# README
go-generics
golang generics for common other functions, Must be the lowest level
move all content from go-generics/v2 to go-generics/ go1.22.0 from here, version is v0.5.0
# Functions
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s(any) must be []any.
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T is return type.
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T is return type.
if return type 'T' is []byte, then return value is v's printed string as []byte, NOT binary encoding
optBase is 'parse (u)int base (2, 8, 10, 16)'.
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paths are like '1.2.3', '4.6.2'.
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ConstBytesToStr converts byte slice to string without a memory allocation.
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Equals.
get all fields.
get only exported field value.
*** input data keeps original, return filtered & ordered copy.
*** input data will be changed, filtered data keeps order, BUT return RE-ORDERED original set.
FilterMap : Filter A slice, return A=>B slice.
Filter A slice, return A=>B slice.
set simple primitive.
set map of primitive key & value.
set primitive array or slice.
set map of primitive key & slice of primitive value.
e.g.
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*** IdxOf : returns the index of the first instance of e in slice, or -1 if e is not present in slice.
IF : Ternary Operator LIKE < ? : >, BUT NO S/C src1 and src2 MUST all valid.
*** In : if arr has element e, return true.
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init multiple dimension slice.
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Intersect :.
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IsContinuous : check numbers is continuous int slice.
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check string format is email.
IsInt : Check v is valid int numeric style.
check string is valid IP.
nil-pointer could be non-nil any.
IsNumeric : Check v is valid numeric style.
IsSub :.
IsSuper :.
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IsUint : Check v is valid uint numeric style.
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Iter : for i := range Iter(end) / (start, end) / (start, step, end).
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1,2,3,4 => (1,2), (2,3), (3,4), (4, junk).
IterToSlc : for i := range Iter(end) / (start, end) / (start, step, end).
1,2,3,4 => (1,2,3), (2,3,4), (3,4,junk), (4,junk,junk).
get all json tags.
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last one @ idx=1; first one @ idx=len(arr).
*** LastIdxOf : returns the index of the last instance of e in slice, or -1 if e is not present in slice.
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***.
e.g.
MapCopy:.
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TK1: input map key type; TV1: input map value type; TK2: output map key type; TK2: output map value type;.
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TK1: input map key type; TV1: input map value type; TK2: output map key type; TK2: output map value type;.
MapFilter:.
if fm return 'p' is "", then ignore this (path-value) to be into Nested.
if fm return 'p' is "", then ignore this (path-value) to be into Nested.
MapMerge:.
MapMergeOnValSlc :.
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primitives keep together at leaves if string slice, use html escape symbols [ ] to replace space.
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MapReplMerge.
MapSafeMerge:.
*** MapToKVs : map to key slice & value slice.
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MATCH : NO ShortCut, MUST all valid, e.g.
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*** NotIn : if arr does NOT have element e, return true.
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*** Reduce :.
*** Reorder : any index must less than len(arr); ([4,2,3,1],[2,1,3,0]) => [3,2,1,4].
*** Reverse : [1,2,3] => [3,2,1].
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field must be exported, AND param value type can be converted to field value type.
m MUST have enough indexed space for elements in nested array.
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slc must have enough dimension & capacity for all element, use 'InitSlice' to allocate multiple dimension slice before setting.
*** Settify : remove repeated elements in arr.
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*** SmashArrays : [{2,2}, {3,3,4}, {6,6,8,8}] => {2,2,3,3,4,6,6,8,8}.
*** SmashSets : [{2,2}, {3,3,4}, {6,6,8,8}] => {2,3,4,6,8}.
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StrToConstBytes converts string to byte slice without a memory allocation.
SubEq :.
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SupEq :.
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get all tags.
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fastest, but cannot cover all, e.g.
s(any) is any actual type of slice or array.
s(any) is any actual type of slice or array, T is return type.
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Union :.
get all validator tags.
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*** ZipSlice : [{1,2}, {3,4,5}, {6,7,8,9}] => [{1,3,6}, {2,4,7}].
# Constants
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