Ruby Splat Operator

You ve probably used splats for catch all arguments. Method in the object referred to by variable a is called with b as its argument. In one of my recent posts someone pointed out that using the splat operator would have made some of the code a bit simpler.

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There is a corresponding form of abbreviated assignment operator.

Ruby splat operator. You may use an operator but do a little digging and you ll find that you ve only been scratching the surface of what it s capable of. In other words the last example translates to. This article has been republished on monkey and crow. Splat operator in ruby.

Zoo pet1 pet2 pet3 the splat operator can be used in a case statement. The splat operator can be used to create methods that accept a variable number of arguments. Avoiding creation of array improves performance. The splat operator converts the array into a list of its elements.

One of the things that i love about ruby is the depth of its features. Attr reader title author category that s the power of the splat operator matching operator what is this funny looking ruby. Pet1 pet2 pet3 duck dog cat the collect mode. I ve seen the splat operator being used in method definitions to group remaining arguments but it turns out there are actually quite a few other uses as well.

As of ruby 1 9 you can do some pretty odd things with array destructuring and splatting. The humble splat operator and is a great example. It s pretty similar to the original splat with one difference. 2 one 1 two 2 putting it all together.

Ruby supports a rich set of operators as you d expect from a modern language. B is interpreted as a plus b where the plus. Here s an example for the most basic use of a double splat. So it would be like taking away the array replacing it with everything inside it.

The split mode. Putting the star before an object invokes the splat operator which has a variety of effects first we ll start with some very useful examples then we will poke around the dark corners of ruby s arrays and the splat operator. The double splat operator came out back in ruby 2 0. For example a plus.

Most operators are actually method calls. It can be used for hashes. For each operator plus. Case when with splat operator use instructions like duparray concatarray which result in creation of arrays.

Here is how to create a method that adds a variable number of numbers passed as arguments. Def doublesplat nums p numsenddoublesplat one.