The knapsack problem or rucksack problem is a problem in combinatorial optimization: Given a set of items, each with a weight and a value, determine the number of each item to include in a collection so that the total weight is less than or equal to a given limit and the total value is as large as possible. It derives its name from the problem faced by someone who is constrained by a fixed-size knapsack and must fill it with the most valuable items.
const x=54; const explisit=String(x); // explisit==="54" const implisit=x+""; // implisit==="54"
App development is about solving problems. There is a need in the world and an app may help to address it. What is that need?