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You are here: Home » Binary Tree

Finding paths in a Binary Tree

Varun August 19, 2014 Finding paths in a Binary Tree2015-09-25T00:14:19+05:30 Binary Tree 1 Comment
Many times we need to search for some specific paths in a binary tree from top to bottom. Lets design a code to find out all paths in a binary…
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Binary Tree Traversal with Strategy design pattern and open-closed principle

Varun July 31, 2014 Binary Tree Traversal with Strategy design pattern and open-closed principle2015-09-25T00:14:20+05:30 Binary Tree 3 Comments
Many time we need to perform certain tasks on Binary trees. These tasks can be, Counting nodes that satisfy some criteria. Displaying all nodes in particular pattern like, printing expression…
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Python : List

  • Check if an item exists in List
  • Check if a list contains all the elements of other list
  • Create a List and initialize with values
  • How to Iterate over a List
  • Insert an element at specific index in List
  • Sort a list of tuples by 2nd Item
  • Sort a list of strings
  • Add an element in list | append() vs extend()
  • Check if all elements in a List are same
  • Merge / Join two or more lists
  • Remove Duplicates from a List
  • Convert a list to string
  • Remove element from a list by value or Index
  • Remove multiple elements from list

Python : Dictionary

  • Creating Dictionaries in Python
  • Iterating over Dictionaries in Python
  • Check if a key exists in Dictionary
  • Get list of all the keys in Dictionary
  • Get list of all the Values in a Dictionary
  • Remove multiple keys in Dictionary while Iterating
  • Remove a key from Dictionary
  • Add key/value pairs in Dictionary
  • Find keys by value in Dictionary
  • Sort a Dictionary by key or Value
  • Copy a dictionary | Shallow vs Deep Copy
  • Convert a list to dictionary
  • Filter a dictionary by conditions on keys or values

Python Strings

  • Access characters in string by index in Python
  • Iterate over the characters in string
  • How to Replace characters in a string ?
  • How to remove characters from a string by Index ?
  • How to pad strings with zero, space or some other character in Python
  • How to Compare Strings ? | Ignore case | regex | is vs == operator using Python
  • Find occurrence count & all indices of a sub-string in another string | including overlapping sub-strings
  • Check if a String contains a sub string & find it’s index | case insensitive
  • Find frequency of each character in string and their indices | Finding duplicate characters in a string
  • How to create multi line string objects in python ?
  • Count occurrences of a single or multiple characters in string and find their index positions

Java – Hashmap

  • What is Hashing and Hash Table?
  • Associating Multiple values with same Key
  • Remove elements while Iterating
  • Update the value of an existing key
  • Get all keys by a value in HashMap

Java – HashSet

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  • Create and add elements in a HashSet
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  • Search for an element in HashSet
  • Merge two HashSets
  • Initializing HashSet from an Array
  • Convert a HashSet into an Array
  • Merge an Array in a HashSet

Java Interview Questions

  • Method Overriding Tutorial
  • Overriding with Different Return Type
  • Calling Base class’s overridden method
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C++11 – Utilities

  • Deleting Functions using ‘delete’ keyword
  • std::bind
  • auto specifier
  • Variadic Templates

C++11 – Unordered Set

  • 1.) unordered_set Basic Example
  • 2.) Initializing an unordered_set
  • 3.) Inserting elements in an unordered_set
  • 4.) Searching an element in unordered_set
  • 5.) unordered_set – Custom Hasher & Comparator
  • 6.) Unordered_set & User defined classes

C++11 – UnorderedMap

  • Basic Usage Detail and Example
  • Initializing an unordered_map
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  • Erasing an element
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  • std::map vs std::unordered_map

C++11 Smart Pointers

  • shared_ptr<> Tutorial and Examples
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  • weak_ptr Tutorial | shared_ptr and Cyclic References
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C++11 Multithreading

  • Part 1: Three Ways to Create Threads
  • Part 2: Joining and Detaching Threads
  • Part 3: Passing Arguments to Threads
  • Part 4 : Sharing Data & Race Conditions
  • Part 5 : Fixing Race Conditions using mutex
  • Part 6 : Need of Event Handling
  • Part 7: Condition Variables
  • Part 8: std::future and std::promise
  • Part 9: std::async Tutorial & Example
  • Part 10: std::packaged_task<> Tutorial

C++11 Rvalue References

  • lvalue vs rvalue
  • Is rvalue immutable in C++?
  • What is rvalue reference in C++11
  • Move Contsructor

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Pointers

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Callbacks in C++

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C++ Strings

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  • startsWith() Implementation
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  • Remove Sub Strings from String

C++ Memory Manangement

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Polymorphism

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STL – Vector

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  • 8.) Fill a vector with random numbers
  • 9.) Hidden cost of std::vector
  • 10.) Adding elements in Vector

STL – Deque

  • 1.) What is std::deque and how deque works internally.
  • 2.) deque vs vector : What to choose ?

STL – List

  • 1.) std::list Internals & Usage Details
  • 2.) List vs Vector
  • 3.) Different ways to Initialize a list
  • 4.) Erase elements using iterators
  • 5.) Remove elements while Iterating
  • 6.) Remove elements based on External Criterion
  • 7.) Get element by index in List
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STL – Set

  • 1.) C++ Set basic example and Tutorial
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  • 3.) std::set and external Sorting criteria | Comparator
  • 4.) Access Element by index in Set
  • 5.) How to insert elements in Set
  • 6.) How to iterate over a Set
  • 7.) Removing an element from Set
  • 8.) Erase elements while Iterating & Generic erase_if()

STL – Map

  • 1.) std::map Usage Detail with examples
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  • 4.) Set vs Map
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STL Multimap

  • MultiMap Example and Tutorial
  • multimap::equals_range – Tutorial

STL Algorithms

  • std::sort Tutorial & Example
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  • 1.) Using std::find & std::find_if with User Defined Classes
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