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Varun February 21, 2016 2018-08-19T17:15:43+00:00

C++11 Unordered Map

Basic Usage Detail and Example
Initializing an unordered_map
Searching in unordered_map
Insert elements in unordered_map
Erasing an element
Erase elements while iterating
std::map vs std::unordered_map

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 Rvalue References

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

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 Smart Pointers

shared_ptr<> Tutorial and Examples
shared_ptr and Custom Deletor
shared_ptr vs raw pointer
Create shared_ptr objects carefully
weak_ptr Tutorial | shared_ptr and Cyclic References
unique_ptr<> Tutorial and Examples

C++11 Miscellaneous Topics

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

Callbacks in C++11

Function Pointers
Function Objects & Functors

Recent Posts

numpy.arange() : Create a Numpy Array of evenly spaced numbers in Python
Python Numpy : Select elements or indices by conditions from Numpy Array
Python Numpy : Select rows / columns by index from a 2D Numpy Array | Multi Dimension
Python : How to convert datetime object to string using datetime.strftime()
Python: How to unzip a file | Extract Single, multiple or all files from a ZIP archive
Python Numpy : Select an element or sub array by index from a Numpy Array
Python Numpy : Create a Numpy Array from list, tuple or list of lists using numpy.array()
Python : How to convert a timestamp string to a datetime object using datetime.strptime()
Python : How to get Current date and time or timestamp ?
Python : Check if a process is running by name and find it’s Process ID (PID)
Python : Get List of all running processes and sort by highest memory usage
Python : How to delete a directory recursively using shutil.rmtree()
Python : How to remove a file if exists and handle errors | os.remove() | os.ulink()
Python : How to remove files by matching pattern | wildcards | certain extensions only ?
Python : How to get Last Access & Creation date time of a file
Python : How to copy files from one location to another using shutil.copy()
Python : Get Last Modification date & time of a file. | os.stat() | os.path.getmtime()
Python : How to move files and Directories ?
How to check if a file or directory or link exists in Python ?
5 Different ways to read a file line by line in Python
Python Pandas : How to convert lists to a dataframe
Python Pandas : How to add rows in a DataFrame using dataframe.append() & loc[] , iloc[]
Python Pandas : Count NaN or missing values in DataFrame ( also row & column wise)
Python Pandas : How to add new columns in a dataFrame using [] or dataframe.assign()
Python Pandas : How to Drop rows in DataFrame by conditions on column values
Python Pandas : Drop columns in DataFrame by label Names or by Index Positions
Python Pandas : How to get column and row names in DataFrame
Python Pandas : How to drop rows in DataFrame by index labels
C++11 / C++14 : ‘delete’ keyword and deleted functions with Use Cases | Examples
Python Tuple : Append , Insert , Modify & delete elements in Tuple
Python : How to find an element in Tuple by value
Python Tuple: Different ways to create a tuple and Iterate over it
Python : **kwargs | Functions that accept variable length key value pair as arguments
Python : *args | How to pass multiple arguments to function ?
Python : How to unpack list, tuple or dictionary to Function arguments using * & **
Python Pandas : Select Rows in DataFrame by conditions on multiple columns
Select Rows & Columns by Name or Index in DataFrame using loc & iloc | Python Pandas
Python Pandas : Replace or change Column & Row index names in DataFrame
Python : How to convert a list to dictionary ?
Python : How to replace single or multiple characters in a string ?
Python : How to copy a dictionary | Shallow Copy vs Deep Copy
Python Pandas : How to create DataFrame from dictionary ?
Python : How to iterate over the characters in string ?
Python : How to Sort a Dictionary by key or Value ?
Python : How to access characters in string by index ?
C++ : How to find duplicates in a vector ?
Python : How to find keys by value in dictionary ?
Python : How to add / append key value pairs in dictionary using dict.update()
C++ : How to compare two vectors | std::equal() & Comparators
C++ : How to get element by index in vector | at() vs operator []

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

Design Patterns

Behavioral Design Patterns
Structural Design Patterns
- Composite Design Pattern
- Flyweight Design Pattern
Creational Design Patterns
- Factory Method Design Pattern

Tags

Binary Search Tree Binary Tree C++ C++ 11 c++11 c++11 Multithreading C++ 11 Multithreading c++ 11 Threads C++11 Threads C++ Interview Question C++ Interview Questions collections delete Design Pattern Design Patterns gdb gdb commands gdb Tutorial hashset home java Linked List linkedlist linux linux system programming method overriding Multithreading new Observer Design Pattern process python set shared_ptr Smart Pointer std::bind std::find std::map std::set std::thread std::vector STL STL Algorithm STL Interview Questions Strategy Design Pattern VECTOR

Data Struture

Binary Tree
Binary Search Tree
Linked List

gdb

1.) Compiling with Debug Symbols
2.) Breakpoints and Back trace traversal
3.) Conditional Breakpoints and watch points
4.) Debugging Multi-threading Applications
5.) Attach gdb with running process
6.) Remote Debugging Tutorial

Pointers

Pointer vs Refrence
Allocating 2D Array Dynamically

Polymorphism

Virtual Functions
vTable and vPointer

Method Overriding in Java

Method Overriding Tutorial
Overriding with Different Return Type
Calling Base class’s overridden method
Preventing Method Overriding
Need of preventing Method Overriding

