How to Reorder Data in Log Files using the Custom Sorting Algorithm?
You have an array of logs. Each log is a space delimited string of words. For each log, the first word in each log is an alphanumeric identifier. Then, …
C++ Coding Reference: std::accumulate() and examples
The Reduce in terms of Map-Reduce is often referring to reducing many values (vector) to a single value (scalar). In C++, the STL has a accumulate() method that allows …
C++ Coding Reference: sort() and stable_sort()
Nowadays, you don’t have to implement your sorting algorithms e.g. quicksort, selection sort, insertion sort etc by yourself. Most programming languages provide the functions/library to do the sorting efficiently, …
The C++ Function using STL to Check Duplicate Elements/Characters in Array/Vector/String
Let’s say we want to implement a C++ function based on STL containers to check if a given string contains duplicate characters, or a given vector/array contains duplicate elements. …
How to Find Positive Integer Solution for a Given Equation using Bruteforce, Two Pointer or Binary Search Algorithms?
Given a function f(x, y) and a value z, return all positive integer pairs x and y where f(x,y) == z. The function is constantly increasing, i.e.: f(x, y) …
How to Implement the instanceof in Javascript?
In Javascript, the operator instanceof is used to perform a test to check if the prototype property of a constructor apperas in the chain of the object’s prototype chain. …