Guides/Regular Expressions/J Patterns
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J Patterns
The following nouns defined in the jregex locale are patterns which match elements of J code:
name | matches |
---|---|
Jname | name |
Jnumitem | numeric item or array |
Jnum | numeric item or array |
Jchar | character string |
Jconst | numeric or character constant, including a. and a: |
Jassign | any assignment |
Jgassign | global assignment |
Jlassign | local assignment |
Jlpar | left parentheses |
Jrpar | right parentheses |
Jsol | start of a J sentence (ignores leading blanks) |
Jeol | end of a J sentence (ignores trailing blanks/comments) |
Examples
show=: showmatches_jregex_ Jname show '10 myverb_myloc_ i.10' 10 myverb_myloc_ i.10 ^^^^^^^^^^^^^ ^ Jnumitem show '10 myverb 123e10, dat' 10 myverb 123e10, dat ^^ ^^^^^^ Jnum show 'myverb 2 3 5 7' myverb 2 3 5 7 ^^^^^^^^ Jcharitem show '10 myverb ''t''' 10 myverb 't' ^^^ Jchar show '10 myverb ''testing''' 10 myverb 'testing' ^^^^^^^^^ Jconst show '10 abc 2p1 def 1e5' 10 abc 2p1 def 1e5 ^^^ ^^^^^ ^^^^ Jassign show 'myverb abc=. def=: 123' myverb abc=. def=: 123 ^^ ^^ Jlassign show 'myverb abc=. def=: 123' myverb abc=. def=: 123 ^^ Jgassign show 'myverb abc=. def=: 123' myverb abc=. def=: 123 ^^ Jlpar show 'myverb (,3);(i.5);''test''' myverb (,3);(i.5);'test' ^ ^ Jrpar show 'myverb (,3);(i.5);''test''' myverb (,3);(i.5);'test' ^ ^ Jsol show ' myverb 100 NB. test' myverb 100 NB. test ^^^^ Jeol show ' myverb 100 NB. test' myverb 100 NB. test ^^^^^^^^^^