Skip to content

Instantly share code, notes, and snippets.

View claytonjwong's full-sized avatar
🚂
🚂 I think I can... 🚂 I think I can... 🚂 I think I can...

Clayton Wong claytonjwong

🚂
🚂 I think I can... 🚂 I think I can... 🚂 I think I can...
View GitHub Profile
/*
* Kotlin version of C++ equal_range via lower_bound and upper_bound
*
* Gist: https://gist.github.com/claytonjwong/2f9c3b33f8697d77a1d442006d4947d6
*/
fun lowerBound(A: IntArray, target: Int): Int {
val N = A.size
var i = 0
var j = N
/*
Heap Property:
* MinHeap: For every object x, the key of x is <= the keys of its children
* MaxHeap: For every object x, the key of x is >= the keys of its children
----------------------------------------------------------------------------------------------------
Insert:
@claytonjwong
claytonjwong / binarySearch.js
Last active June 30, 2022 16:55
Javascript version of C++ equal_range via lower_bound and upper_bound
/*
* Javascript version of C++ equal_range via lower_bound and upper_bound
*
* Gist: https://gist.github.com/claytonjwong/53bd1c1489b12eccad176addb8afd8e0
*/
let lowerBound = (A, T) => {
let N = A.length,
i = 0,
j = N;
@claytonjwong
claytonjwong / 2d_arrays.md
Last active May 6, 2022 22:51
2-dimensional arrays

2-Dimensional Arrays

How to create and initialize 2D arrays of integers with:

  • M rows
  • N columns
  • X initial value

C

int dp[M][N] = { [0 ... M-1] = { [0 ... N-1] = X } };
template< typename T >
class Solution
{
using Vector = vector< T >;
using Iter = typename Vector::iterator;
Vector go( Vector&& A )
{
auto N{ A.size() };
if( N < 2 ) return A;
@claytonjwong
claytonjwong / bubble-sort.cpp
Last active August 19, 2022 21:19
bubble sort
//
// BUBBLE-SORT
//
// loop-invariant:
//
// the right-most i elements are the largest i elements in A[0:N), 0<=i<N
// sorted in ascending order
//
void bubble_sort1(vector<int>& A){
bool swapped;