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<?php // https://stackoverflow.com/questions/55137231 $cases = [ [[], false], [[1], false], [[1,2], false], [[1,3], true], [[1,2,3], false], [[1,2,4], true], [[2,3,5,6], true], [[2,5,6,8], false], [[3,6,10,16], false], [[5,7,8,9,10,11], true], ]; // Assuming zero indexed and sequential keys in array. function missing_only_one_incremental_value_in_sequence(array $nums) { $count = count($nums); $seq_count = 0; for($i=1; $i<$count; $i++) if($nums[$i]==$nums[$i-1]+1) $seq_count++; return $seq_count == $count-2; } foreach($cases as $case) { echo implode(',', $case[0]); echo "\n"; $result = missing_only_one_incremental_value_in_sequence($case[0]); var_dump($result); echo $result == $case[1] ? 'Pass' : 'Fail'; echo "\n\n"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 2, Position 2 = 27
Branch analysis from position: 2
2 jumps found. (Code = 78) Position 1 = 3, Position 2 = 27
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 21, Position 2 = 23
Branch analysis from position: 21
1 jumps found. (Code = 42) Position 1 = 24
Branch analysis from position: 24
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 23
1 jumps found. (Code = 42) Position 1 = 2
Branch analysis from position: 2
Branch analysis from position: 27
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 27
filename:       /in/PFQ5d
function name:  (null)
number of ops:  29
compiled vars:  !0 = $cases, !1 = $case, !2 = $result
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   ASSIGN                                                   !0, <array>
   30     1      > FE_RESET_R                                       $4      !0, ->27
          2    > > FE_FETCH_R                                               $4, !1, ->27
   31     3    >   INIT_FCALL                                               'implode'
          4        SEND_VAL                                                 '%2C'
          5        FETCH_DIM_R                                      ~5      !1, 0
          6        SEND_VAL                                                 ~5
          7        DO_ICALL                                         $6      
          8        ECHO                                                     $6
   32     9        ECHO                                                     '%0A'
   33    10        INIT_FCALL                                               'missing_only_one_incremental_value_in_sequence'
         11        FETCH_DIM_R                                      ~7      !1, 0
         12        SEND_VAL                                                 ~7
         13        DO_FCALL                                      0  $8      
         14        ASSIGN                                                   !2, $8
   34    15        INIT_FCALL                                               'var_dump'
         16        SEND_VAR                                                 !2
         17        DO_ICALL                                                 
   35    18        FETCH_DIM_R                                      ~11     !1, 1
         19        IS_EQUAL                                                 !2, ~11
         20      > JMPZ                                                     ~12, ->23
         21    >   QM_ASSIGN                                        ~13     'Pass'
         22      > JMP                                                      ->24
         23    >   QM_ASSIGN                                        ~13     'Fail'
         24    >   ECHO                                                     ~13
   36    25        ECHO                                                     '%0A%0A'
   30    26      > JMP                                                      ->2
         27    >   FE_FREE                                                  $4
   37    28      > RETURN                                                   1

Function missing_only_one_incremental_value_in_sequence:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
2 jumps found. (Code = 44) Position 1 = 16, Position 2 = 6
Branch analysis from position: 16
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
2 jumps found. (Code = 43) Position 1 = 12, Position 2 = 13
Branch analysis from position: 12
2 jumps found. (Code = 44) Position 1 = 16, Position 2 = 6
Branch analysis from position: 16
Branch analysis from position: 6
Branch analysis from position: 13
filename:       /in/PFQ5d
function name:  missing_only_one_incremental_value_in_sequence
number of ops:  20
compiled vars:  !0 = $nums, !1 = $count, !2 = $seq_count, !3 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   19     0  E >   RECV                                             !0      
   21     1        COUNT                                            ~4      !0
          2        ASSIGN                                                   !1, ~4
   22     3        ASSIGN                                                   !2, 0
   23     4        ASSIGN                                                   !3, 1
          5      > JMP                                                      ->14
   24     6    >   FETCH_DIM_R                                      ~8      !0, !3
          7        SUB                                              ~9      !3, 1
          8        FETCH_DIM_R                                      ~10     !0, ~9
          9        ADD                                              ~11     ~10, 1
         10        IS_EQUAL                                                 ~8, ~11
         11      > JMPZ                                                     ~12, ->13
   25    12    >   PRE_INC                                                  !2
   23    13    >   PRE_INC                                                  !3
         14    >   IS_SMALLER                                               !3, !1
         15      > JMPNZ                                                    ~15, ->6
   27    16    >   SUB                                              ~16     !1, 2
         17        IS_EQUAL                                         ~17     !2, ~16
         18      > RETURN                                                   ~17
   28    19*     > RETURN                                                   null

End of function missing_only_one_incremental_value_in_sequence

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
154.46 ms | 1019 KiB | 16 Q