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Ruby Array at()用法及代碼示例


Array#at():at()是一個Array類方法,它以特定的實參索引值返回元素。

用法: Array.at()

參數: 
- Arrays to search elements. 
- index to search

返回: Array element at a specific index value

代碼#1:at()方法示例

# Ruby code for at() method 
   
# declaring array 
a = [18, 22, 33, 4, 5, 6] 
   
# declaring array 
b = [5, 4, 22, 1, 88, 9] 
   
# declaring array 
c = [18, 22, 33, 40, 50, 16] 
  
# finding the array element at  
# given index 
  
puts "element:#{a.at(4)}\n\n"
  
puts "element:#{a.at(-1)}\n\n"
  
puts "element:#{b.at(-2)}\n\n"
  
puts "element:#{c.at(-4)}\n\n"

輸出:


element:5

element:6

element:88

element:33

代碼2:at()方法示例

# Ruby code for at() method 
   
# declaring array 
a = ["abc", "xyz", "dog"] 
   
# declaring array 
b = ["cow", "cat", "dog"] 
   
# declaring array 
c = ["cat", "1", "dog"] 
  
# finding the array element at  
# given index 
puts "element:#{a.at(4)}\n\n"
  
puts "element:#{a.at(-1)}\n\n"
  
puts "element:#{b.at(-2)}\n\n"
  
puts "element:#{c.at(2)}\n\n"

輸出:

element:

element:dog

element:cat

element:dog


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注:本文由純淨天空篩選整理自mayank5326大神的英文原創作品 Ruby | Array at() operation。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。