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Node.js friendly form of the arity checking decorator for javascript
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exports.arity_decorator = function(fun) { | |
function wrapped() { | |
if(arguments.length != fun.length) | |
throw new Error("Y U NO USE RIGHT?!") | |
fun.apply(this, arguments) | |
} | |
return wrapped; | |
} | |
exports.foo = function(x, y) { | |
console.log('X:' + x) | |
console.log('Y:' + y) | |
} | |
exports.foo = exports.arity_decorator(exports.foo) |
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var arity_check = require("./arity_check"); | |
var bar = function(z) { | |
console.log('Hi. Z:' + z); | |
} | |
bar = arity_check.arity_decorator(bar) | |
arity_check.foo(3,4) // Works | |
bar(5) // Works | |
bar(5,6,7) // Throws error |
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