Tag: the
C++11 Smart Pointer – Part 5: shared_ptr, Binary trees and the problem of Cyclic References
Main advantage of shared_ptr is that it automatically releases the associated memory when not used any more. But if we don’t use shared_ptr carefully then this advantage can turn into a disadvantage. Let’s look how, Advertisements Suppose I have to design a binary tree and in it the node contains a pointer to left and …
Designing Code to Convert the base of a Number to any other base in Number System
In this article we will discuss how to design a Class that represents the Number in a Number System and also provides the facility to convert the Base associated with that Number i.e. conversion from any Base to any other base like, octal to hexa or hexa to decimal etc. [showads ad=inside_post] Create a class Number that …
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Designing a Thread Pool Framework Part 1: What’s the need of a Thread Pool
In this we will discuss what is a Thread pool and why do we need Thread Pools. Many times you encounter a situation where where you need to perform several tasks in parallel to improve the performance of application. These Tasks can be anything like, Advertisements Encrypting a file. Calculating hash of a file. Performing …
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Java : How to update the value of an existing key in HashMap | put() vs replace()
In this article we will discuss different ways to update the value of an existing key in HashMap in Java. Suppose we have a HashMap of words and their frequency count i.e. Advertisements // Create a Map of words and their frequency count HashMap<String, Integer> mapOfWords = new HashMap<String, Integer>() { { put(“John”, 25); put(“at”, …
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C++ : Get the list of all files in a given directory and its sub-directories using Boost & C++17
In this article we will discuss how to fetch the recursive list of all files in a given directory using Boost and C++17 FileSystem Library. Suppose we have a directory i.e. Advertisements /home/user/study/tutorials and I want list of all files in this directory and its sub directories, but also want to skip certain directory like …
Python : Check if a list contains all the elements of another list
In this article we will discuss if a list contains all or any elements of another list. Suppose we have have two list i.e. Advertisements # List of string list1 = [‘Hi’ , ‘hello’, ‘at’, ‘this’, ‘there’, ‘from’] # List of string list2 = [‘there’ , ‘hello’, ‘Hi’] Check if list1 contains all elements of …
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Python : How to create a list of all the Values in a dictionary ?
In this article we will discuss how to create a list of all the values in dictionary. Suppose we have a dictionary of string and integers i.e. Advertisements # Dictionary of string and int wordFreqDic = { “Hello”: 56, “at” : 23 , “test” : 43, “this” : 2, “here” : 23, “city” : 2, …
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python : How to create a list of all the keys in the Dictionary ?
In this article we will discuss how to create a list of all keys in a dictionary. Suppose we have a dictionary of string and integers i.e. Advertisements # Dictionary of string and int wordFreqDic = { “Hello”: 56, “at” : 23 , “test” : 43, “this” : 78, “here” : 18, “city” : 2, …
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Python : How to iterate over the characters in string ?
In this article we will discuss different ways to iterate or loop over all the characters of string in forward, backward direction and also by skipping over certain characters. Iterate over string using for loop Iterating over the string is simple using for loop and in operator i.e. Advertisements sampleStr = “Hello!!” print(“**** Iterate over …
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Python : How to get the list of all files in a zip archive
In this article we will discuss different ways to get detail about all files in a zip archive like file’s name & size etc. Get the name of all files in the ZIP archive using ZipFile.namelist() In Python’s zipfile module, ZipFile class provides a member function to get the names of all files in it …
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