ruby array

Array.fill()方法 (Array.fill() Method)

In this article, we will study about Array.fill() method. You all must be thinking the method must be doing something related to populate the Array instance. Well, we will figure this out in the rest of our content.

在本文中，我们将研究Array.fill()方法 。 你们都必须认为该方法必须做一些与填充Array实例有关的事情。 好吧，我们将在其余内容中解决这个问题。

Method description:

方法说明：

This method is one of the examples of the Public instance method which is specially defined in the Ruby library for Array class. This method is used to populate the Array instances. You can fill multiple objects in the object of the Array class with the help of this method. This method is one of the examples of Destructive methods. This method has many forms and we will be studying them in the rest of the content. There are two of its types are present in this article and are demonstrated with the help of syntaxes and program codes.

此方法是Ruby类库中为Array类专门定义的Public实例方法的示例之一。 此方法用于填充Array实例。 您可以借助此方法在Array类的对象中填充多个对象。 此方法是破坏性方法的示例之一。 这种方法有多种形式，我们将在其余内容中对其进行研究。 本文介绍了它的两种类型，并在语法和程序代码的帮助下进行了演示。

Type 1: fill(start [, length] ) { |index| block } -> arr

类型1：fill(start [，length]){| index | 块}-> arr

The Array instance will be populated with the indexes and you can manipulate the index as per your requirements.

Array实例将使用索引填充，您可以根据需要操作索引。

Syntax:

句法：

    array_instance.fill(start [, length] ) { |index| block }

Example 1:

范例1：

=begin
Ruby program to demonstrate fill method
=end
# array declaration
Array1 = ["Kumar","Ramesh","Apple","Pappu","Sana","Yogita","Satyam","Harish"]
puts "Array fill implementation."
puts "Enter the start index from where you want to start populating:"
st = gets.chomp.to_i
puts "Enter the number of times"
pp = gets.chomp.to_i
Array1.fill(st,pp){|i| i*i}
puts "Array elements are:"
puts Array1

Output

输出量

Array fill implementation.
Enter the start index from where you want to start populating:
2
Enter the number of times
2
Array elements are:
Kumar
Ramesh
4
9
Sana
Yogita
Satyam
Harish

Explanation:

说明：

You can observe in the above example that we are asking the user about two inputs first one is the starting index and another one is the number of times. You can observe that the element on the 2^nd index is replaced by its index with some manipulation and though the user has entered two times then the element on the 3^rd index is replaced by the manipulation of its index.

您可以在上面的示例中观察到，我们在询问用户有关两个输入的信息，第一个是起始索引，第二个是次数。 您可以观察到^第二索引上的元素通过某种操作被其索引替换，尽管用户已输入两次，但^第三索引上的元素^却被对其索引的操作替换。

Type 2: fill(range){|index|block }

类型2：填充(范围){| index | block}

The Array instance will be populated with the indexes and you can manipulate the index as per your requirements. You have to provide the range from where and up to where you want to populate the Array instance with indexes.

Array实例将使用索引填充，您可以根据需要操作索引。 您必须提供从何处到要用索引填充Array实例的范围。

Syntax:

句法：

    array_instance.fill(range){|index| block}

Example 2:

范例2：

=begin
Ruby program to demonstrate fill method
=end
# array declaration
array1 = ["Kumar","Ramesh","Apple","Pappu","Sana","Yogita","Satyam","Harish"]
puts "Array fill implementation."
puts "Enter the starting index:"
st = gets.chomp.to_i
puts "Enter the ending index:"
pp = gets.chomp.to_i
array1.fill(st..pp){|i| i*i}
puts "Array elements are:"
puts array1

Output

输出量

Array fill implementation.
Enter the starting index:
2
Enter the ending index:
4
Array elements are:
Kumar
Ramesh
4
9
16
Yogita
Satyam
Harish

Explanation:

说明：

In the above code, you can observe that we are asking the user for the first index and last index. The user has entered 2 as the starting index and 4 is the ending index. So, you can observe that on the 2^nd, 3^rd and 4^th index, the elements are overwritten with the index manipulation.

在上面的代码中，您可以观察到我们在询问用户第一个索引和最后一个索引。 用户输入了2作为开始索引，输入4是结束索引。 所以，你可以观察到，在第2 ^次 ，第3 ^次和^第 4 ^个索引，所述元件与所述索引操作覆盖。

翻译自: https://www.includehelp.com/ruby/array-fill-method-with-example-3.aspx

ruby array