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Sources/ucode/tests/custom/03_stdlib/50_uniq

  1 The `uniq()` function extracts the unique set of all values within the
  2 given input array, maintaining the original order.
  3 
  4 Returns an array containing all unique items of the input array.
  5 
  6 Returns `null` if the input is not an array value.
  7 
  8 -- Testcase --
  9 {%
 10         let o1 = { an: "object" };
 11         let o2 = { an: "object" }; // same but not identical
 12 
 13         let a1 = [ 1, 2, 3 ];
 14         let a2 = [ 1, 2, 3 ]; // same but not identical
 15 
 16         printf("%.J\n", [
 17                 // strict comparison is used, 0 and "0" are not unique
 18                 uniq([ 0, 1, 2, 0, "0", 2, 3, "4", 4 ]),
 19 
 20                 // despite NaN != NaN, two NaN values are not unique
 21                 uniq([ NaN, NaN ]),
 22 
 23                 // only identical objects are filtered, not equivalent ones
 24                 uniq([ o1, o1, o2, a1, a1, a2 ]),
 25 
 26                 // invalid input yields `null`
 27                 uniq(true)
 28         ]);
 29 %}
 30 -- End --
 31 
 32 -- Expect stdout --
 33 [
 34         [
 35                 0,
 36                 1,
 37                 2,
 38                 "0",
 39                 3,
 40                 "4",
 41                 4
 42         ],
 43         [
 44                 "NaN"
 45         ],
 46         [
 47                 {
 48                         "an": "object"
 49                 },
 50                 {
 51                         "an": "object"
 52                 },
 53                 [
 54                         1,
 55                         2,
 56                         3
 57                 ],
 58                 [
 59                         1,
 60                         2,
 61                         3
 62                 ]
 63         ],
 64         null
 65 ]
 66 -- End --

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