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Zsh array -a vs. -A question

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# 1  
Old 01-26-2017
Zsh array -a vs. -A question
Inside a zsh function, I create a local array with
Code:
local -a arrayname

and a local associative array with
Code:
local -A arrayname

.

I also can create an array using set, like this:

Code:
set -A arrayname value1 value2 value3

In this form, I can not explicitly declare that an array is associative or non-associative (
Code:
set -a

exists, but has a completely different meaning).

Does someone know why this distinction was made?
# 2  
Old 01-26-2017
local is the same as typeset and it is a declaration. Set is an assignment to the array. To use associative arrays, typeset (declaration) must be done beforehand.. With regular arrays declaration is optional.
Code:
% set -A arr red 1 blue 2
% echo ${arr[red]}

% typeset -A arr
% set -A arr red 1 blue 2
% echo ${arr[red]}       
1
% echo ${arr[blue]}
2

These 2 Users Gave Thanks to Scrutinizer For This Post:
jim mcnamara rovf
# 3  
Old 01-26-2017
Comparison with bash4
Code:
$ typeset -A arr
$ arr=( [red]=1 [blue]=2 )
$ echo ${arr[red]}
1
$ echo ${arr[blue]}   
2

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