Re: [julia-users] Can't overwrite some methods in 0.5.0

2016-10-19 Thread Yichao Yu 
On Oct 19, 2016 7:26 PM, "Alex Mellnik"  wrote:
>
> Here's my bizarre find of the day.  Most functions can be overwritten
without problems:
>
> function add7(i)
> 7 + i
> end
> Out[1]:
> add7 (generic function with 1 method)
> In [2]:
>
> add7(0)
> add7(0)
> Out[2]:
> 7
> In [3]:
>
> function add7(i)
> 9 + i
> end
> function add7(i)
> 9 + i
> end
> Out[3]:
> add7 (generic function with 1 method)
> WARNING: Method definition add7(Any) in module Main at In[1]:2
overwritten at In[3]:2.
> In [4]:
>
> add7(0)
> Out[4]:
> 9
>
> However, others can not:
>
> using DataFrames
> df = DataFrame(A=[1,2,3], B=["A", "B", "C"])
> println(df)
> 3×2 DataFrames.DataFrame
> │ Row │ A │ B   │
> ├─┼───┼─┤
> │ 1   │ 1 │ "A" │
> │ 2   │ 2 │ "B" │
> │ 3   │ 3 │ "C" │
> In [3]:
>
> row[:A] > 2
> function filter(row)
> if row[:A] > 2
> return 1
> else
> return 3
> end
> end
> Out[3]:
> filter (generic function with 1 method)
> In [4]:
>
> [filter(row) for row in eachrow(df)]
> [filter(row) for row in eachrow(df)]
> Out[4]:
> 3-element Array{Int64,1}:
>  3
>  3
>  1
> In [5]:
>
> rand() > 0.5
> function filter(row)
> if row[:A] > 2
> return 2
> else
> return 4
> end
> end
> WARNING: Method definition filter(Any) in module Main at In[3]:2
overwritten at In[5]:2
> Out[5]:
> filter (generic function with 1 method)
> .
> In [6]:
>
> [filter(row) for row in eachrow(df)]
> Out[6]:
> 3-element Array{Int64,1}:
>  3
>  3
>  1
>
> What is it about this second example that prevents the newer method from
being used?

Nothing about it but how you use it. It's inlined to the comprehension.

Re: [julia-users] Can't overwrite some methods in 0.5.0

2016-10-19 Thread Alex Mellnik 
Yichao,

I'm afraid I'm not following -- could you expand on that a bit?  Thanks,

Alex

On Wednesday, October 19, 2016 at 4:41:30 PM UTC-7, Yichao Yu wrote:
>
> On Oct 19, 2016 7:26 PM, "Alex Mellnik" > 
> wrote:
> >
> > Here's my bizarre find of the day.  Most functions can be overwritten 
> without problems:
> >
> > function add7(i)
> > 7 + i
> > end
> > Out[1]:
> > add7 (generic function with 1 method)
> > In [2]:
> >
> > add7(0)
> > add7(0)
> > Out[2]:
> > 7
> > In [3]:
> >
> > function add7(i)
> > 9 + i
> > end
> > function add7(i)
> > 9 + i
> > end
> > Out[3]:
> > add7 (generic function with 1 method)
> > WARNING: Method definition add7(Any) in module Main at In[1]:2 
> overwritten at In[3]:2.
> > In [4]:
> >
> > add7(0)
> > Out[4]:
> > 9
> >
> > However, others can not:
> >
> > using DataFrames
> > df = DataFrame(A=[1,2,3], B=["A", "B", "C"])
> > println(df)
> > 3×2 DataFrames.DataFrame
> > │ Row │ A │ B   │
> > ├─┼───┼─┤
> > │ 1   │ 1 │ "A" │
> > │ 2   │ 2 │ "B" │
> > │ 3   │ 3 │ "C" │
> > In [3]:
> >
> > row[:A] > 2
> > function filter(row)
> > if row[:A] > 2
> > return 1
> > else
> > return 3
> > end
> > end  
> > Out[3]:
> > filter (generic function with 1 method)
> > In [4]:
> >
> > [filter(row) for row in eachrow(df)]
> > [filter(row) for row in eachrow(df)]
> > Out[4]:
> > 3-element Array{Int64,1}:
> >  3
> >  3
> >  1
> > In [5]:
> >
> > rand() > 0.5
> > function filter(row)
> > if row[:A] > 2
> > return 2
> > else
> > return 4
> > end
> > end  
> > WARNING: Method definition filter(Any) in module Main at In[3]:2 
> overwritten at In[5]:2
> > Out[5]:
> > filter (generic function with 1 method)
> > .
> > In [6]:
> >
> > [filter(row) for row in eachrow(df)]
> > Out[6]:
> > 3-element Array{Int64,1}:
> >  3
> >  3
> >  1
> >
> > What is it about this second example that prevents the newer method from 
> being used?
>
> Nothing about it but how you use it. It's inlined to the comprehension.
>
>

