About DolphinDB
Getting Started
Deployment
Deploy and upgrade DolphinDB on premise or in the cloud
Database
Core features of DolphinDB's distributed architecture, basic database operations, and configuration setup.
Streaming
Publish, subscribe to, and process streaming data
Migration
Import and migrate data from various data sources to DolphinDB databases
Maintenance
Database maintenance and system management
Troubleshooting
Common errors and corresponding solutions
Programming Guide
DolphinDB scripting language and SQL reference
Function References
Reference for all built-in functions
API & Connector
API in different languages for users to call DolphinDB from their programs
Plugins
Guidance on the use of plugins and plugin development for multiple application scenarios
Tutorials
Tutorials on database concepts and application scenarios
Release Notes
Release notes and compatibility changes for DolphinDB server, plugins and APIs

String Objects

Strings in DolphinDB use UTF-8 character encoding. We also have the following functions that support the use of regular expressions: regexFind, regexReplace, regexCount.

Note that regular expression standards used by DolphinDB vary depending on the operating system, as follows:

For Linux, Extended Regular Expressions (ERE) based on the POSIX standard is employed.
For Windows, ERE based on the C++ standard library is used.