Ruby on rails 与命令行相比，ruby中的新哈希声明返回语法错误

我试图在ruby中声明新的散列，它有两个键和数组作为相应键的值。 我不明白的问题是，当我在pry（即命令行）中运行它时，与运行

.rb

文件时相比，它没有给出任何语法错误。我的代码如下

[1] pry(main)> newhash = {
[1] pry(main)*   N: ["unsq", "34n","28"],
[1] pry(main)*   L: ["aston", "timesq", "place"]
[1] pry(main)* }
 => {:N=>["unsq", "34n", "28"], :L=>["aston", "timesq", "place"]}
[2] pry(main)> newhash[:N]
 => ["unsq", "34n", "28"]
[3] pry(main)> newhash[:N][1] #returns the correct values
 => "34n" #returns the correct values

当我在

.rb

文件中使用相同语法声明新哈希时，它返回错误

mtahash = {
  N : ["timesq", "34thn", "28thn", "23rdn", "Union_Square", "8th"],
  L : ["8th", "6th", "Union_Square", "3rd", "1st"],
  }
puts mtahash[:N]
puts mtahash[:N][4]

运行并抛出错误作为

MTA.rb:2: syntax error, unexpected ':', expecting =>
  N : ["Times_Square", "34thn", "2...
   ^
MTA.rb:2: syntax error, unexpected ',', expecting end-of-input
...23rdn", "Union_Square", "8th"],
...                              ^
Farwas-MBP:day2 farwaabid$ ruby MTA.rb
MTA.rb:2: syntax error, unexpected ':', expecting =>
N : ["timesq", "34thn", "28thn",...
^
MTA.rb:2: syntax error, unexpected ',', expecting end-of-input
...23rdn", "Union_Square", "8th"],
...                              ^

---

：

前面没有空格。离开

mtahash = {
  N : ["timesq", "34thn", "28thn", "23rdn", "Union_Square", "8th"],
  L : ["8th", "6th", "Union_Square", "3rd", "1st"],
  }

到

---

如果在键和冒号之间留有空格，请尝试不使用：

N: ["timesq", "34thn", "28thn", "23rdn", "Union_Square", "8th"],

---

等等。

{a:23}

是

{:a=>23}

的简写，仅用于符号键。您不能放置空格，因此

a:

有效，但

a:

无效

此外，根据ruby约定，不建议使用大写形式作为符号（即使它有效），因此请使用

：n

而不是

：n

提示：您说您使用的是“相同的语法”，但您没有。

N: ["timesq", "34thn", "28thn", "23rdn", "Union_Square", "8th"],