那么只是修改原始字符串的铲子操作符吗?为什么这样做,它看起来像:
hi = original_string
表现得像某种指针?我可以获得一些关于何时以及如何以及为何如此行为的见解?
def test_the_shovel_operator_modifies_the_original_string original_string = "Hello," hi = original_string there = "World" hi << there assert_equal "Hello,World",original_string # THINK ABOUT IT: # # Ruby programmers tend to favor the shovel operator (<<) over the # plus equals operator (+=) when building up strings. Why? end