unable to reason

[Daun Jaun]

statArr=[]
for i in 0...3
statArr=[]
for j in 0...3
statArr[j]=[]
for k in 0...2
statArr[j][k]=0
end
end
end

p statArr
statArr[0][2][1]+=3
statArr[1][0][0]+=2
statArr[2][2][1]+=1
p statArr

statArr=Array.new(3,Array.new(3,Array.new(2,0)))
p statArr
statArr[0][2][1]+=3
statArr[1][0][0]+=2
statArr[2][2][1]+=1
p statArr


what is going on in the above code why is there the discrepancy in the output
is it a bug or paraller processing feature

please figure it out and explain

 

[Eric Hodel]

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statArr=[]
for i in 0...3
statArr=[]
for j in 0...3
statArr[j]=[]
for k in 0...2
statArr[j][k]=0
end
end
end

p statArr
statArr[0][2][1]+=3
statArr[1][0][0]+=2
statArr[2][2][1]+=1
p statArr

statArr=Array.new(3,Array.new(3,Array.new(2,0)))

Here you asked Ruby to create an Array containing three copies of the
same Array, not three different Arrays.

try stat_arr = Array.new 3 { Array.new 3 { Array.new 2, 0 }}

p statArr
statArr[0][2][1]+=3
statArr[1][0][0]+=2
statArr[2][2][1]+=1
p statArr


what is going on in the above code why is there the discrepancy in the
output
is it a bug or paraller processing feature

It is your bug

--
Eric Hodel - (e-mail address removed) - http://segment7.net
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[Csaba Henk]

what is going on in the above code why is there the discrepancy in the output
is it a bug or paraller processing feature

please figure it out and explain

Meditate over the following koan:

Array.new(3,"x").map{|x| x.object_id}.uniq.size

Csaba

 

[Daun Jaun]

i didnot get it
trying stat_arr = Array.new 3 { Array.new 3 { Array.new 2, 0 }}
gave syntax error

 

[Eric Hodel]

--Apple-Mail-24--274755446
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i didnot get it
trying stat_arr = Array.new 3 { Array.new 3 { Array.new 2, 0 }}
gave syntax error

oops, you need some ()s, sorry

stat_arr = Array.new(3) { Array.new(3) { Array.new 2, 0 }}

--
Eric Hodel - (e-mail address removed) - http://segment7.net
FEC2 57F1 D465 EB15 5D6E 7C11 332A 551C 796C 9F04

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