Hash#has_value?()是一種哈希類方法,用於檢查哈希中是否存在給定值。
用法:Hash.has_value?()
參數:散列值
返回:true-如果給定值存在於哈希中,否則返回false
範例1:
# Ruby code for Hash.has_value?() method
# declaring Hash value
a = {a:100, b:200}
# declaring Hash value
b = {a:100, c:300, b:200}
# declaring Hash value
c = {a:100}
# has_value? Value
puts "Hash a has_value? form:#{a.has_value?(200)}\n\n"
puts "Hash b has_value? form:#{b.has_value?(10)}\n\n"
puts "Hash c has_value? form:#{c.has_value?(100)}\n\n"
輸出:
Hash a has_value? form:true Hash b has_value? form:false Hash c has_value? form:true
範例2:
# Ruby code for Hash.has_value?() method
# declaring Hash value
a = { "a" => 100, "b" => 200 }
# declaring Hash value
b = {"a" => 100}
# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}
# has_value? Value
puts "Hash a has_value? form:#{a.has_value?(200)}\n\n"
puts "Hash b has_value? form:#{b.has_value?(10)}\n\n"
puts "Hash c has_value? form:#{c.has_value?(100)}\n\n"
輸出:
Hash a has_value? form:true Hash b has_value? form:false Hash c has_value? form:true
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注:本文由純淨天空篩選整理自Kirti_Mangal大神的英文原創作品 Ruby | Hash has_value?() function。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。