Generate and return the number of occurrences of the input pattern in the input array optionally subject to user-specified memory blindness. More...

Detailed Description

Generate and return the number of occurrences of the input pattern in the input array optionally subject to user-specified memory blindness.

The instances of pattern are found via linear search.
Therefore, the procedures under this generic interface have a worst-case complexity of O(size(array)).

Parameters

[in]	array	: The input `contiguous` array of rank `1` of either type `character` of kind any supported by the processor (e.g., SK, SKA, SKD , or SKU), or type `integer` of kind any supported by the processor (e.g., IK, IK8, IK16, IK32, or IK64), or type `logical` of kind any supported by the processor (e.g., LK), or type `complex` of kind any supported by the processor (e.g., CK, CK32, CK64, or CK128), or type `real` of kind any supported by the processor (e.g., RK, RK32, RK64, or RK128), or a scalar assumed-length `character` of kind any supported by the processor (e.g., SK, SKA, SKD , or SKU), within which the starting indices of the requested instances of `pattern` is to be found.
[in]	pattern	: The input object of the same or lower rank than the input `array`, and of the same type and kind as `array` containing the pattern that must be found within the input `array`.
[in]	border	: The input scalar constant object that can be any of the following, the constant discrete or an object of type discrete_type, implying that only non-overlapping and non-adjacent pattern locations must be identified. For example, if `pattern` is a blank character, and multiple adjacent blanks appear in `array`, the only the location of the first blank is identified and the rest are ignored until a blank reappears separately from the first group of contiguous blanks. Note that border adjacency and overlapping is measured by the input `blindness` and not by the length of `pattern`. This option is extremely useful for identifying and parsing separators that can be repeated in text file records, for example, the white-space (blank) character in list-directed Fortran IO. (optional. The default behavior does not recognize any borders for `pattern`.)
	iseq	: The `external` user-specified function that takes two input explicit-shape arguments of the same type and kind as the input `array` and possibly, also the length of the arguments as the third argument, if the arguments are array-valued. It returns a scalar `logical` of default kind LK that is `.true.` if all elements of the two input arguments are equivalent (e.g., equal) according to the user-defined criterion, otherwise, it is `.false.`. If `pattern` is an array of rank `1`, then the last argument to `iseq` is the length of the input `pattern`, preceded by a segment of `array` and `pattern` as the first and second arguments, whose lengths are given by the third argument `lenPattern`. The following illustrates the generic interface of `iseq` where `pattern` is array-valued, function iseq(Segment, pattern, lenPattern) result(equivalent) use pm_kind, only: IK, LK integer(IK) , intent(in) :: lenPattern TYPE(KIND) , intent(in) :: Segment(lenPattern), pattern(lenPattern) logical(LK) :: equivalent end function pm_kind This module defines the relevant Fortran kind type-parameters frequently used in the ParaMonte librar... Definition: pm_kind.F90:268 pm_kind::LK integer, parameter LK The default logical kind in the ParaMonte library: kind(.true.) in Fortran, kind(.... Definition: pm_kind.F90:541 pm_kind::IK integer, parameter IK The default integer kind in the ParaMonte library: int32 in Fortran, c_int32_t in C-Fortran Interoper... Definition: pm_kind.F90:540 where `TYPE(KIND)` represents the type and kind of the input argument `array`, which can be one of the following, character(, SK), intent(in) :: Segment(lenPattern), pattern(lenPattern) integer(IK) , intent(in) :: Segment(lenPattern), pattern(lenPattern) logical(LK) , intent(in) :: Segment(lenPattern), pattern(lenPattern) complex(CK) , intent(in) :: Segment(lenPattern), pattern(lenPattern) real(RK) , intent(in) :: Segment(lenPattern), pattern(lenPattern) where the kinds `SK`, `IK`, `LK`, `CK`, `RK`, can refer to any kind type parameter that is supported by the processor. The following illustrates the generic interface of `iseq` where `pattern` is scalar-valued (including Fortran scalar strings), function iseq(segment, pattern) result(equivalent) use pm_kind, only: LK TYPE(KIND) , intent(in) :: segment, pattern logical(LK) :: equivalent end function where `TYPE(KIND)` represents the type and kind of the input argument `array`, which can be one of the following, use pm_kind, only: SK, IK, LK, CK, RK character(, SK), intent(in) :: segment, pattern integer(IK) , intent(in) :: segment, pattern logical(LK) , intent(in) :: segment, pattern complex(CK) , intent(in) :: segment, pattern real(RK) , intent(in) :: segment, pattern pm_kind::RK integer, parameter RK The default real kind in the ParaMonte library: real64 in Fortran, c_double in C-Fortran Interoperati... Definition: pm_kind.F90:543 pm_kind::CK integer, parameter CK The default complex kind in the ParaMonte library: real64 in Fortran, c_double_complex in C-Fortran I... Definition: pm_kind.F90:542 pm_kind::SK integer, parameter SK The default character kind in the ParaMonte library: kind("a") in Fortran, c_char in C-Fortran Intero... Definition: pm_kind.F90:539 where the kinds `SK`, `IK`, `LK`, `CK`, `RK`, can refer to any kind type parameter that is supported by the processor. This user-defined equivalence check is extremely useful where a user-defined equivalence test other than exact equality or identity is needed, for example, when the array segments should match the input `pattern` only within a given threshold or, when the case-sensitivity in character comparisons do not matter. In such cases, user can define a custom equivalence criterion within the user-defined external function `iseq` to achieve the goal. (optional, the default equivalence operator is `.eqv.` if the input `array` is `logical`, otherwise `==`.)
[in]	blindness	: The input positive `integer` of default kind IK representing the length of the segment of `array` that should be ignored after finding an instance of the input `pattern` in the array. Setting `blindness = len(pattern)` (for assumed-length character `pattern`) or `blindness = size(pattern)` (for other types of array-valued `pattern`) will lead to a search for exclusive non-overlapping instances of `pattern` in the input `array`. See the examples below for more illustration of the utility of this input argument. (optional, default = `1_IK`)

