Khan Academy: Text Compression

Statistics come front and center in this unit all about analyzing discrete data. Real-world situations yield data sets that the class then uses to tease out connections and conclusions. Beginning with the basic histogram and...

Using Lossy Compression to reduce a file size.

Lossless single image compression by using the algorithm run-length encoding (RLE).

Reducing the file size using Lossless and Lossy for file compression.

Practice your knowledge of CSS text properties.

A review of text and strings in JavaScript.

What is the limit of compression?

Computers store all files as binary data, long strings of 111s and 000s. Files represent all types of data: images, videos, documents, text files, spreadsheets, and applications. Files are stored as binary data.

Julius Caesar encrypted messages two thousand years ago. By knowing the techniques of deciphering a code--frequency analysis, known text, and brute force--one can begin to understand the three key aspects of data encryption, decryption,...

A review of DOM modification techniques including attributes, styles, class names, inner HTML/text.