nikhilmetrani

#include <cstdint>

uint32_t fun(char *c1) {
    // if c1 is pointing to memory address 1004, it is aligned access
    // if its pointing to 1005, it us unalighed access
    // return *c1; // some systems do this
    // return c1[0] | c1[1] << 8; // some do this (worst than before)
    return  *((uint32_t*) c1); // This is the performance improvement, does not work on web assembly
}

nikhilmetrani

#include <bits/stdc++.h>
static auto fast_io = []() -> int {
  // Turn off synchronization between cout and cin.
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(nullptr);
  return 0;
}();

nikhilmetrani

#!/bin/sh

# Credits: http://stackoverflow.com/a/750191

git filter-branch -f --env-filter "
    GIT_AUTHOR_NAME='Newname'
    GIT_AUTHOR_EMAIL='new@email'
    GIT_COMMITTER_NAME='Newname'
    GIT_COMMITTER_EMAIL='new@email'
  " HEAD

nikhilmetrani

#!/bin/bash

# Install Quake 3: Arena on a mac

# Copyright (c) 2016 simonewebdesign
# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 

nikhilmetrani

// http://fig.cox.miami.edu/~cmallery/150/gene/chargaff.htm

const pairDNA = (() => {
  const basePairs = { A: 'T', T: 'A', C: 'G', G: 'C' };
  
  return dnaStr => dnaStr.split('').reduce((acc, nuc) => [...acc, [nuc, basePairs[nuc]]], []);
})();

pairDNA("GCG");

nikhilmetrani

const converter = (() => {
  const romanMap = [[1000, 'M'], [900, 'CM'], [500, 'D'], [400, 'CD'], [100, 'C'], [90, 'XC'],
    [50, 'L'], [40, 'XL'], [10, 'X'], [9, 'IX'], [5, 'V'], [4, 'IV'], [1, 'I']];
  
  const toRoman = num => {
    let remainingNum = num;
    return romanMap.reduce((roman, map) => {
      while (remainingNum % map[0] < remainingNum) {
        roman += map[1];
        remainingNum -= map[0];

nikhilmetrani

const countDuplicates = arr => arr.reduce((acc, el) => {
  acc[el] = (acc[el] || 0) + 1;
  return acc;
}, {});

countDuplicates(['a', 'a', 'b', 'c', 'd', 'd', 'd') // {a: 2, b: 1, c: 2, d: 3}