1 ## oils_failures_allowed: 1
2
3 # Test a[1]
4
5 #### precedence of 1:3 vs comparison
6
7 # This test exposed nondeterminism in CPython itself! Gah. Is this because of
8 # the hashing?
9 # Python xrange objects probably shouldn't even be comparable!
10 #
11 # = 1..3 < 1..4
12 # >>> xrange(1,3) < xrange(1,4)
13 # False
14 # >>> xrange(1,3) < xrange(1,4)
15 # True
16
17 = 1..3
18
19 ## STDOUT:
20 (Range 1 .. 3)
21 ## END
22
23 #### precedence of 1:3 vs bitwise operator
24 = 3..3|4
25 ## STDOUT:
26 (Range 3 .. 7)
27 ## END
28
29 #### subscript and slice :| 1 2 3 4 |
30 var myarray = :|1 2 3 4|
31 pp line (myarray[1])
32 pp line (myarray[1:3])
33
34 echo 'implicit'
35 pp line (myarray[:2])
36 pp line (myarray[2:])
37
38 echo 'out of bounds'
39 pp line (myarray[:5])
40 pp line (myarray[-5:])
41
42 # Stride not supported
43 #= myarray[1:4:2]
44
45 # Now try omitting some
46 #= myarray[1:4:2]
47 ## STDOUT:
48 (Str) "2"
49 (List) ["2","3"]
50 implicit
51 (List) ["1","2"]
52 (List) ["3","4"]
53 out of bounds
54 (List) ["1","2","3","4"]
55 (List) ["1","2","3","4"]
56 ## END
57
58 #### slice subscripts are adjusted like Python
59
60 show-py() {
61 python3 -c '
62 import json, sys; a = [1, 2, 3, 4, 5]; print(json.dumps(eval(sys.argv[1])))' $1
63 }
64
65 show-ysh() {
66 eval "var a = [1, 2, 3, 4, 5]; json write ($1, space=0)"
67 }
68
69 compare() {
70 local expr=$1
71 show-py "$1" | sed 's/ //g'
72 show-ysh "$1"
73 echo
74 }
75
76 compare 'a[1:3]'
77 compare 'a[1:100]' # big number
78 compare 'a[100:1]' # inverted
79 compare 'a[1:-1]'
80 compare 'a[-3:-1]'
81 compare 'a[-100:-1]' # very negative
82 compare 'a[-1:-100]' # inverted
83 compare 'a[4:5]'
84
85 ## STDOUT:
86 [2,3]
87 [2,3]
88
89 [2,3,4,5]
90 [2,3,4,5]
91
92 []
93 []
94
95 [2,3,4]
96 [2,3,4]
97
98 [3,4]
99 [3,4]
100
101 [1,2,3,4]
102 [1,2,3,4]
103
104 []
105 []
106
107 [5]
108 [5]
109
110 ## END
111
112
113 #### subscript and slice of List
114 var mylist = [1,2,3,4]
115 pp line (mylist[1])
116 pp line (mylist[1:3])
117
118 echo 'implicit'
119 pp line (mylist[:2])
120 pp line (mylist[2:])
121 ## STDOUT:
122 (Int) 2
123 (List) [2,3]
124 implicit
125 (List) [1,2]
126 (List) [3,4]
127 ## END
128
129 #### expressions and negative indices
130 var myarray = :|1 2 3 4 5|
131 pp line (myarray[-1])
132 pp line (myarray[-4:-2])
133
134 echo 'implicit'
135 pp line (myarray[:-2])
136 pp line (myarray[-2:])
137 ## STDOUT:
138 (Str) "5"
139 (List) ["2","3"]
140 implicit
141 (List) ["1","2","3"]
142 (List) ["4","5"]
143 ## END
144
145 #### Index with expression
146 var mydict = {['5']: 3}
147 var val = mydict["$[2+3]"]
148 echo $val
149 ## STDOUT:
150 3
151 ## END
152
153 #### Copy with a[:]
154 var a = [1,2,3]
155 var b = a[:]
156 pp line (b)
157 ## STDOUT:
158 (List) [1,2,3]
159 ## END
160
161 #### Iterate over range
162 for i in (1..5) {
163 echo $[i]
164 }
165 for i, n in (1..4) {
166 echo "$[i], $[n]"
167 }
168 ## STDOUT:
169 1
170 2
171 3
172 4
173 0, 1
174 1, 2
175 2, 3
176 ## END
177
178 #### Loops over bogus ranges terminate
179 # Regression test for bug found during dev. Loops over backwards ranges should
180 # terminate immediately.
181 for i in (5..1) {
182 echo $[i]
183 }
184 ## STDOUT:
185 ## END
186
187 #### Slices with Multiple Dimensions (for TSV8?)
188
189 qtt pretty :mytable <<< '''
190 name age:Int
191 alice 42
192 bob 31
193 carol 20
194 '''
195
196 # Cut off the first two rows
197 var t1 = mytable[2:, :]
198 = t1
199
200 var t2 = mytable[:2, 3:4]
201 = t2
202
203 var t3 = mytable[:2, %(name age)]
204 = t3
205
206 ## STDOUT:
207 (Str) 'TODO: Table Slicing'
208 (Str) 'TODO: Table Slicing'
209 ## END