Returns: count : The output non-negative scalar of type integer of default kind IK containing the number of times the input pattern appears in the input array.

Possible calling interfaces ⛓

: use pm_arrayFind, only: getCountLoc

! `array` and `pattern` are scalar strings.

count = getCountLoc(array, pattern, blindness = blindness)

count = getCountLoc(array, pattern, iseq, blindness = blindness)

! `pattern` is a scalar of the same type and kind as `array`.

count = getCountLoc(array(:), pattern, blindness = blindness)

count = getCountLoc(array(:), pattern, iseq, blindness = blindness)

! `array` and `pattern` are both vectors.

count = getCountLoc(array(:), pattern(:), blindness = blindness)

count = getCountLoc(array(:), pattern(:), iseq, blindness = blindness)

! `array` and `pattern` are scalar strings.

count = getCountLoc(array, pattern, border, blindness = blindness)

count = getCountLoc(array, pattern, border, iseq, blindness = blindness)

! `pattern` is a scalar of the same type and kind as `array`.

count = getCountLoc(array(:), pattern, border, blindness = blindness)

count = getCountLoc(array(:), pattern, border, iseq, blindness = blindness)

! `array` and `pattern` are both vectors.

count = getCountLoc(array(:), pattern(:), border, blindness = blindness)

count = getCountLoc(array(:), pattern(:), border, iseq, blindness = blindness)

!

pm_arrayFind::getCountLoc
Generate and return the number of occurrences of the input pattern in the input array optionally subj...
Definition: pm_arrayFind.F90:366

pm_arrayFind
This module contains procedures and generic interfaces for finding locations of a pattern in arrays o...
Definition: pm_arrayFind.F90:96

Warning: The condition 0 < blindness must hold for the corresponding input arguments.
This condition is verified only if the library is built with the preprocessor macro CHECK_ENABLED=1.; The procedures under this generic interface are impure when the user-specified external procedure iseq is specified as input argument.; Note that in Fortran, trailing blanks are ignored in character comparison, that is, "Fortran" == "Fortran " yields .true..; The pure procedure(s) documented herein become impure when the ParaMonte library is compiled with preprocessor macro CHECK_ENABLED=1.
By default, these procedures are pure in release build and impure in debug and testing builds.

See also: setLoc
getBin
setReplaced
getReplaced
setInserted
setSplit

Example usage ⛓

: 1program example

2

3 use pm_kind, only: SK, IK, LK

4 use pm_kind, only: IKG => IK ! All kinds are supported.

