Ruby Splat Operator

Method in the object referred to by variable a is called with b as its argument. As of ruby 1 9 you can do some pretty odd things with array destructuring and splatting. The double splat operator came out back in ruby 2 0.

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Ruby supports a rich set of operators as you d expect from a modern language.

Ruby splat operator.

The split mode. 2 one 1 two 2 putting it all together. In other words the last example translates to. This article has been republished on monkey and crow.

For each operator plus. It s pretty similar to the original splat with one difference. There is a corresponding form of abbreviated assignment operator. Avoiding creation of array improves performance.

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. 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. You ve probably used splats for catch all arguments. It can be used for hashes.

Def doublesplat nums p numsenddoublesplat one. The humble splat operator and is a great example. In one of my recent posts someone pointed out that using the splat operator would have made some of the code a bit simpler. Here is how to create a method that adds a variable number of numbers passed as arguments.

For example a plus. 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. Zoo pet1 pet2 pet3 the splat operator can be used in a case statement.

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. Case when with splat operator use instructions like duparray concatarray which result in creation of arrays. One of the things that i love about ruby is the depth of its features. Splat operator in ruby.

The splat operator can be used to create methods that accept a variable number of arguments. B is interpreted as a plus b where the plus. Most operators are actually method calls. The splat operator converts the array into a list of its elements.

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.