Ruby Array New Block

Let s see how you can write a method similar to the map method in ruby.

Ruby array new block.

Nums push 1 the push method appends an item to the end of the array. New first array matz guido first array. One way is with the new class method names array new. Each element in this array is created by passing the element s index to the given block and storing the return value.

Then we add five integers to it. Calling yield for each of the elements in the array mimics the behavior of the built in ruby iterators. Ruby arrays grow automatically while adding elements to them. In the last form an array of the given size is created.

Def my map array new array for element in array new array push yield element end new array end my map 1 2 3 do number number 2 end output 2 4 6. Map is a array class method which returns a new array containing the values returned by the block. New 3 index index 2 0 1 4. First array matz guido second array array.

In the last form an array of the given size is created. Nums array new an array object is created. There are many ways to create or initialize an array. Ruby arrays can hold objects such as string integer fixnum hash symbol even other array objects.

New first array matz guido first array. Usr bin ruby nums array new nums push 1 nums push 2 nums push 3 nums push 4 nums push 5 puts nums in the script we first create a nums array. Ruby arrays are not as rigid as arrays in other languages.