Ruby Array Select

If no block is given.

Ruby array select.

When a size and an optional default are sent an array is created with size copies of default take notice that all elements will reference the same object default. Ruby latest stable v2 5 5 0 notes class. You can learn about boolean values in ruby by reading this article. The second form creates a copy of the array passed as a parameter the array is generated by calling to ary on the parameter.

Inside the block you have to return something that evaluates to true or false and select will use that to filter your array. Select is a array class method which returns a new array containing all elements of array for which the given block returns a true value. Returns a new array. However if you use the select.

Next let s look at how to sort the values of an array. The find all method is an alias for select but there is no find all. Select returns a new object e g. Up until now all the methods we ve seen run essentially independent operations on each element of our array or hash.

Returns a new array containing all elements of ary for which the given block returns a true value. In the first form if no arguments are sent the new array will be empty. Using select requires a block.