在Ruby问题中包含文件

Question

• I am very new to Ruby so could you please suggest the best practice to separating files and including them.
• What is the preferred design structure of the file layout. When do you decide to separate the algorithm into a new file?
• When do you use load to include other files and when do you use require ?
• And is there a performance hit when you include files?

Thanks.

Answer 1

• I make one file per class, except classes that are small helper classes, not needed by other files. I separate my different modules in subdirectories also.

• The difference between load and require is require will only load the file once, even if it's called multiple times, while load will load it again regardless of whether it's been loaded before. You'll almost always want to use require , except maybe in irb when you want to manually want to reload a file.

• I'm not sure on the performance hit. When you load or require a file, the interpreter has to interpret the file. Most Ruby's will compile it to virtual machine code after being required. Obviously, require is more performant when the file may have already been included once, because it may not have to load it again.