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zip(*args) public

Converts any arguments to arrays, then merges elements of self with corresponding elements from each argument. This generates a sequence of self.size n-element arrays, where n is one more that the count of arguments. If the size of any argument is less than enumObj.size, nil values are supplied. If a block is given, it is invoked for each output array, otherwise an array of arrays is returned.

a = [ 4, 5, 6 ]
b = [ 7, 8, 9 ]
[1,2,3].zip(a, b)      #=> [[1, 4, 7], [2, 5, 8], [3, 6, 9]]
[1,2].zip(a,b)         #=> [[1, 4, 7], [2, 5, 8]]
a.zip([1,2],[8])       #=> [[4,1,8], [5,2,nil], [6,nil,nil]]
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August 6, 2009
2 thanks

Second example is correct

@taryneast, the second example is correct. The receiver’s #size limits the result’s.

nachokb

May 7, 2009
0 thanks

question?

Shouldn’t the second example be:

[1,2].zip(a,b)         #=> [[1, 4, 7], [2, 5, 8], [nil,6,9]]

??? or am I missing something?

January 22, 2014
0 thanks

re: question?

Nope. Read it again:

> This generates a sequence of self.size n-element arrays

If any of the arguments are longer than the receiver, the elements beyond the receiver’s length are ignored