54 lines
1.1 KiB
Nim
54 lines
1.1 KiB
Nim
discard """
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output: ""
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"""
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import deques, sequtils
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block tapply:
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var x = @[1, 2, 3]
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x.apply(proc(x: var int) = x = x+10)
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x.apply(proc(x: int): int = x+100)
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x.applyIt(it+5000)
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doAssert x == @[5111, 5112, 5113]
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block tdeques:
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proc index(self: Deque[int], idx: Natural): int =
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self[idx]
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proc main =
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var testDeque = initDeque[int]()
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testDeque.addFirst(1)
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assert testDeque.index(0) == 1
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main()
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block tmapit:
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var x = @[1, 2, 3]
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# This mapIt call will run with preallocation because ``len`` is available.
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var y = x.mapIt($(it+10))
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doAssert y == @["11", "12", "13"]
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type structureWithoutLen = object
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a: array[5, int]
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iterator items(s: structureWithoutLen): int {.inline.} =
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yield s.a[0]
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yield s.a[1]
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yield s.a[2]
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yield s.a[3]
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yield s.a[4]
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var st: structureWithoutLen
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st.a[0] = 0
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st.a[1] = 1
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st.a[2] = 2
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st.a[3] = 3
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st.a[4] = 4
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# this will run without preallocating the result
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# since ``len`` is not available
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var r = st.mapIt($(it+10))
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doAssert r == @["10", "11", "12", "13", "14"]
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