5 use pm_kind, only: CKG => CK ! All kinds are supported.

6 use pm_kind, only: RKG => RK ! All kinds are supported.

7 use pm_io, only: display_type

8 use pm_arrayFind, only: getCountLoc, discrete

9

10 implicit none

11

12 type(display_type) :: disp

13 disp = display_type(file = "main.out.F90")

14

15 !array = [1., 0., 2., 0., 3., 0., 4.]

16 !array = [(1., -1.), (0., -0.), (2., -2.), (0., -0.), (3., -3.), (0., -0.), (4., -4.)]

17 !array = [.false._LK, .true._LK, .false._LK, .true._LK, .false._LK, .true._LK, .false._LK]

18

19 !pattern = ["XXX"]

20 !pattern = [0_IK]

21 !pattern = [0._RK]

22 !pattern = [(0._CK, -0._CK)]

23 !pattern = [.true._LK]

24

25 call disp%skip()

26 call disp%show("!%%%%%%%%%%%%%%%%%%%%%%%")

27 call disp%show("!count character scalar.")

28 call disp%show("!%%%%%%%%%%%%%%%%%%%%%%%")

29 call disp%skip()

30

31 block

32 use pm_kind, only: SKG => SK ! All kinds are supported.

33 character(:,SKG), allocatable :: array, pattern

34 call disp%show("array = 'Paramonte is a Machine Learning Library '")

35 array = 'Paramonte is a Machine Learning Library '

36 call disp%show("pattern = ' '")

37 pattern = ' '

38 call disp%show("getCountLoc(array, pattern)")

39 call disp%show( getCountLoc(array, pattern) )

40 call disp%show("getCountLoc(array, pattern, blindness = 3_IK)")

41 call disp%show( getCountLoc(array, pattern, blindness = 3_IK) )

42 call disp%show("getCountLoc(array, pattern, border = discrete)")

43 call disp%show( getCountLoc(array, pattern, border = discrete) )

44 call disp%show("getCountLoc(array, pattern, border = discrete, blindness = 3_IK)")

45 call disp%show( getCountLoc(array, pattern, border = discrete, blindness = 3_IK) )

46 call disp%show("getCountLoc(array, SKG_'m', iseq_SK) ! find with custom case-insensitive search.")

47 call disp%show( getCountLoc(array, SKG_'m', iseq_SK) )

48 call disp%show("getCountLoc(array, SKG_'m')")

49 call disp%show( getCountLoc(array, SKG_'m') )

50 end block

51

52 call disp%skip()

53 call disp%show("!%%%%%%%%%%%%%%%%%%%%%%")

54 call disp%show("!count character array.")

55 call disp%show("!%%%%%%%%%%%%%%%%%%%%%%")

56 call disp%skip()

57

58 block

59 use pm_kind, only: SKG => SK ! All kinds are supported.

60 character(9,SKG), allocatable :: array(:), pattern

61 call disp%show("array = [character(9,SKG) :: 'xxx', 'Paramonte', 'XXX', 'is', 'XXX', 'a', 'XXX', 'Monte', 'XXX', 'Carlo', 'XXX', 'XXX', 'XXX', 'Library.', 'XXX']")

62 array = [character(9,SKG) :: 'xxx', 'Paramonte', 'XXX', 'is', 'XXX', 'a', 'XXX', 'Monte', 'XXX', 'Carlo', 'XXX', 'XXX', 'XXX', 'Library.', 'XXX']

63 call disp%show("pattern = 'XXX'")

64 pattern = 'XXX'

65 call disp%show("getCountLoc(array, pattern)")

66 call disp%show( getCountLoc(array, pattern) )

67 call disp%show("getCountLoc(array, pattern, blindness = 3_IK)")

68 call disp%show( getCountLoc(array, pattern, blindness = 3_IK) )

69 call disp%show("getCountLoc(array, pattern, border = discrete)")

70 call disp%show( getCountLoc(array, pattern, border = discrete) )

71 call disp%show("getCountLoc(array, pattern, border = discrete, blindness = 3_IK)")

72 call disp%show( getCountLoc(array, pattern, border = discrete, blindness = 3_IK) )

73 call disp%show("getCountLoc(array, SKG_'xxx', iseq_SK) ! find with custom case-insensitive search.")

