标签：oba span creat ret called 参数绑定 rip function air
对于某一个函数， 其被调用多次， 每次调用的入参都是一致的。
不想每次都填写参数， 如果能够定义一个新的函数， 将参数跟此函数绑定就棒哒哒了。
local function pirntfunc(...) local args = {...} for _,arg in pairs(args) do print(arg) end end pirntfunc(1, 2) pirntfunc(1, 2) pirntfunc(1, 2) pirntfunc(1, 2) -- can we have printFunc12， equivalent to printFunc called with 1,2 pirntfunc12()
类似javascript function.bind功能：
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind
function list() { return Array.prototype.slice.call(arguments); } var list1 = list(1, 2, 3); // [1, 2, 3] // Create a function with a preset leading argument var leadingThirtysevenList = list.bind(null, 37); var list2 = leadingThirtysevenList(); // [37] var list3 = leadingThirtysevenList(1, 2, 3); // [37, 1, 2, 3]
local function pirntfunc(...) local args = {...} for _,arg in pairs(args) do print(arg) end end pirntfunc(1, 2) local function makePrintFunc(...) local args = {...} return function() pirntfunc(unpack(args)) end end local printfuncBindedArg = makePrintFunc(4, 5) printfuncBindedArg()
LOG:
>lua -e "io.stdout:setvbuf ‘no‘" "test.lua"
1
2
4
5
标签：oba span creat ret called 参数绑定 rip function air
原文地址：http://www.cnblogs.com/lightsong/p/6079660.html
