the1derer / problem-solving

Problem Solving

TODO

• Find factorial for big-numbers without using BigInteger/BigDecimal. (Hint: Multiply digits one by one and store in a string/arraylist);

• Learn ASCII

• Capitalize first letter of string using streams. ==> if no stream use subString

• Sort String in both order using streams.

• sort a collection of custom class using Comparator and not using Collections.sort --- https://www.hackerrank.com/challenges/java-sort/problem?isFullScreen=true

• implement singleton pattern --> see how you can keep track that only one object is created.

Problems in Question:

• https://www.hackerrank.com/challenges/java-iterator/problem?isFullScreen=true https://www.baeldung.com/java-stream-sum