Guides/Keyed Files

Component Files | Keyed Files

Keyed Files (keyfiles)

A keyed file is a J component file in which the components are accessed using keywords. A keyword may be any character string.

Load the keyed file system with:

   load 'keyfiles'

This defines the main functions:

name	description
keycreate	create file
keydir	keyword directory
keyerase	erase file
keyread	read data for keyword
keywrite	write date for keyword

When reading: if keyword not found, return '' else return value.

When writing: if data='' then the keyword is deleted

For example:

   keycreate 'mydata'
1
   'Peter Rabbit' keywrite 'mydata';'name'
   'Lake District' keywrite 'mydata';'loc'
   
   keydir 'mydata'
loc  name
   keyread 'mydata';'loc'
Lake District