Recent Posts

numpy.arange() : Create a Numpy Array of evenly spaced numbers in Python
Python Numpy : Select elements or indices by conditions from Numpy Array
Python Numpy : Select rows / columns by index from a 2D Numpy Array | Multi Dimension
Python : How to convert datetime object to string using datetime.strftime()

STL – Vector Tutorial

1.) What’s std::vector and why to use it?
2.) Different ways to initialize a vector
3.) How does std::vector works internally
4.) User Defined Objects & std::vector
5.) How to use vector efficiently in C++?
6.) std::vector and Iterator Invalidation
7.) Remove repeated elements from a vector
8.) Fill a vector with random numbers
9.) Hidden cost of std::vector
10.) Adding elements in Vector

STL – List Tutorial

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
8.) Searching an element in std::list
9.) Different Ways to iterate over a List
10.) Sorting a List & custom Comparator

STL – Deque

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

STL – Set Tutorial

1.) C++ Set basic example and Tutorial
2.) Using std::set with user defined classes
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 Tutorial

1.) std::map Usage Detail with examples
2.) std::map and Comparator
3.) std::map & User defined class objects as keys
4.) Set vs Map
5.) How to Iterate over a map in C++
6.) Map Insert Example
7.) Iterate a map in reverse order
8.) Check if a key exists in a Map
9.) Search by value in a Map
10.) Erase by Key | Iterators
11.) C++ Map : Operator []
12.) Erase by Value or callback
13.) copy all Values from a Map to vector

STL – MultiMap Tutorial

MultiMap Example and Tutorial
multimap::equals_range – Tutorial

STL Algorithms

std::sort Tutorial & Example
std::unique Tutorial & Example
1.) Using std::find & std::find_if with User Defined Classes
2.) Iterating over a range of User Defined objects and calling member function using std::for_each

C++ Interview Questions

Variable Arguments
Verify brackets or parentheses combination
Convert the base of a Number to any other base in Number System
Fibonacci Sequence without Recursion
Use OOPS to Display a sequence of numbers without any For-Loop or Recursion
Allocating and deallocating 2D arrays dynamically in C and C++
What’s std::vector and why should I use std::vector?
How does std::vector works internally ?
What is std::deque and how deque works internally.

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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

Python Strings

Access characters in string by index in Python
Iterate over the characters in string
How to Replace characters in a string ?

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

What is Hashing and Hash Table?
Create and add elements in a HashSet
Iterate over a HashSet
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
Preventing Method Overriding
Need of preventing Method Overriding

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
Searching in unordered_map
Insert elements in unordered_map
Erasing an element
Erase elements while iterating
std::map vs std::unordered_map

C++11 Smart Pointers

shared_ptr<> Tutorial and Examples
shared_ptr and Custom Deletor
shared_ptr vs raw pointer
Create shared_ptr objects carefully
weak_ptr Tutorial | shared_ptr and Cyclic References
unique_ptr<> Tutorial and Examples

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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Design Patterns

Behavioral Design Patterns
Structural Design Patterns
- Composite Design Pattern
- Flyweight Design Pattern
Creational Design Patterns
- Factory Method Design Pattern

Pointers

Pointer vs Refrence
Allocating 2D Array Dynamically

Callbacks in C++

Function Pointers
Function Objects & Functors

C++ Strings

Find and Replace all occurrences of a string
Find all occurrences of a sub string
Case Insensitive string::find
Convert First Letter of each word to Upper Case
Converting a String to Upper & Lower Case
Trim strings in C++
C++ : How to split a string using String and character as Delimiter?
startsWith() Implementation
endsWith() Implementation
Remove Sub Strings from String

C++ Memory Manangement

Memory Leaks
new and delete operator
delete vs []delete
Out Of Memory Errors
Overload new & delete
Restrict Dynamic Deletion
Placement new operator
Delete ‘this’ pointer

Polymorphism

Virtual Functions
vTable and vPointer

STL – Vector

1.) What’s std::vector and why to use it?
2.) Different ways to initialize a vector
3.) How does std::vector works internally
4.) User Defined Objects & std::vector
5.) How to use vector efficiently in C++?
6.) std::vector and Iterator Invalidation
7.) Remove repeated elements from a vector
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
8.) Searching an element in std::list
9.) Different Ways to iterate over a List
10.) Sorting a List & custom Comparator

STL – Set

1.) C++ Set basic example and Tutorial
2.) Using std::set with user defined classes
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
2.) std::map and Comparator
3.) std::map & User defined class objects as keys
4.) Set vs Map
5.) How to Iterate over a map in C++
6.) Map Insert Example
7.) Iterate a map in reverse order
8.) Check if a key exists in a Map
9.) Search by value in a Map
10.) Erase by Key | Iterators
11.) C++ Map : Operator []
12.) Erase by Value or callback
13.) copy all Values from a Map to vector

STL Multimap

MultiMap Example and Tutorial
multimap::equals_range – Tutorial

STL Algorithms

std::sort Tutorial & Example
std::unique Tutorial & Example
1.) Using std::find & std::find_if with User Defined Classes
2.) Iterating over a range of User Defined objects and calling member function using std::for_each

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