Why do we need openArray? Rather what is the difference between openArray and
seq?
var
fruits: seq[string] # reference to a sequence of strings that is
initialized with '@[]'
capitals: array[3, string] # array of strings with a fixed size
capitals = ["New York", "London", "Berlin"] # array 'capitals' allows
assignment of only three elements
fruits.add("Banana") # sequence 'fruits' is dynamically expandable
during runtime
fruits.add("Mango")
proc openArraySize(oa: openArray[string]): int =
oa.len
assert openArraySize(fruits) == 2 # procedure accepts a sequence as
parameter
assert openArraySize(capitals) == 3 # but also an array type
Run
However the same can be achieved using seq as well. Like
var
fruits: seq[string] # reference to a sequence of strings that is
initialized with '@[]'
capitals: array[3, string] # array of strings with a fixed size
capitals = ["New York", "London", "Berlin"] # array 'capitals' allows
assignment of only three elements
fruits.add("Banana") # sequence 'fruits' is dynamically expandable
during runtime
fruits.add("Mango")
proc openArraySize(oa: seq[string]): int =
oa.len
assert openArraySize(fruits) == 2 # procedure accepts a sequence as
parameter
assert openArraySize(@capitals) == 3 # but also an array type
Run
Isn't openArray redundant?
