[英]Ruby string prepend '\' character
why ruby is prepends '\\' character while I am trying to run below code. 为什么在我尝试在代码下运行时,ruby前面加了“ \\”字符。 It is happening with only '#$'
只有'#$'
It is happening with all ruby version. 所有红宝石版本都在发生这种情况。
puts '#$' => '\#$'
or 要么
'#$' => '\#$'
or 要么
'mypassord#$123' => 'mypassord\#$123'
Please share you experience here. 请在这里分享您的经验。 Is it a ruby problem or anything?
是红宝石问题还是什么?
No it is not a ruby problem. 不,这不是红宝石问题。 It is your problem.
这是你的问题。 Since
#$foo
can be interpreted as interpolation of the global variable $foo
, it is necessary to escape the #
character. 由于
#$foo
可以解释为全局变量$foo
插值,因此必须对#
字符进行转义。 That is why there is a backslash. 这就是为什么要加反斜杠的原因。
To be more precise, there is no possibility of interpolation with the string "#$"
( $
is an invalid global variable) or "#$123"
( $123
is an invalid global variable), but it makes the inspection algorithm or the interpolation algorithm complicated to check the sequence after #$
, so I guess that is why #
is escaped even in such cases. 更精确地说,不可能使用字符串
"#$"
( $
是无效的全局变量)或"#$123"
( $123
是无效的全局变量)进行插值,但是它使检查算法或插值算法成为可能。检查#$
之后的序列很复杂,所以我想这就是为什么即使在这种情况下也转义了#
原因。
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