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- import tables
- doAssert indexBy(newSeq[int](), proc(x: int):int = x) == initTable[int, int](), "empty int table"
- var tbl1 = initTable[int, int]()
- tbl1.add(1,1)
- tbl1.add(2,2)
- doAssert indexBy(@[1,2], proc(x: int):int = x) == tbl1, "int table"
- type
- TElem = object
- foo: int
- bar: string
- let
- elem1 = TElem(foo: 1, bar: "bar")
- elem2 = TElem(foo: 2, bar: "baz")
- var tbl2 = initTable[string, TElem]()
- tbl2.add("bar", elem1)
- tbl2.add("baz", elem2)
- doAssert indexBy(@[elem1,elem2], proc(x: TElem): string = x.bar) == tbl2, "element table"
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