify both the options. use -C instead.
	grep -C 5 "pattern" file

Prabhas Gupte pmgupte

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