Introduction
This example shows how to use the Iguana APIs to deal with large files, that need to be processed a little bit at a time. We use use the builtin io.xxx file functions the stream.lua module that contains a range of streaming functions for use with large files, sockets, pipes, etc.
If you have any questions please contact us at support@interfaceware.com.
Using the Code [top]
- Import the Streaming File Operations channel from the Builtin: Iguana Files repository
- Experiment with the code to find out how it works
- Then add the module to your Translator project
- Copy the require statement from the channel and add it at the top of your script
Note: This module uses require to return a table - Adapt the code to your own requirements
- Interactive scripting help is included for this module
This is the github code for the main module:
How it works [top]
The code is fairly simple:
- We use the
stream.toFile()function to stream some sample data to a file - Then we open the file we create with
io.open() - Next process it line by line using an iterator returned from
io.lines() - Finally we process the data as fixed length by using
io.read()to repeatedly read 7 characters
More information [top]
- Source code for the main module on github
- Source code for the stream.lua module on github
- API documentation for io.open, io.read, io.close and iguana.workingDir