diff options
| -rw-r--r-- | julia.html.markdown | 42 |
1 files changed, 25 insertions, 17 deletions
diff --git a/julia.html.markdown b/julia.html.markdown index 222a490a..e1c6731c 100644 --- a/julia.html.markdown +++ b/julia.html.markdown @@ -318,6 +318,17 @@ end varargs(1, 2, 3) #=> (1,2,3) +# The ... is called a splat. +# It can also be used in a fuction call +# to splat a list or tuple out to be the arguments +Set([1,2,3]) #=>Set{Array{Int64,1}}([1,2,3]) # no ..., produces a Set of Arrays +Set([1,2,3]...) #=>Set{Int64}(1,2,3) # this is equivalent to Set(1,2,3) + +x = (1,2,3) #=> (1,2,3) +Set(x) #=> Set{(Int64,Int64,Int64)}((1,2,3)) # a Set of Tuples +Set(x...) #=> Set{Int64}(2,3,1) + + # You can define functions with optional positional arguments function defaults(a,b,x=5,y=6) return "$a $b and $x $y" @@ -338,27 +349,24 @@ keyword_args(name2="ness") #=> ["name2"=>"ness","k1"=>4] keyword_args(k1="mine") #=> ["k1"=>"mine","name2"=>"hello"] keyword_args() #=> ["name2"=>"hello","k2"=>4] +# You can also do both at once +function all_the_args(normal_arg, optional_positional_arg=2; keyword_arg="foo") + println("normal arg: $normal_arg") + println("optional arg: $optional_positional_arg") + println("keyword arg: $keyword_arg") +end + +all_the_args(1, 3, keyword_arg=4) +# prints: +# normal arg: 1 +# optional arg: 3 +# keyword arg: 4 + + #### #### In progress point #### -# You can do both at once, if you like -def all_the_args(*args, **kwargs): - print args - print kwargs -""" -all_the_args(1, 2, a=3, b=4) prints: - [1, 2] - {"a": 3, "b": 4} -""" - -# You can also use * and ** when calling a function -args = (1, 2, 3, 4) -kwargs = {"a": 3, "b": 4} -foo(*args) # equivalent to foo(1, 2, 3, 4) -foo(**kwargs) # equivalent to foo(a=3, b=4) -foo(*args, **kwargs) # equivalent to foo(1, 2, 3, 4, a=3, b=4) - # Python has first class functions def create_adder(x): def adder(y): |