diff options
Diffstat (limited to 'lib/system.nim')
| -rwxr-xr-x | lib/system.nim | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/lib/system.nim b/lib/system.nim index dad8d2d79..8eabe797a 100755 --- a/lib/system.nim +++ b/lib/system.nim @@ -1099,6 +1099,15 @@ iterator items*(a: cstring): char {.inline.} = yield a[i] inc(i) +iterator enumerate*[TContainer, TItem](a: TContainer): tuple[ + index: int, item: TItem] {.inline.} = + ## iterates over each item of `a` via `items` and yields an additional + ## counter/index starting from 0. + var j = 0 + for it in items(a): + yield (j, a) + inc j + proc isNil*[T](x: seq[T]): bool {.noSideEffect, magic: "IsNil".} proc isNil*[T](x: ref T): bool {.noSideEffect, magic: "IsNil".} proc isNil*(x: string): bool {.noSideEffect, magic: "IsNil".} @@ -1108,20 +1117,20 @@ proc isNil*(x: cstring): bool {.noSideEffect, magic: "IsNil".} ## Fast check whether `x` is nil. This is sometimes more efficient than ## ``== nil``. -proc `&` *[T](x, y: openArray[T]): seq[T] {.noSideEffect.} = +proc `&` *[T](x, y: seq[T]): seq[T] {.noSideEffect.} = newSeq(result, x.len + y.len) for i in 0..x.len-1: result[i] = x[i] for i in 0..y.len-1: result[i+x.len] = y[i] -proc `&` *[T](x: openArray[T], y: T): seq[T] {.noSideEffect.} = +proc `&` *[T](x: seq[T], y: T): seq[T] {.noSideEffect.} = newSeq(result, x.len + 1) for i in 0..x.len-1: result[i] = x[i] result[x.len] = y -proc `&` *[T](x: T, y: openArray[T]): seq[T] {.noSideEffect.} = +proc `&` *[T](x: T, y: seq[T]): seq[T] {.noSideEffect.} = newSeq(result, y.len + 1) for i in 0..y.len-1: result[i] = y[i] |