Guides/Persistence

These topics discuss saving and loading J objects (in object-oriented sense and otherwise), individually or in groups, a technology also known as "persistence" or "serialization".

Regular Files

files: file access utilities, Base Library
1!:n Files (foreign), Dictionary
Files, J Primer

Special File Formats

csv: read/write comma-separated value data (*.csv) files, Base Library
csv: read/write comma-separated value data (*.csv) files, tables/csv addon
zip file utilities, arc/zip addon
Wave (*.wav) audio file, media/wav addon
Image (*.gif, *.jpg, *.png, etc) files, media/platimg addon

File Workspace

Workspaces in older J by Raul Miller, Why were workspace removed from J7.0 in comp.lang.apl, <<Date(1994-01-18T00:00:00)>>

J-file Workspace by Eke van Batenburg, Workspace in J in comp.lang.apl, <<Date(1997-03-24T00:00:00)>>

WS Files script by Oleg Kobchenko, based on J-file Workspace.

JOD Addon, J Object Dictionary by John Baker

Object Stream, costream script by Oleg Kobchenko

Object per File

By Devon McCormick, File J Variables (originally Utility contribution: WS.ijs - var->file, file->var in JForum, <<Date(2003-07-12T00:00:00)>>)

Component Files

Component files, Primer
Component Files (jfiles), J User Guide
jfiles: component file definitions, Base Library

Keyed Files

Keyed Files (keyfiles), J User Guide
keyed-file definitions, Base Library

NOTE: the 'keyfiles' library mentioned in the above pages has been merged into 'jfiles' so load that instead.

Memory-Mapped Files

Mapped Files, Lab
Memory Mapped Files in J, Papers
Mapped Boxed Arrays, Release Notes
jmf: mapped files, Base Library (BROKEN LINK -- j701 version)

Guides/Persistence

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