Re: [julia-users] Can't overwrite some methods in 0.5.0

2016-10-19 Thread Yichao Yu 
On Wed, Oct 19, 2016 at 10:33 PM, Alex Mellnik 
wrote:

> Yichao,
>
> I'm afraid I'm not following -- could you expand on that a bit?  Thanks,
>

https://github.com/JuliaLang/julia/issues/265


>
> Alex
>
> On Wednesday, October 19, 2016 at 4:41:30 PM UTC-7, Yichao Yu wrote:
>
>> On Oct 19, 2016 7:26 PM, "Alex Mellnik"  wrote:
>> >
>> > Here's my bizarre find of the day.  Most functions can be overwritten
>> without problems:
>> >
>> > function add7(i)
>> > 7 + i
>> > end
>> > Out[1]:
>> > add7 (generic function with 1 method)
>> > In [2]:
>> >
>> > add7(0)
>> > add7(0)
>> > Out[2]:
>> > 7
>> > In [3]:
>> >
>> > function add7(i)
>> > 9 + i
>> > end
>> > function add7(i)
>> > 9 + i
>> > end
>> > Out[3]:
>> > add7 (generic function with 1 method)
>> > WARNING: Method definition add7(Any) in module Main at In[1]:2
>> overwritten at In[3]:2.
>> > In [4]:
>> >
>> > add7(0)
>> > Out[4]:
>> > 9
>> >
>> > However, others can not:
>> >
>> > using DataFrames
>> > df = DataFrame(A=[1,2,3], B=["A", "B", "C"])
>> > println(df)
>> > 3×2 DataFrames.DataFrame
>> > │ Row │ A │ B   │
>> > ├─┼───┼─┤
>> > │ 1   │ 1 │ "A" │
>> > │ 2   │ 2 │ "B" │
>> > │ 3   │ 3 │ "C" │
>> > In [3]:
>> >
>> > row[:A] > 2
>> > function filter(row)
>> > if row[:A] > 2
>> > return 1
>> > else
>> > return 3
>> > end
>> > end
>> > Out[3]:
>> > filter (generic function with 1 method)
>> > In [4]:
>> >
>> > [filter(row) for row in eachrow(df)]
>> > [filter(row) for row in eachrow(df)]
>> > Out[4]:
>> > 3-element Array{Int64,1}:
>> >  3
>> >  3
>> >  1
>> > In [5]:
>> >
>> > rand() > 0.5
>> > function filter(row)
>> > if row[:A] > 2
>> > return 2
>> > else
>> > return 4
>> > end
>> > end
>> > WARNING: Method definition filter(Any) in module Main at In[3]:2
>> overwritten at In[5]:2
>> > Out[5]:
>> > filter (generic function with 1 method)
>> > .
>> > In [6]:
>> >
>> > [filter(row) for row in eachrow(df)]
>> > Out[6]:
>> > 3-element Array{Int64,1}:
>> >  3
>> >  3
>> >  1
>> >
>> > What is it about this second example that prevents the newer method
>> from being used?
>>
>> Nothing about it but how you use it. It's inlined to the comprehension.
>>
>>

Re: [julia-users] Can't overwrite some methods in 0.5.0

2016-10-20 Thread Andre Bieler 

>
> I guess I have a similar problem, when using Optim.jl in a IJulia notebook
>

using Optim

function myfunc(a)
println("Hey")
return abs(a)
end


x0 = [1.,2.,3.]
res = optimize(myfunc, x0, iterations=20, method=BFGS())


Now when I redefine myfun() the changes do not propagate through to the 
optimize() call somehow, still using the initial definition.
(I tried with replacing "Hey" with "Ho", still printing "Hey")

What is the recommended way of dealing with this? I really want to redefine 
myfunc to see how it affects the optimization.

