| 18!:0 y | Name Class. Give the name class of the locale named y, 
with 0 for named, 1 for numbered, _1 
for non-existent, and _2 for illegal name.  Thus: 
 
 
   18!:0 ;:'base j z 45bad asdf 0'
0 0 0 _2 _1 1
 | 
| [x] 18!:1 y | Name List. Give the names of named (0) or numbered (1) locales.  
The optional left argument specifies the initial letters of names. Thus: 
 
 
   18!:1 [0         All named locales
+----+-+----+--------+-------+-+
|base|j|jcfg|jnewuser|newuser|z|
+----+-+----+--------+-------+-+
   asdf_bb_=: 'sesquipedalian'
   'jb' 18!:1 [0    All named locales beginning in j or b
+----+--+-+----+--------+
|base|bb|j|jcfg|jnewuser|
+----+--+-+----+--------+
   18!:3 ''         Create a numbered locale
+-+
|0|
+-+
   18!:1 i.2        All named and numbered locales
+-+----+-+----+--------+-------+-+
|0|base|j|jcfg|jnewuser|newuser|z|
+-+----+-+----+--------+-------+-+
 | 
| [x] 18!:2 y | Path.  The monad gives the (search) path 
for locale y ; the dyad sets the path for 
locale y to x . 
The path of a locale is initially ,<,'z' , 
except that the path of locale z is empty initially.  
If a name sought in locale f is not found in f , 
then it is sought in the locales in the path of f 
(but not searching their paths).  For example: 
 
   (;:'a cd b') 18!:2 <'f'
   18!:2 <'f'
+-+--+-+
|a|cd|b|
+-+--+-+
The path of locale f is set to a , cd , 
and b . | 
|  | 
| [x] 18!:3 y | Create. If y is the empty string, then create a 
previously-unused numbered locale. 
If y is a name, then (re-)create the named locale; 
an error is signalled if the named locale already exists and is non-empty.  
The result is the name of the created locale. 
 x specifies the size of the hash table
for the locale, requiring w*2^6+x bytes where w is the
number of bytes in a word. If x is elided, then
the defaults specified 
in 9!:38 and 9!:39 are used.
A larger hash table size improves performance;  
regardless of the hash table size, a locale may contain an 
effectively unlimited number of names.
 
 
   18!:3 ''        Create a numbered locale
+-+
|0|
+-+
   18!:3 ''        Create another one
+-+
|1|
+-+
   18!:1 [1        Names of numbered locales
+-+-+
|0|1|
+-+-+
 | 
| 18!:4 y | Switch Current.  Switch the current locale to y at the
end of the currently executing named verb. 
Initially the current locale is base . | 
|  | 
| 18!:5 y | Current. The name of the current locale.  For example: 
 
   18!:5 ''
+----+
|base|
+----+
 | 
| 18!:55 y | Erase. Erase locale y (once it finishes execution).  
A numbered locale, once erased, may not be reused; 
a named locale may be reused at will. |