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Space 7!:

See also 9!:20 and 9!:21 .

7!:0 y Current. Space currently in use.
 
7!:2 y Execute. Space required to execute sentence y. For example:
   7!:2 ',/x' [ x=: 3000 2 5$'kerygmatic'
33888
7!:3 y Free Space. Information on the state of the J memory manager, currently a 2-column table of the block sizes and number of free blocks for each size. For example:
   7!:3 ''
   32  950
   64 1135
  128  554
  256  157
  512   74
 1024   40
The definition and availability of 7!:3 are subject to change.

7!:5 y Space. The space in bytes used by the named objects y (noun, verb, adverb, or conjunction). For example:
   Hilbert=: % @: >: @: (+/~) @: i.

   7!:5 <'Hilbert'
896
   7!:5 <'name_without_value'
|value error: name_without_value
|       7!:5<'name_without_value'

   sp=: 3 : '7!:5 <''y'''
   sp 'chiaroscuro'
64
   sp i.1000
4096
   sp o.i.1000
8192

   x=: o.y=: i.1000
   7!:5 ;:'x y Hilbert'
8192 4096 896
7!:6 y Locale Space. The space in bytes used by the locales named in y , including the space for the names as well as values in the locale, locale name, path, hash table, and global symbol table entries. For example:
   7!:6 ;:'base z 0'
8256 198880 2168
   7!:6 <'12345'
|locale error
|       7!:6<'12345'
   7!:6 <'nonexistent'
|locale error
|       7!:6<'nonexistent'


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