I work with rails console and often i need to preload some ruby code to work with.
我使用rails控制台，经常需要预加载一些ruby代码。
#file that i want to load in rails console
#my_file.rb
a = 1
b = 2
puts a + b
When i run my console with ./script/console
当我使用。/脚本/控制台运行控制台时
rails-console :001 > load 'my_file.rb'
3
=> []
rails-console :002 > a
NameError: undefined local variable or method 'a' for #<Object:123445>
How can i get access to my 'a' and 'b' variables in console?
如何访问控制台中的“a”和“b”变量?
2 个解决方案
#1
16
When you load a file local variables go out of scope after the file is loaded that is why a and b will be unavailable in the console that loads it.
当加载文件时，本地变量在加载文件后超出范围，这就是为什么加载文件的控制台中a和b不可用的原因。
Since you are treating a and b as constants how about just capitalizing them like so
既然你把a和b看做常数那么把它们资本化
A = 1
B = 2
puts A+B
Now in you console you should be able to do the following
现在在您的控制台中，您应该能够执行以下操作
load 'myfile.rb'
A #=> 1
Alternately you could make the variables in myfile.rb global ($a, $b)
或者，您可以在myfile中创建变量。rb全球(a,b)美元
#2
0
First of all, you should use an irbrc. Please read more here for example.
首先，您应该使用irbrc。请在这里阅读更多的例子。
Then you could define a method in your irbrc to mock your variables:
然后你可以在irbrc中定义一个方法来模拟你的变量:
def a
[1, 2, 4]
end
but I prefer to add methods to specific Ruby classes like:
但是我更喜欢为特定的Ruby类添加方法，比如:
class Array
def self.toy(n=10,&block)
block_given? ? Array.new(n,&block) : Array.new(n) {|i| i+1}
end
end
#1
16
When you load a file local variables go out of scope after the file is loaded that is why a and b will be unavailable in the console that loads it.
当加载文件时，本地变量在加载文件后超出范围，这就是为什么加载文件的控制台中a和b不可用的原因。
Since you are treating a and b as constants how about just capitalizing them like so
既然你把a和b看做常数那么把它们资本化
A = 1
B = 2
puts A+B
Now in you console you should be able to do the following
现在在您的控制台中，您应该能够执行以下操作
load 'myfile.rb'
A #=> 1
Alternately you could make the variables in myfile.rb global ($a, $b)
或者，您可以在myfile中创建变量。rb全球(a,b)美元
#2
0
First of all, you should use an irbrc. Please read more here for example.
首先，您应该使用irbrc。请在这里阅读更多的例子。
Then you could define a method in your irbrc to mock your variables:
然后你可以在irbrc中定义一个方法来模拟你的变量:
def a
[1, 2, 4]
end
but I prefer to add methods to specific Ruby classes like:
但是我更喜欢为特定的Ruby类添加方法，比如:
class Array
def self.toy(n=10,&block)
block_given? ? Array.new(n,&block) : Array.new(n) {|i| i+1}
end
end