Ruby * operator before array [duplicate]

问题:

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Closed 7 years ago.

Possible Duplicate:
Understanding ruby splat in ranges and arrays

could anyone tell me what the * does in the following piece of code?

line = "name=yabbi;language=ruby;"
Hash[*line.split(/=|;/)]

Thanks.

回答1:

* is the splat operator. It is used to split an array into a list of arguments.

line.split(/=|;/) returns an array. To create a Hash, each element of the array must be passed as an individual parameter.

回答2:

it's a splat operator Read about it. Often times you see it used when you want to split up an array to use as parameters of a function.