keys, _keys. List of hash keys

^hash._keys[]
^hash._keys[column name] [3.2.2]
^hash.keys[]
   [3.4.4]
^hash.keys[column name]   [3.4.4]

The method returns table (object of class table), containing single column with all hash keys listed (since version 3.4.0 the keys in the table are listed in order of putting the elements into the hash, before-the order is not defined).
The name of column-"
key" or the column name passed as a parameter.

Example
$man[
   $.name[
Jack]
   $.age[
22]
   $.sex[
m]
]
$tab_keys[^man.keys[]]
^tab_keys.
save[keys.txt]

…will create file
keys.txt with such a table:
key
sex
age
name



Copyright © 1997–2017 Art. Lebedev Studio | http://www.artlebedev.com Last updated: 06.01.2016