for _,node in ipairs(protos.rnn.forwardnodes) do a,b = whatever(a,b) end
这个’变量命名约定'(可以这么说)也用于其他情况,如:
local _,loss = optimizer(feval,params,optim_state)
_是否有任何特殊含义,或者它只是一个可变名称,在众多可能的名称中?
The variable consisting of only an underscore “_” is commonly used as a placeholder when you want to ignore the variable…
阅读更多here(在命名部分下).