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docs minor and #15335 (#15337)

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flywind 2020-09-16 20:58:50 +08:00 • committed by GitHub
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7
lib/pure/collections/sequtils.nim
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@ -809,10 +809,17 @@ template foldl*(sequence, operation: untyped): untyped =
multiplication = foldl(numbers, a * b) multiplication = foldl(numbers, a * b)
words = @["nim", "is", "cool"] words = @["nim", "is", "cool"]
concatenation = foldl(words, a & b) concatenation = foldl(words, a & b)
procs = @["proc", "Is", "Also", "Fine"]
proc foo(acc, cur: string): string =
result = acc & cur
assert addition == 25, "Addition is (((5)+9)+11)" assert addition == 25, "Addition is (((5)+9)+11)"
assert subtraction == -15, "Subtraction is (((5)-9)-11)" assert subtraction == -15, "Subtraction is (((5)-9)-11)"
assert multiplication == 495, "Multiplication is (((5)*9)*11)" assert multiplication == 495, "Multiplication is (((5)*9)*11)"
assert concatenation == "nimiscool" assert concatenation == "nimiscool"
assert foldl(procs, foo(a, b)) == "procIsAlsoFine"
let s = sequence let s = sequence
assert s.len > 0, "Can't fold empty sequences" assert s.len > 0, "Can't fold empty sequences"