jdegand / codingbat-java

Coding Bat Java Solutions

CodingBat Java Solutions

My solutions to Coding Bat Java Problems.

Thoughts

• Recommended order to tackle problems - start with Map & Functional (Mostly self-contained with little relevance to other problems),Logic 1, String 1, Logic 2, Array 1, Warmup 1 and 2, String 2, AP-1, Recursion 1, Recursion 2, String 3, Array 2, and Array 3.
• The string-1 section relies too heavily on the substring method.
• I had most difficulty with array 3.
• I tackled AP-1 problems too late - AP-1 helps understanding some Array 2 & 3 problems easier.
• I wasn't going to bother with the warmup problems (since they give you solutions) but they actually help you solve some of the more difficult problems in the higher categories.
• A lot of my solutions were approaches that first came to mind.
• I did a lot of problems back to back at one time. I slowed down for the more difficult categories and did a fair amount of research to help solve some problems.
• There are poor directions for some problems.
• There is a decent variety of solutions to these problems out there.
• I didn't bother making classes and having proper formatted java code.

Useful Resources

• Baeldung - java string interpolation
• Stack Overflow - finding the max min value in an arrray of primitives using java
• Stack Overflow - counting occurrences of a key in a map in java
• Stack Overflow - converting arraylist integer into int
• Educative - how to left shift k elements of an array
• Stack Overflow - java break statement not working
• Stack Overflow - most efficient way to find smallest of 3 numbers
• Baeldung - java count chars
• Stack Overflow - how to remove single character from a string by index
• C Sharp Corner - get last characters of a string
• Baeldung - split string with multiple delimiters
• Stack Overflow - find the max of 3 in java with different data types
• Stack Overflow - determining if a list numbers are sequential
• YouTube - How to Shift Elements in an Array (Java) - Modified CodingBat Question
• Geeks for Geeks - split array 2 equal sum subarrays
• Stack Overflow - java parse int value from a char
• Stack Overflow - reverse a string
• Stack Overflow - issue with java regex b
• Stack Overflow - fastest way to sort an array of objects in java
• Tutorials Point - divide an array in half
• Stack Overflow - separate digits of an int number
• Stack Overflow - getting first character of each word in string array and its frequency
• Stack Overflow - remove null value from string array