Ruby Symbol empty?用法及代码示例

Symbol＃empty？()：empty？()是Symbol类方法，它检查符号是否为空。

用法：Symbol.empty?()

参数：符号值

返回：true-如果符号为空，否则返回false

范例1：

# Ruby code for Symbol.empty?() method 
  
# declaring Symbol  
a = :aBcDeF
  
# declaring Symbol 
b =:"\u{e4 f6 fc}"
  
# declaring Symbol 
c =:ABCDEF
  
# Symbol  
puts "Symbol a:#{a}\n\n"
puts "Symbol b:#{b}\n\n"
puts "Symbol c:#{c}\n\n\n\n"
  
  
# empty? form  
puts "Symbol a empty? form:#{a.empty?}\n\n"
puts "Symbol b empty? form:#{b.empty?}\n\n"
puts "Symbol c empty? form:#{c.empty?}\n\n"

输出：

Symbol a:aBcDeF

Symbol b:äöü

Symbol c:ABCDEF



Symbol a empty? form:false

Symbol b empty? form:false

Symbol c empty? form:false

范例2：

# Ruby code for Symbol.empty?() method 
  
# declaring Symbol  
a = :geeks
  
# declaring Symbol 
b =:"\u{e5 f6 f3}"
  
# declaring Symbol 
c = ""
  
# Symbol  
puts "Symbol a:#{a}\n\n"
puts "Symbol b:#{b}\n\n"
puts "Symbol c:#{c}\n\n\n\n"
  
  
# empty? form  
puts "Symbol a empty? form:#{a.empty?}\n\n"
puts "Symbol b empty? form:#{b.empty?}\n\n"
puts "Symbol c empty? form:#{c.empty?}\n\n"

输出：

Symbol a:geeks

Symbol b:åöó

Symbol c:



Symbol a empty? form:false

Symbol b empty? form:false

Symbol c empty? form:true

相关用法

注：本文由纯净天空筛选整理自mayank5326大神的英文原创作品 Ruby | Symbol empty? function。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。