Ruby Return Value

Ruby provides a keyword that allows the developer to explicitly stop the execution flow of a method and return a specific value.

Ruby return value.

This returned value will be the value of the last statement. It is similar to an array except that indexing is done via arbitrary keys of any. For example def test i 100 j 10 k 0 end this method when called will return the last declared variable k. Employee salary.

This operator compares two ruby objects and returns 1 if the object on the left is smaller 0 if the objects are the same and 1 if the object on the left is bigger. New 3 index index 2 0 1 4 common gotchas when sending the second parameter the same object will be used as the value for all the array. When you access any key in a hash that has a default value if the key or value doesn t exist accessing the hash will return the default value. 1 2 1 2 2 0 2 1 1 ruby s sort method accepts a block that must return 1 0 or 1 which it then uses to sort the values in the array.

The return statement in ruby is used to return one or more values. On the other hand if you use first some could think that your method returned a custom object that contains a method named first. 3 02 here are our add and subtract methods from before. Hashes enumerate their values in the order that the corresponding keys were inserted.

Anyway just a personal taste thing. The returned object can be anything but a method can only return one thing and it also always returns something. In the last form an array of the given size is created. 2 49 well ruby methods have a return value 2 51 a value that they send back to the code that called them.

2 53 here the return value from gets is getting assigned to the variable answer. Here we can see that a call to explicit return call executes all. In ruby a method always return exactly one single thing an object. 2 56 let s take a look at return values in another context though.

Return values from methods. Each element in this array is created by passing the element s index to the given block and storing the return value. Every method always returns exactly one object. Also called associative arrays they are similar to arrays but where an array uses integers as its index a hash allows you to use any object type.

The object returned could be the object nil meaning nothing but it still is an object. Ruby hashes a hash is a collection of key value pairs like this.