74 call disp%show( getCountLoc(array, SKG_'xxx', iseq_SK) )

75 call disp%show("getCountLoc(array, SKG_'xxx')")

76 call disp%show( getCountLoc(array, SKG_'xxx') )

77 call disp%show("getCountLoc(array, [character(3,SKG) :: 'XXX', 'XXX']) ! vector pattern")

78 call disp%show( getCountLoc(array, [character(3,SKG) :: 'XXX', 'XXX']) )

79 end block

80

81 call disp%skip()

82 call disp%show("!%%%%%%%%%%%%%%%%%%%%")

83 call disp%show("!count integer array.")

84 call disp%show("!%%%%%%%%%%%%%%%%%%%%")

85 call disp%skip()

86

87 block

88 use pm_kind, only: IKG => IK ! All kinds are supported.

89 integer(IKG), allocatable :: array(:), pattern

90 call disp%show("array = [-1, 1, -2, 0, 0, 0, 2, 0, 3, 0, 4]")

91 array = [-1, 1, -2, 0, 0, 0, 2, 0, 3, 0, 4]

92 call disp%show("pattern = 0")

93 pattern = 0

94 call disp%show("getCountLoc(array, pattern)")

95 call disp%show( getCountLoc(array, pattern) )

96 call disp%show("getCountLoc(array, pattern, blindness = 3_IK)")

97 call disp%show( getCountLoc(array, pattern, blindness = 3_IK) )

98 call disp%show("getCountLoc(array, pattern, border = discrete)")

99 call disp%show( getCountLoc(array, pattern, border = discrete) )

100 call disp%show("getCountLoc(array, pattern, border = discrete, blindness = 3_IK)")

101 call disp%show( getCountLoc(array, pattern, border = discrete, blindness = 3_IK) )

102 call disp%show("pattern = 2")

103 pattern = 2

104 call disp%show("getCountLoc(array, pattern, iseq_IK) ! find any pattern+-1 with custom search.")

105 call disp%show( getCountLoc(array, pattern, iseq_IK) )

106 call disp%show("getCountLoc(array, pattern)")

107 call disp%show( getCountLoc(array, pattern) )

108 call disp%show("pattern = 0")

109 pattern = 0

110 call disp%show("getCountLoc(array, [pattern, pattern]) ! vector pattern")

111 call disp%show( getCountLoc(array, [pattern, pattern]) )

112 end block

113

114 call disp%skip()

115 call disp%show("!%%%%%%%%%%%%%%%%%%%%")

116 call disp%show("!count logical array.")

117 call disp%show("!%%%%%%%%%%%%%%%%%%%%")

118 call disp%skip()

119

120 block

121 use pm_kind, only: LKG => LK ! All kinds are supported.

122 logical(LKG), allocatable :: array(:), pattern

123 call disp%show("array = [.false., .true., .false., .true., .false., .false., .false., .true., .false.]")

124 array = [.false., .true., .false., .true., .false., .false., .false., .true., .false.]

125 call disp%show("pattern = .false.")

126 pattern = .false.

127 call disp%show("getCountLoc(array, pattern)")

128 call disp%show( getCountLoc(array, pattern) )

129 call disp%show("getCountLoc(array, pattern, blindness = 3_IK)")

130 call disp%show( getCountLoc(array, pattern, blindness = 3_IK) )

131 call disp%show("getCountLoc(array, pattern, border = discrete)")

132 call disp%show( getCountLoc(array, pattern, border = discrete) )

133 call disp%show("getCountLoc(array, pattern, border = discrete, blindness = 3_IK)")

134 call disp%show( getCountLoc(array, pattern, border = discrete, blindness = 3_IK) )

135 call disp%show("pattern = .true.")

136 pattern = .true.

137 call disp%show(.not."getCountLoc(array, [pattern, pattern], iseqall_LK) ! find any non-equivalent logical pair with custom search: [.true., .false.] or [.false., .true.].")

138 call disp%show( getCountLoc(array, [pattern, .not. pattern], iseqall_LK) )

139 call disp%show(.not."getCountLoc(array, [pattern, pattern])")

140 call disp%show( getCountLoc(array, [pattern, .not. pattern]) )

141 end block

142

143 call disp%skip()

144 call disp%show("!%%%%%%%%%%%%%%%%%%%%")

145 call disp%show("!count complex array.")

