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You are here: Home » Debugging

Remote Debugging Tutorial using gdb Debugger

Varun January 16, 2016 Remote Debugging Tutorial using gdb Debugger2016-01-16T13:36:08+05:30 Debug No Comment
In This article we will discuss, how to do remote debugging a C++ application using gdb debugger. (more…)
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How to attach gdb with running process

Varun January 10, 2016 How to attach gdb with running process2016-01-10T14:38:40+05:30 Debug No Comment
In this article we will discuss how to debug a running application. (more…)
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Debugging Multi-threading Applications with gdb debugger

Varun January 10, 2016 Debugging Multi-threading Applications with gdb debugger2016-01-10T14:38:18+05:30 Debug No Comment
In this article we will discuss how to debug multi-threading C++ application using gdb debugger. (more…)
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Conditional Breakpoints and watchpoints | gdb debugger Tutorial and examples

Varun December 7, 2015 Conditional Breakpoints and watchpoints | gdb debugger Tutorial and examples2015-12-07T12:17:58+05:30 Debugging No Comment
Conditional Breakpoints Adding a simple breakpoint at a line will stop the running programming whenever that line of code is hit. But this might not be the requirement every time.…
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Breakpoints and Backtrace traversal – gdb debugger Tutorial & Examples

Varun December 6, 2015 Breakpoints and Backtrace traversal – gdb debugger Tutorial & Examples2015-12-06T11:10:29+05:30 Debugging No Comment
In this article we will discuss how to use breakpoints in gdb and check backtrace etc. How to add breakpoints in gdb Breakpoints can be added only at "gdb" prompt…
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Compiling C++ with Debug Symbols – gdb debugger Tutorial & Examples

Varun December 5, 2015 Compiling C++ with Debug Symbols – gdb debugger Tutorial & Examples2015-12-06T11:10:25+05:30 C++ Debug No Comment
In this article we will discuss how to build a C++ / C code in debug mode and how to start the debugging using gdb. (more…)
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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
  • How to find all indexes of an item in a List ?
  • Count elements in a list, lists of lists or nested list
  • Remove Duplicates from a List
  • Convert a list to string
  • Remove element from a list by value or Index
  • Remove multiple elements from list
  • Count elements in a list that satisfy certain conditions

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 : How to get all keys with maximum value in a Dictionary
  • How to Merge two or more Dictionaries in Python ?

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

Python : Functions

  • *args | Pass multiple arguments to function
  • **kwargs | Pass variable length key value pair as arguments to Function
  • Unpack list, tuple or dictionary to Function arguments
  • Why do we need Lambda functions in Python ? | Explained with examples.
  • How to use if, else if & else in Lambda Functions
  • How to use global variables in a function ?
  • Python : map() function explained with examples
  • Delete elements from a Numpy Array by value or conditions in Python
  • Python : filter() function | Tutorial & Examples
  • Python : max() function explained with examples
  • Python : min() function Tutorial with examples

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

Pandas

  • Create DataFrame from dictionary in pandas
  • Get list of column and row names in DataFrame
  • Change Column & Row names in DataFrame
  • Select Rows & Columns using loc & iloc in DataFrame
  • Select Rows based on conditions
  • Drop rows in DataFrame by index labels
  • Drop rows in DataFrame by conditions on column values
  • Drop columns in DataFrame by label Names or Position
  • Add new columns in a dataFrame
  • How to add rows in a DataFrame
  • Count NaN or missing values in DataFrame
  • Convert lists to a dataframe
  • Find & Drop duplicate columns in a DataFrame
  • Create an empty DataFrame and add data to it later
  • Pandas : Check if a DataFrame is empty in Python
  • Pandas : Find duplicate rows in a Dataframe based on all or selected columns using DataFrame.duplicated() in Python
  • Pandas : skip rows while reading csv file to a Dataframe using read_csv() in Python
  • pandas.apply(): Apply a function to each row/column in Dataframe
  • Pandas: Sort rows or columns in Dataframe based on values using Dataframe.sort_values()
  • Pandas: Find maximum values & position in columns or rows of a Dataframe
  • Pandas : How to Merge Dataframes using Dataframe.merge() in Python – Part 1
  • Pandas : Merge Dataframes on specific columns or on index in Python – Part 2
  • Pandas : How to merge Dataframes by index using Dataframe.merge() – Part 3
  • Pandas : count rows in a dataframe | all or those only that satisfy a condition
  • Pandas : Read csv file to Dataframe with custom delimiter in Python
  • Pandas : 6 Different ways to iterate over rows in a Dataframe & Update while iterating row by row
  • Pandas : Loop or Iterate over all or certain columns of a dataframe
  • Get minimum values in rows or columns & their index position in Dataframe using Python
  • Apply a function to single or selected columns or rows in Dataframe
  • Sort a DataFrame based on column names or row index labels using Dataframe.sort_index() in Pandas
  • Pandas : Drop rows from a dataframe with missing values or NaN in columns
  • Get unique values in columns of a Dataframe in Python
  • Change data type of single or multiple columns of Dataframe in Python
  • Check if a value exists in a DataFrame using in & not in operator | isin()
  • Select first or last N rows in a Dataframe using head() & tail()

Numpy

  • Create a numpy array from list, tuple or list of lists
  • Find the index of value in Numpy Array
  • Select element or sub array by index from numpy array
  • Select rows / columns by index from a 2D numpy array
  • Select elements by conditions from Numpy Array
  • Create a Numpy Array of evenly spaced numbers
  • How to append elements to a Numpy Array
  • Find max value & it’s index in Numpy Array | numpy.amax()
  • Find unique values in a numpy array with frequency & indices
  • numpy.where() : Tutorial & Examples | Python
  • numpy.zeros() & numpy.ones() | Create a numpy array of zeros or ones
  • Create Numpy Array of different shapes & initialize with identical values using numpy.full()
  • numpy.amin() | Find minimum value in Numpy Array and it’s index
  • numpy.linspace() | Create same sized samples over an interval in Python
  • Delete elements, rows or columns from a Numpy Array by index positions using numpy.delete() in Python
  • How to get Numpy Array Dimensions using numpy.ndarray.shape & numpy.ndarray.size() in Python
  • Sorting 2D Numpy Array by column or row in Python
  • How to Reverse a 1D & 2D numpy array using np.flip() and [] operator in Python
  • How to save Numpy Array to a CSV File using numpy.savetxt() in Python
  • What is a Structured Numpy Array and how to create and sort it in Python?
  • How to sort a Numpy Array in Python ?

Python: Date Time Tutorials

  • Convert a timestamp string to a datetime object
  • Get Current date and timestamp
  • Get Last Modification date & time of a file

C++11 – Utilities

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

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 – 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 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

Callbacks in C++

  • Function Pointers
  • Function Objects & Functors

Design Patterns

  • Behavioral Design Patterns
    • Observer Design Pattern
    • State Design Pattern
    • Strategy Design Pattern
  • Structural Design Patterns
    • Composite Design Pattern
    • Flyweight Design Pattern
  • Creational Design Patterns

Pointers

  • Pointer vs Refrence
  • Allocating 2D Array Dynamically

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

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

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

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