While working with data filtering, we may need to remove all non-numeric characters from a string. Programming languages provides various methods to do that. A table includes a links to...

While working with text processing, we may need to reverse a string. This means to change the order of the characters in backward direction. Programming languages provides various methods to...

Go is a programming language developed by Google. It's an open-source, statically typed, compiled language. This tutorial shows how to install Go on Raspberry Pi. Install Go Connect to Raspberry...

XML (eXtensible Markup Language) is a plain text format for representing structured data. While working with data validators we may need to check if a string is valid XML. Programming...

The pngquant is a tool that allows to compress PNG images via command line. On Raspberry Pi, use the APT package manager to install pngquant unless you want to install...

While working with file system, we may need to check if a file or directory exists. Programming languages provides various methods to do that. A table includes a links to...

While working with file system, we may need to append text to a file. Programming languages provides various methods to do that. A table includes a links to posts with...

ExifTool is a command line tool for reading, writing and updating metadata of media files like images, video, audio, and PDF. It is a cross-platform tool that requires the Perl...

JSON is a text-based data format that commonly used to store or transmit data objects between systems. While working with data validators we may need to check if a string...

While working with data filtering, sometimes we may need to check if a string contains a substring. Programming languages provides various methods to do that. A table includes a links...