146 call disp%show("!%%%%%%%%%%%%%%%%%%%%")

147 call disp%skip()

148

149 block

150 use pm_kind, only: CKG => RKS ! All kinds are supported.

151 complex(CKG), allocatable :: array(:), pattern

152 call disp%show("array = [(-1., +1.), (1., 1.), (-1., 0.), (0., 0.), (0., 0.), (0., 0.), (0., 1.), (0., 0.), (3., -3.), (0., 0.), (4., -4)]")

153 array = [(-1., +1.), (1., 1.), (-1., 0.), (0., 0.), (0., 0.), (0., 0.), (0., 1.), (0., 0.), (3., -3.), (0., 0.), (4., -4)]

154 call disp%show("pattern = 0")

155 pattern = 0

156 call disp%show("getCountLoc(array, pattern)")

157 call disp%show( getCountLoc(array, pattern) )

158 call disp%show("getCountLoc(array, pattern, blindness = 3_IK)")

159 call disp%show( getCountLoc(array, pattern, blindness = 3_IK) )

160 call disp%show("getCountLoc(array, pattern, border = discrete)")

161 call disp%show( getCountLoc(array, pattern, border = discrete) )

162 call disp%show("getCountLoc(array, pattern, border = discrete, blindness = 3_IK)")

163 call disp%show( getCountLoc(array, pattern, border = discrete, blindness = 3_IK) )

164 call disp%show("pattern = (0., 0.) ! dummy search value.")

165 pattern = (0., 0.)

166 call disp%show("getCountLoc(array, pattern, iseq_CK) ! find any complex value whose components have opposite signs.")

167 call disp%show( getCountLoc(array, pattern, iseq_CK) )

168 call disp%show("getCountLoc(array, pattern)")

169 call disp%show( getCountLoc(array, pattern) )

170 call disp%show("pattern = 0")

171 pattern = 0

172 call disp%show("getCountLoc(array, [pattern, pattern]) ! vector pattern")

173 call disp%show( getCountLoc(array, [pattern, pattern]) )

174 end block

175

176 call disp%skip()

177 call disp%show("!%%%%%%%%%%%%%%%%%")

178 call disp%show("!count real array.")

179 call disp%show("!%%%%%%%%%%%%%%%%%")

180 call disp%skip()

181

182 block

183 use pm_kind, only: RKG => RKS ! All kinds are supported.

184 real(RKG), allocatable :: array(:), pattern

185 call disp%show("array = [-1, 1, -2, 0, 0, 0, 2, 0, 3, 0, 4]")

186 array = [-1, 1, -2, 0, 0, 0, 2, 0, 3, 0, 4]

187 call disp%show("pattern = 0")

188 pattern = 0

189 call disp%show("getCountLoc(array, pattern)")

190 call disp%show( getCountLoc(array, pattern) )

191 call disp%show("getCountLoc(array, pattern, blindness = 3_IK)")

192 call disp%show( getCountLoc(array, pattern, blindness = 3_IK) )

193 call disp%show("getCountLoc(array, pattern, border = discrete)")

194 call disp%show( getCountLoc(array, pattern, border = discrete) )

195 call disp%show("getCountLoc(array, pattern, border = discrete, blindness = 3_IK)")

196 call disp%show( getCountLoc(array, pattern, border = discrete, blindness = 3_IK) )

197 call disp%show("pattern = 2")

198 pattern = 2

199 call disp%show("getCountLoc(array, pattern, iseq_RK) ! find any whose absolute value is within 0.5 of `pattern`.")

