| 1 | #### or short circuits
|
| 2 | shopt -s ysh:upgrade
|
| 3 |
|
| 4 | var x = [1, 2]
|
| 5 | if (true or x[3]) {
|
| 6 | echo OK
|
| 7 | }
|
| 8 | ## STDOUT:
|
| 9 | OK
|
| 10 | ## END
|
| 11 |
|
| 12 | #### and short circuits
|
| 13 | shopt -s ysh:upgrade
|
| 14 |
|
| 15 | var x = [1, 2]
|
| 16 | if (false and x[3]) {
|
| 17 | echo bad
|
| 18 | } else {
|
| 19 | echo OK
|
| 20 | }
|
| 21 |
|
| 22 | ## STDOUT:
|
| 23 | OK
|
| 24 | ## END
|
| 25 |
|
| 26 | #### not operator behaves like Python
|
| 27 |
|
| 28 | # consistent with if statement, ternary if, and, or
|
| 29 |
|
| 30 | pp test_ (not "s")
|
| 31 | pp test_ (not 3)
|
| 32 | pp test_ (not 4.5)
|
| 33 | pp test_ (not {})
|
| 34 | pp test_ (not [])
|
| 35 | pp test_ (not false)
|
| 36 | pp test_ (not true)
|
| 37 |
|
| 38 | ## STDOUT:
|
| 39 | (Bool) false
|
| 40 | (Bool) false
|
| 41 | (Bool) false
|
| 42 | (Bool) true
|
| 43 | (Bool) true
|
| 44 | (Bool) true
|
| 45 | (Bool) false
|
| 46 | ## END
|
| 47 |
|
| 48 | #### not, and, or
|
| 49 |
|
| 50 | var a = not true
|
| 51 | echo $a
|
| 52 | var b = true and false
|
| 53 | echo $b
|
| 54 | var c = true or false
|
| 55 | echo $c
|
| 56 |
|
| 57 | ## STDOUT:
|
| 58 | false
|
| 59 | false
|
| 60 | true
|
| 61 | ## END
|
| 62 |
|
| 63 |
|
| 64 | #### and-or chains for typed data
|
| 65 | shopt --set parse_ysh_expr_sub
|
| 66 |
|
| 67 | python2 -c 'print(None or "s")'
|
| 68 | python2 -c 'print(None and "s")'
|
| 69 |
|
| 70 | python2 -c 'print("x" or "y")'
|
| 71 | python2 -c 'print("x" and "y")'
|
| 72 |
|
| 73 | python2 -c 'print("" or "y")'
|
| 74 | python2 -c 'print("" and "y")'
|
| 75 |
|
| 76 | python2 -c 'print(42 or 0)'
|
| 77 | python2 -c 'print(42 and 0)'
|
| 78 |
|
| 79 | python2 -c 'print(0 or 42)'
|
| 80 | python2 -c 'print(0 and 42)'
|
| 81 |
|
| 82 | python2 -c 'print(0.0 or 0.5)'
|
| 83 | python2 -c 'print(0.0 and 0.5)'
|
| 84 |
|
| 85 | python2 -c 'print(["a"] or [])'
|
| 86 | python2 -c 'print(["a"] and [])'
|
| 87 |
|
| 88 | python2 -c 'print({"d": 1} or {})'
|
| 89 | python2 -c 'print({"d": 1} and {})'
|
| 90 |
|
| 91 | python2 -c 'print(0 or 0.0 or False or [] or {} or "OR")'
|
| 92 | python2 -c 'print(1 and 1.0 and True and [5] and {"d":1} and "AND")'
|
| 93 |
|
| 94 | echo ---
|
| 95 |
|
| 96 | json write (null or "s")
|
| 97 | json write (null and "s")
|
| 98 |
|
| 99 | echo $["x" or "y"]
|
| 100 | echo $["x" and "y"]
|
| 101 |
|
| 102 | echo $["" or "y"]
|
| 103 | echo $["" and "y"]
|
| 104 |
|
| 105 | echo $[42 or 0]
|
| 106 | echo $[42 and 0]
|
| 107 |
|
| 108 | echo $[0 or 42]
|
| 109 | echo $[0 and 42]
|
| 110 |
|
| 111 | echo $[0.0 or 0.5]
|
| 112 | echo $[0.0 and 0.5]
|
| 113 |
|
| 114 | pp test_ (["a"] or [])
|
| 115 | pp test_ (["a"] and [])
|
| 116 |
|
| 117 | pp test_ ({"d": 1} or {})
|
| 118 | pp test_ ({"d": 1} and {})
|
| 119 |
|
| 120 | echo $[0 or 0.0 or false or [] or {} or "OR"]
|
| 121 | echo $[1 and 1.0 and true and [5] and {"d":1} and "AND"]
|
| 122 |
|
| 123 | ## STDOUT:
|
| 124 | s
|
| 125 | None
|
| 126 | x
|
| 127 | y
|
| 128 | y
|
| 129 |
|
| 130 | 42
|
| 131 | 0
|
| 132 | 42
|
| 133 | 0
|
| 134 | 0.5
|
| 135 | 0.0
|
| 136 | ['a']
|
| 137 | []
|
| 138 | {'d': 1}
|
| 139 | {}
|
| 140 | OR
|
| 141 | AND
|
| 142 | ---
|
| 143 | "s"
|
| 144 | null
|
| 145 | x
|
| 146 | y
|
| 147 | y
|
| 148 |
|
| 149 | 42
|
| 150 | 0
|
| 151 | 42
|
| 152 | 0
|
| 153 | 0.5
|
| 154 | 0.0
|
| 155 | (List) ["a"]
|
| 156 | (List) []
|
| 157 | (Dict) {"d":1}
|
| 158 | (Dict) {}
|
| 159 | OR
|
| 160 | AND
|
| 161 | ## END
|
| 162 |
|
| 163 | #### or BashArray, or BashAssoc
|
| 164 | declare -a array=(1 2 3)
|
| 165 | pp test_ (array or 'yy')
|
| 166 |
|
| 167 | declare -A assoc=([k]=v)
|
| 168 | pp test_ (assoc or 'zz')
|
| 169 |
|
| 170 | ## STDOUT:
|
| 171 | {"type":"BashArray","data":{"0":"1","1":"2","2":"3"}}
|
| 172 | {"type":"BashAssoc","data":{"k":"v"}}
|
| 173 | ## END
|
| 174 |
|
| 175 | #### x if b else y
|
| 176 | var b = true
|
| 177 | var i = 42
|
| 178 | var t = i+1 if b else i-1
|
| 179 | echo $t
|
| 180 | var f = i+1 if false else i-1
|
| 181 | echo $f
|
| 182 | ## STDOUT:
|
| 183 | 43
|
| 184 | 41
|
| 185 | ## END
|
| 186 |
|