compare.ijs

This script defines comparison utilities and is included in the J standard library. Definitions are loaded into the jcompare locale with cover functions in z.

Definitions

compare (verb)

Compare character data.

Syntax

text1 compare text2

Arguments may be character strings or character matrices with trailing blanks ignored.

Result shows lines not matched, in form:

n [l] text

where:

  n = 0=left argument, 1=right argument
 [l] = line number
 text = text on line

fcompare (verb)

Compare two text files.

Syntax

opt fcompare files

where:

 opt is optional suffix
 files is 2 file names or prefixes, given
 either as character string cut on blanks
 or as 2-element boxed list

Example

fcompare '~mywork/myutil.ijs ~/jbak/mywork/myutil.ijs'
'/myutil.ijs' fcompare jpath '~mywork';'/jbak/mywork'

fcompares (verb)

as fcompare but ignoring different line separators