regex

Articles: 5

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Article

Guide to Regular Expressions and Matching Strings in JavaScript

Matching strings or string patterns can be a real struggle. In the most common cases, you'll need these to validate e-mails, user inputs, file names, or most kinds of input strings. While there are many pattern-matching libraries and approoaches - a time-tested approach is using Regular Expressions to define a...

Lazar Ristic

Aug 10, 2021

Article

Comparing Strings using Python

In Python, strings are sequences of characters, which are effectively stored in memory as an object. Each object can be identified using the id() method, as you can see below. Python tries to re-use objects in memory that have the same value, which also makes comparing objects very fast in...

Frank Hofmann

Aug 27, 2018·7 min read

Article

Using Regex for Text Manipulation in Python

Text preprocessing is one of the most important tasks in Natural Language Processing (NLP). For instance, you may want to remove all punctuation marks from text documents before they can be used for text classification. Similarly, you may want to extract numbers from a text string. Writing manual scripts for...

Usman Malik

Aug 17, 2018·14 min read

Article

Introduction to Regular Expressions in Python

In this tutorial we are going to learn about using regular expressions in Python, including their syntax, and how to construct them using built-in Python modules. To do this we’ll cover the different operations in Python's re module, and how to use it in your Python applications. Regular expressions...

Esther Vaati

Nov 21, 2017·9 min read

Article

Regex: Splitting by Character, Unless in Quotes

Many times when you're parsing text you find yourself needing to split strings on a comma character (or new lines, tabs, etc.), but then what if you needed to use a comma in your string and not split on it? An example of this could be a large number. So...

Scott Robinson

Sep 22, 2013·2 min read