1	#!/usr/bin/env bash
2
3	# NOTE:
4	# -declare -A is required.
5	#
6	# Simply doing:
7	# a=([aa]=b [foo]=bar ['a+1']=c)
8	# gets utterly bizarre behavior.
9	#
10	# Associtative Arrays are COMPLETELY bash-specific. mksh doesn't even come
11	# close. So I will probably not implement them, or implement something
12	# slightly different, because the semantics are just wierd.
13
14	# http://www.gnu.org/software/bash/manual/html_node/Arrays.html
15	# TODO: Need a SETUP section.
16
17	#### TODO: SETUP should be share
18	declare -A a
19	a=([aa]=b [foo]=bar ['a+1']=c)
20
21	#### create empty assoc array, put, then get
22	declare -A d # still undefined
23	d['foo']=bar
24	echo ${d['foo']}
25	## stdout: bar
26
27	#### retrieve indices with !
28	declare -A a
29	a=([aa]=b [foo]=bar ['a+1']=c)
30	argv.py "${!a[@]}"
31	# Is this invalid on associative arrays? Makes no sense.
32	## stdout: ['foo', 'aa', 'a+1']
33
34	#### $a gives nothing
35	declare -A a
36	a=([aa]=b [foo]=bar ['a+1']=c)
37	echo "${a}"
38	## stdout-json: "\n"
39
40	#### length of dict does not work
41	declare -A a
42	a=([aa]=b [foo]=bar ['a+1']=c)
43	echo "${#a}"
44	## stdout: 0
45
46	#### index by number doesn't work
47	declare -A a
48	a=([aa]=b [foo]=bar ['a+1']=c)
49	echo 0 "${a[0]}" 1 "${a[1]}" 2 "${a[2]}"
50	## stdout-json: "0 1 2 \n"
51
52	#### index by key name
53	declare -A a
54	a=([aa]=b [foo]=bar ['a+1']=c)
55	echo "${a[aa]}" "${a[foo]}" "${a['a+1']}"
56	# WTF: Why do we get bar bar c?
57	## stdout-json: "b bar c\n"
58
59	#### index by quoted string
60	declare -A a
61	a=([aa]=b [foo]=bar ['a+1']=c)
62	echo "${a['a+1']}"
63	## stdout: c
64
65	#### index by unquoted string
66	declare -A a
67	a=([aa]=b [foo]=bar ['a+1']=c)
68	echo "${a[a+1]}"
69	## stdout: c
70
71	#### index by unquoted string as arithmetic
72	# For assoc arrays, unquoted string is just raw.
73	# For regular arrays, unquoted string is an arithmetic expression!
74	# How do I parse this?
75	declare -A assoc
76	assoc=([a+1]=c)
77	array=(5 6 7)
78	a=1
79	echo "${assoc[a]}"
80	echo "${assoc[a+1]}" # This works
81	echo "${array[a+1]}"
82	## stdout-json: "\nc\n7\n"
83
84	#### WTF index by key name
85	declare -A a
86	a=([xx]=bb [cc]=dd)
87	echo "${a[xx]}" "${a[cc]}"
88	## stdout-json: "bb dd\n"
89
90	#### Array stored in associative array gets converted to string
91	array=('1 2' 3)
92	declare -A d
93	d[a]="${array[@]}"
94	argv.py "${d[a]}"
95	## stdout: ['1 2 3']
96
97	#### Can't initialize assoc array with indexed array
98	declare -A A=(1 2 3)
99	## status: 1
100	## BUG bash status: 0
101
102	#### Initializing indexed array with with assoc array drops the constants
103	declare -a a=([xx]=1 [yy]=2 [zz]=3)
104	#declare -a a=(1 2 3)
105	echo "${a[@]}"
106	#echo "${!a[@]}"
107	## N-I mksh stdout-json: ""
108	## BUG bash stdout-json: "3\n"
109
110	#### Append to associative array value
111	declare -A a
112	a['x']+='foo'
113	a['x']+='bar'
114	argv.py "${a["x"]}"
115	## STDOUT:
116	['foobar']
117	## END
118