200 call disp%show( getCountLoc(array, pattern, iseq_RK) )

201 call disp%show("getCountLoc(array, pattern)")

202 call disp%show( getCountLoc(array, pattern) )

203 call disp%show("pattern = 0")

204 pattern = 0

205 call disp%show("getCountLoc(array, [pattern, pattern]) ! vector pattern")

206 call disp%show( getCountLoc(array, [pattern, pattern]) )

207 end block

208

209contains

210

211 pure function iseq_SK(segment, pattern) result(equivalent)

212 use pm_strASCII, only: getStrLower

213 character(*, SK), intent(in) :: segment, pattern

214 logical(LK) :: equivalent

215 equivalent = pattern == getStrLower(segment)

216 end function

217

218 function iseq_IK(segment, pattern) result(equivalent)

219 use pm_kind, only: IKG => IK

220 integer(IKG) , intent(in) :: segment, pattern

221 logical(LK) :: equivalent

222 equivalent = pattern - 2 < segment .and. segment < pattern + 2

223 end function

224

225 function iseqall_LK(segment, pattern, lenPattern) result(equivalent)

226 use pm_kind, only: LKG => LK

227 integer(IK) , intent(in) :: lenPattern

228 logical(LKG) , intent(in) :: pattern(lenPattern), segment(lenPattern)

229 logical(LK) :: equivalent

230 equivalent = segment(1) .neqv. segment(2)

231 end function

232

233 function iseq_CK(segment, pattern) result(equivalent)

234 use pm_kind, only: CKG => RKS

235 complex(CKG) , intent(in) :: segment, pattern

236 logical(LK) :: equivalent

237 equivalent = segment%re * segment%im < 0._CKG

238 end function

239

240 function iseq_RK(segment, pattern) result(equivalent)

241 use pm_kind, only: RKG => RKS

242 real(RKG) , intent(in) :: segment, pattern

243 logical(LK) :: equivalent

244 equivalent = abs(abs(segment) - pattern) <= 0.5_RKG

245 end function

246

247end program example

pm_io::show
This is a generic method of the derived type display_type with pass attribute.
Definition: pm_io.F90:11726

pm_io::skip
This is a generic method of the derived type display_type with pass attribute.
Definition: pm_io.F90:11508

pm_strASCII::getStrLower
Generate and return the input string where the uppercase English alphabets are all converted to lower...
Definition: pm_strASCII.F90:4092

pm_io
This module contains classes and procedures for input/output (IO) or generic display operations on st...
Definition: pm_io.F90:252

pm_io::disp
type(display_type) disp
This is a scalar module variable an object of type display_type for general display.
Definition: pm_io.F90:11393

pm_kind::RKS
integer, parameter RKS
The single-precision real kind in Fortran mode. On most platforms, this is an 32-bit real kind.
Definition: pm_kind.F90:567

pm_strASCII
This module contains the uncommon and hardly representable ASCII characters as well as procedures for...
Definition: pm_strASCII.F90:61

pm_io::display_type
Generate and return an object of type display_type.
Definition: pm_io.F90:10282

Example Unix compile command via Intel ifort compiler ⛓
1#!/usr/bin/env sh

2rm main.exe

3ifort -fpp -standard-semantics -O3 -Wl,-rpath,../../../lib -I../../../inc main.F90 ../../../lib/libparamonte* -o main.exe

4./main.exe

Example Windows Batch compile command via Intel ifort compiler ⛓
1del main.exe

2set PATH=..\..\..\lib;%PATH%

3ifort /fpp /standard-semantics /O3 /I:..\..\..\include main.F90 ..\..\..\lib\libparamonte*.lib /exe:main.exe

4main.exe

Example Unix / MinGW compile command via GNU gfortran compiler ⛓
1#!/usr/bin/env sh

2rm main.exe

3gfortran -cpp -ffree-line-length-none -O3 -Wl,-rpath,../../../lib -I../../../inc main.F90 ../../../lib/libparamonte* -o main.exe

4./main.exe

Example output ⛓
1

2!%%%%%%%%%%%%%%%%%%%%%%%

3!count character scalar.

4!%%%%%%%%%%%%%%%%%%%%%%%

5

6array = 'Paramonte is a Machine Learning Library '

7pattern = ' '

8getCountLoc(array, pattern)

9+8

10getCountLoc(array, pattern, blindness = 3_IK)

11+5

12getCountLoc(array, pattern, border = discrete)

13+6

14getCountLoc(array, pattern, border = discrete, blindness = 3_IK)

15+4

16getCountLoc(array, SKG_'m', iseq_SK) ! find with custom case-insensitive search.

17+2

18getCountLoc(array, SKG_'m')

19+1

20

21!%%%%%%%%%%%%%%%%%%%%%%

22!count character array.