Re: [julia-users] Can't overwrite some methods in 0.5.0

2016-10-20 Thread Andre Bieler 
myfunc should return sum(abs(a)) to make actual sense, but this does not 
matter for the problem I have

Re: [julia-users] Can't overwrite some methods in 0.5.0

2016-10-20 Thread Kristoffer Carlsson 
myfunc = a -> begin
println("Hey")
return sum(a)
end

Re: [julia-users] Can't overwrite some methods in 0.5.0

2016-10-20 Thread Alex Mellnik 
Thanks, after 
seeing https://github.com/JuliaLang/julia/issues/265#issuecomment-243056854 
I have a better idea of what's going on and why it doesn't occur in 0.5.  

On Wednesday, October 19, 2016 at 11:59:08 PM UTC-7, Yichao Yu wrote:
>
>
>
> On Wed, Oct 19, 2016 at 10:33 PM, Alex Mellnik  > wrote:
>
>> Yichao,
>>
>> I'm afraid I'm not following -- could you expand on that a bit?  Thanks,
>>
>
> https://github.com/JuliaLang/julia/issues/265
>  
>
>>
>> Alex
>>
>> On Wednesday, October 19, 2016 at 4:41:30 PM UTC-7, Yichao Yu wrote:
>>
>>> On Oct 19, 2016 7:26 PM, "Alex Mellnik"  wrote:
>>> >
>>> > Here's my bizarre find of the day.  Most functions can be overwritten 
>>> without problems:
>>> >
>>> > function add7(i)
>>> > 7 + i
>>> > end
>>> > Out[1]:
>>> > add7 (generic function with 1 method)
>>> > In [2]:
>>> >
>>> > add7(0)
>>> > add7(0)
>>> > Out[2]:
>>> > 7
>>> > In [3]:
>>> >
>>> > function add7(i)
>>> > 9 + i
>>> > end
>>> > function add7(i)
>>> > 9 + i
>>> > end
>>> > Out[3]:
>>> > add7 (generic function with 1 method)
>>> > WARNING: Method definition add7(Any) in module Main at In[1]:2 
>>> overwritten at In[3]:2.
>>> > In [4]:
>>> >
>>> > add7(0)
>>> > Out[4]:
>>> > 9
>>> >
>>> > However, others can not:
>>> >
>>> > using DataFrames
>>> > df = DataFrame(A=[1,2,3], B=["A", "B", "C"])
>>> > println(df)
>>> > 3×2 DataFrames.DataFrame
>>> > │ Row │ A │ B   │
>>> > ├─┼───┼─┤
>>> > │ 1   │ 1 │ "A" │
>>> > │ 2   │ 2 │ "B" │
>>> > │ 3   │ 3 │ "C" │
>>> > In [3]:
>>> >
>>> > row[:A] > 2
>>> > function filter(row)
>>> > if row[:A] > 2
>>> > return 1
>>> > else
>>> > return 3
>>> > end
>>> > end  
>>> > Out[3]:
>>> > filter (generic function with 1 method)
>>> > In [4]:
>>> >
>>> > [filter(row) for row in eachrow(df)]
>>> > [filter(row) for row in eachrow(df)]
>>> > Out[4]:
>>> > 3-element Array{Int64,1}:
>>> >  3
>>> >  3
>>> >  1
>>> > In [5]:
>>> >
>>> > rand() > 0.5
>>> > function filter(row)
>>> > if row[:A] > 2
>>> > return 2
>>> > else
>>> > return 4
>>> > end
>>> > end  
>>> > WARNING: Method definition filter(Any) in module Main at In[3]:2 
>>> overwritten at In[5]:2
>>> > Out[5]:
>>> > filter (generic function with 1 method)
>>> > .
>>> > In [6]:
>>> >
>>> > [filter(row) for row in eachrow(df)]
>>> > Out[6]:
>>> > 3-element Array{Int64,1}:
>>> >  3
>>> >  3
>>> >  1
>>> >
>>> > What is it about this second example that prevents the newer method 
>>> from being used?
>>>
>>> Nothing about it but how you use it. It's inlined to the comprehension.
>>>
>>>
>