Add items to array collection

Questions
1

Hi, I have a hard time figuring out how arrays work. Here is my problem:

~voice=[1,0,0,1,1]
(~of = 6.collect{|i|~voice})

results in this:

[ [ 1, 0, 0, 1, 1 ], [ 1, 0, 0, 1, 1 ], [ 1, 0, 0, 1, 1 ], [ 1, 0, 0, 1, 1 ], [ 1, 0, 0, 1, 1 ], [ 1, 0, 0, 1, 1 ] ]

How can I add several times 0 to the beginning of each array? E.g. two times 0 to the beginning of the first array, five times 0 to the beginning of the second array, three times 0 to the beginning of the third array, so I get:

[ [ 0, 0, 1, 0, 0, 1, 1 ], [ 0, 0, 0, 0, 0, 1, 0, 0, 1, 1 ], [ 0, 0, 0, 1, 0, 0, 1, 1 ], ...

Thank you in advance!

2 
~voice = [1, 0, 0, 1, 1];
~of = ~voice.size.collect{|i| 
	case( 
		{i == 0}, { 0.dup(2) },
		{i == 1}, { 0.dup(5) },
		{i == 2}, { 0.dup(3) }
	) ++ ~voice 
}

Adding things to the array is done with ++ which is concatenation.

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3

Thank you so much Jordan, this is really helpful and will change the way I work with arrays in the future. Thanks again!

4

Arrays, although seemingly simple, are very powerful and it can be complicated to see how you can use them. The other structure you should look at is Event.

1 Like