23!%%%%%%%%%%%%%%%%%%%%%%

24

25array = [character(9,SKG) :: 'xxx', 'Paramonte', 'XXX', 'is', 'XXX', 'a', 'XXX', 'Monte', 'XXX', 'Carlo', 'XXX', 'XXX', 'XXX', 'Library.', 'XXX']

26pattern = 'XXX'

27getCountLoc(array, pattern)

28+8

29getCountLoc(array, pattern, blindness = 3_IK)

30+4

31getCountLoc(array, pattern, border = discrete)

32+6

33getCountLoc(array, pattern, border = discrete, blindness = 3_IK)

34+4

35getCountLoc(array, SKG_'xxx', iseq_SK) ! find with custom case-insensitive search.

36+9

37getCountLoc(array, SKG_'xxx')

38+1

39getCountLoc(array, [character(3,SKG) :: 'XXX', 'XXX']) ! vector pattern

40+2

41

42!%%%%%%%%%%%%%%%%%%%%

43!count integer array.

44!%%%%%%%%%%%%%%%%%%%%

45

46array = [-1, 1, -2, 0, 0, 0, 2, 0, 3, 0, 4]

47pattern = 0

48getCountLoc(array, pattern)

49+5

50getCountLoc(array, pattern, blindness = 3_IK)

51+2

52getCountLoc(array, pattern, border = discrete)

53+3

54getCountLoc(array, pattern, border = discrete, blindness = 3_IK)

55+2

56pattern = 2

57getCountLoc(array, pattern, iseq_IK) ! find any pattern+-1 with custom search.

58+3

59getCountLoc(array, pattern)

60+1

61pattern = 0

62getCountLoc(array, [pattern, pattern]) ! vector pattern

63+2

64

65!%%%%%%%%%%%%%%%%%%%%

66!count logical array.

67!%%%%%%%%%%%%%%%%%%%%

68

69array = [.false., .true., .false., .true., .false., .false., .false., .true., .false.]

70pattern = .false.

71getCountLoc(array, pattern)

72+6

73getCountLoc(array, pattern, blindness = 3_IK)

74+3

75getCountLoc(array, pattern, border = discrete)

76+4

77getCountLoc(array, pattern, border = discrete, blindness = 3_IK)

78+3

79pattern = .true.

80getCountLoc(array, [pattern, .not. pattern], iseqall_LK) ! find any non-equivalent logical pair with custom search: [.true., .false.] or [.false., .true.].

81+6

82getCountLoc(array, [pattern, .not. pattern])

83+3

84

85!%%%%%%%%%%%%%%%%%%%%

86!count complex array.

87!%%%%%%%%%%%%%%%%%%%%

88

89array = [(-1., +1.), (1., 1.), (-1., 0.), (0., 0.), (0., 0.), (0., 0.), (0., 1.), (0., 0.), (3., -3.), (0., 0.), (4., -4)]

90pattern = 0

91getCountLoc(array, pattern)

92+5

93getCountLoc(array, pattern, blindness = 3_IK)

94+2

95getCountLoc(array, pattern, border = discrete)

96+3

97getCountLoc(array, pattern, border = discrete, blindness = 3_IK)

98+2

99pattern = (0., 0.) ! dummy search value.

100getCountLoc(array, pattern, iseq_CK) ! find any complex value whose components have opposite signs.

101+3

102getCountLoc(array, pattern)

103+5

104pattern = 0

105getCountLoc(array, [pattern, pattern]) ! vector pattern

106+2

107

108!%%%%%%%%%%%%%%%%%

109!count real array.

110!%%%%%%%%%%%%%%%%%

111

112array = [-1, 1, -2, 0, 0, 0, 2, 0, 3, 0, 4]

113pattern = 0

114getCountLoc(array, pattern)

115+5

116getCountLoc(array, pattern, blindness = 3_IK)

117+2

118getCountLoc(array, pattern, border = discrete)

119+3

120getCountLoc(array, pattern, border = discrete, blindness = 3_IK)

121+2

122pattern = 2

123getCountLoc(array, pattern, iseq_RK) ! find any whose absolute value is within 0.5 of `pattern`.

