ruby同时给多个变量赋值的方法

ruby和python一样可以一次给多个变量同时赋值，比如a,b=1,2，表示a和b分别赋值1和2，再如：s1,s2=’75271.com’,’haotu.net’。

# 同时给三个变量赋值
a, b, c = 8, 10, 15
print "A: a = ", a, ", b = ", b, ", c = ", c, "\n"

输出

A: a = 8, b = 10, c = 15


# 交换两个变量的值
a, b = b, a
print "C: a = ", a, ", b = ", b, ", c = ", c, "\n"

输出

C: a = 10, b = 8, c = 15

# 左右不对称赋值，c将得到nil
a, b, c = 2, 3
print "D: a = ", a, ", b = ", b, ", c = ", c, "\n"

输出结果：

D: a = 2, b = 3, c =

# 左右不对称赋值，右边多余的将不管
a, b, c = 11, 12, 13, 14, 15
print "E: a = ", a, ", b = ", b, ", c = ", c, "\n"

输出结果如下：

E: a = 11, b = 12, c = 13

# 赋值表达式右边可以是一个数组
fred = [ 4, 5, 6, 7]
a, b, c = fred
print "F: a = ", a, ", b = ", b, ", c = ", c, "\n"

输出结果如下：

F: a = 4, b = 5, c = 6