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Python Read File: A Step-By-Step Guide

The open() function opens a file. You must use the “r” mode to read a file. The read(), readline(), readlines() functions return the contents of a file you have opened. Python is a useful programming language to use if you…

How to Use Substring in JavaScript

The JavaScript substring() method retrieves a range of characters between two index positions. You can use substring() to retrieve characters to the end of a string by omitting an end index position. A substring is a smaller portion of a…

JavaScript Filter: A Step-By-Step Guide

The JavaScript() filter method creates an array of elements from an existing array. The filter() method accepts a callback function as an argument. This function evaluates whether an element should be added to the new list from the existing one.…

Python Input: A Step-By-Step Guide

The Python input() and raw_input() functions are used to collect user input. input() has replaced raw_input() in Python 3 and onward. Both functions return a user input as a string. Processing user input is a crucial part of programming. For…

Python Break and Continue: Step-By-Step Guide

The Python break statement stops the loop in which the statement is placed. A Python continue statement skips a single iteration in a loop. Both break and continue statements can be used in a for or a while loop. You…

Python Append to List: A Step-By-Step Guide

The append() Python method adds an item to the end of an existing list. The append() method does not create a new list. Instead, original list is changed. append() also lets you add the contents of one list to another…

Enumerate Python: Step-by-Step Guide

The Python enumerate() function adds a counter to an iterable object. The counter lets you keep track of how many iterations have occurred. This counter is stored as a separate variable. The Python programming language has several useful features that…

How to Use JavaScript Functions: A Step-By-Step Guide

JavaScript functions are custom blocks of code that can be reused. Functions allow code to be more modular and are essential to object-oriented programming. Functions can be defined through declarations or expressions. If you’re trying to learn JavaScript and looking…

Python Array: A Step-By-Step Guide

Python arrays are a data structure like lists. They contain a number of objects that can be of different data types. In addition, Python arrays can be iterated and have a number of built-in functions to handle them. Python has…

Python Queue and Deque: A Step-By-Step Guide

Python queue is a built in library that allows you to create a list that uses the FIFO rule, first in first out. Python deque uses the opposite rule, LIFO queue, or last in first out. Both operate on stacks…

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