124+2

125getCountLoc(array, pattern)

126+1

127pattern = 0

128getCountLoc(array, [pattern, pattern]) ! vector pattern

129+2

130

Test:: test_pm_arrayFind

Bug:: Status: Unresolved
Source: Intel Classic Fortran Compiler ifort version 2021.2.0, GNU Fortran Compiler gfortran version 10-12
Description: The Intel Fortran compiler Classic 2021.2.0 has a bug for the following interface definition

character(len(array),SK), allocatable :: count(:)

leading to an internal compiler error.
For now, the remedy seems to be to redefine the interface as,

character(:, SK), allocatable :: count(:)

and changing the allocation method accordingly in the implementation to,

allocate(character(len(array, kind = IK)) :: count(lenLoc))

However, this introduces internal compiler error: Segmentation fault with gfortran versions 10 and 11.
Here is a code snippet to regenerate the bug in Intel ifort (uncomment the commented line to reproduce the gfortran bug),

module pm_explicitLenResult
    implicit none
    interface
        pure module function bug(array) result(count)
            character(*, SK), intent(in), contiguous    :: array(:)
            character(len(array),SK)    , allocatable   :: count(:) ! catastrophic internal error with ifort 2021.2. Fine with gfortran 10.3
           !character(:, SK)            , allocatable   :: count(:) ! catastrophic internal error with gfortran 10.3. Fine with ifort 2021.2
        end function
    end interface
end module pm_explicitLenResult
 
submodule (pm_explicitLenResult) routines
    implicit none
contains
    module procedure bug
       allocate(count, source = array)
    end procedure
end submodule routines
 
program main
    use pm_explicitLenResult, only: bug
    character(2) :: array(3) = ["AA", "BB", "CC"]
    character(2), allocatable :: count(:)
    count = bug(array)
end program main

It turns out that both gfortran and Intel do not tolerate the separation of interface from implementation in the above code snippet.

Remedy (as of ParaMonte Library version 2.0.0): If one duplicates the interface in the implementation submodule, then both compilers compile and run the code with no errors.
This is the remedy that is currently used in this getCountLoc generic interface (interface duplication where the bug exists).
Here is a workaround example for the bug in the above code snippet,

module pm_explicitLenResult
    implicit none
    interface
        pure module function bug(array) result(count)
            character(*, SK), intent(in), contiguous    :: array(:)
            character(len(array),SK), allocatable   :: count(:) ! catastrophic internal error with ifort 2021.2. Fine with gfortran 10.3
        end function
    end interface
end module pm_explicitLenResult
 
submodule (pm_explicitLenResult) routines
    implicit none
contains
    module procedure bug
       allocate(count, source = array)
    end procedure
end submodule routines
 
program main
    use pm_explicitLenResult, only: bug
    character(2) :: array(3) = ["AA", "BB", "CC"]
    character(2), allocatable :: count(:)
    count = bug(array)
end program main

Todo:: Low Priority: This generic interface can be extended to higher-dimensional input arrays.

Todo:: Critical Priority: Currently, the value of blindness is checked for being non-zero in the implementation.
However, the documentation of blindness requires it to be positive.
This conflict between the implementation and documentation must be resolved.

Todo:: Normal Priority: The functionality of this generic interface can be extended with an optional border argument as in getCountLoc.

Final Remarks ⛓

If you believe this algorithm or its documentation can be improved, we appreciate your contribution and help to edit this page's documentation and source file on GitHub.
For details on the naming abbreviations, see this page.
For details on the naming conventions, see this page.
This software is distributed under the MIT license with additional terms outlined below.

If you use any parts or concepts from this library to any extent, please acknowledge the usage by citing the relevant publications of the ParaMonte library.
If you regenerate any parts/ideas from this library in a programming environment other than those currently supported by this ParaMonte library (i.e., other than C, C++, Fortran, MATLAB, Python, R), please also ask the end users to cite this original ParaMonte library.

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Help us justify its continued development and maintenance by acknowledging its benefit to society, distributing it, and contributing to it.

Copyright: Computational Data Science Lab

Author:: Amir Shahmoradi, September 1, 2017, 12:00 AM, Institute for Computational Engineering and Sciences (ICES), The University of Texas at Austin

Definition at line 366 of file pm_arrayFind.F90.

The documentation for this interface was generated from the following file:

src/fortran/main/pm_arrayFind.F90